Electrician TT-1st Year (set 1)By pulak.univ / February 1, 2024 Welcome to your Electrician TT-1st Year (set 1) 1. What is the name of the safety sign? Deselect Answer Warning sign Mandatory sign Prohibition sign Information sign None 2. What is smothering in extinguishing of fire? Deselect Answer Adding the fuel element to the fire Removing the fuel element from the fire Using of water to lower the temperature Isolating the fire from the supply of oxygen None 3. Which is the physical hazard? Deselect Answer Smoking Vibration Corrosive Radio active None 4. Which is the correct sequence of operation to be performed when using the fire extinguisher? Deselect Answer Pull, Aim, Squeeze, Sweep Pull, Aim, Sweep, Squeeze Push, Arrange, Squeeze, Sweep Push, Arrange, Sweep, Sequence None 5. Which step of the 5s-concept refers “Standardization”? Deselect Answer Step - 1 Step - 2 Step - 3 Step - 4 None 6. Which plier is used for making wire hooks and loops? Deselect Answer Flat nose plier Long nose plier Round nose plier Diagonal cutting plier None 7. What is the use of pincer? Deselect Answer Twisting the flexible wires Cutting small diameter of wires Extracting the pin nails from the wood Holding small objects, where finger cannot reach None 8. What is the name of road safety sign? Deselect Answer Mandatory sign Cautionary sign Informatory sign Prohibition sign None 9. What is the back-ground colour of warning signs in the basic category? Deselect Answer Blue White Yellow Green None 10. Which type of fire extinguisher is used for fire on electrical equipment? Deselect Answer Halon type Foam type Gas cartridge type Stored pressure type None 11. Which is the waste disposal method that produces heat? Deselect Answer Recycling Composting Incineration Waste compaction None 12. Which Personal Protective Equipment (PPE) is used for the protection from fumes? Deselect Answer Apron Goggles Ear mask Nose mask None 13. Which method is used to lift and move heavy loads? Deselect Answer Winches Crane and slings Layers and Rollers Machine moving platforms None 14. What is the full form of BIS? Deselect Answer Board of Indian Standard Bureau of Indian Standard Board of International Standard Bureau of International Standard None 15. What is starving in extinguishing of fire? Deselect Answer Adding fuel to the fire Using water to cool the fire Removing fuel element from the fire Preventing oxygen supply to the fire None 16. What is the name of PPE? Deselect Answer Nose mask Head shield Face shield Hand screen None 17. Which disposal method of waste save lot of energy? Deselect Answer Land fill Recycling Incineration Composting None 18. Which artificial respiration method is to be performed to the victim with injuries on the chest and belly? Deselect Answer Schafer’s method Mouth to mouth method Mouth to nose method Nelson’s arm-lift back pressure method None 19. Which type of occupational health hazard is cause for infection? Deselect Answer Electrical hazard Biological hazard Physiological hazard Psychological hazard None 20. What is the use of this tool? Deselect Answer Holding the hot substances Cutting and twisting the wires Extracting nails from the wood Loosening and tightening the bolts and nuts None 21. How will you diagonise the victim is suffering under cardiac arrest? Deselect Answer Gets pain in spinal guard Mouth will be closed tightly Heavy swelling on his stomach Appears blue colour around his lips None 22. What is the name of the tool? Deselect Answer Wire stripper Crimping tool Combination pliers Diagonal cutting pliers None 23. What is the name of the safety sign? Deselect Answer Warning sign Mandatory sign Prohibition sign Information sign None 24. What will be first-aid to be given to stop the bleeding of the victim? Deselect Answer Applying ointment Keep the injured portion upward Covering the wound portion by dressing Applying pressure over the injured portion None 25. What immediate action should be taken to rescue the victim, if he is still in contact with the electrical power supply? Deselect Answer Pull or push him from the contact by hand Inform your authority about this electric shock Call someone for helping to remove him from contact Break the contact by switching OFF the power supply None 26. What is the name of the cautionary sign? Deselect Answer School Guarded Unguarded Pedestrian crossing None 27. Which is the golden hour for the victim injured on head with risk of dying? Deselect Answer First 15 minutes First 30 minutes First 45 minutes First 60 minutes None 28. Which condition of the victim is referred as COMA stage? Deselect Answer Unconscious but can respond to calls | Conscious but cannot respond to calls Breathing but cannot respond to calls Lie totally senseless and do not respond to calls None 29. What is the use of this gauge? Deselect Answer Check the internal radius of the job Check the diameter of cylindrical job Check the height and parallism of job Set the job on machines parallel to datum None 30. What is the name of the file? Deselect Answer Rasp cut file Single cut file Double cut file Curved cut file None 31. What is the name of the tool? Deselect Answer Divider Inside calliper Odd leg calliper Outside calliper None 32. What is the cause for twisting defect in timber? Deselect Answer Defective storage Uneven shrinkage Improper seasoning Irregularity in growth of branches None 33. What is the use of mortise chisel? Deselect Answer General chiselling work in wood Making rectangular holes in wood Paring and finishing joints in wood Light chiselling cleaning sharp corners and in wood None 34. Which type of stake is used for sharp bends in sheet metal? Deselect Answer Square stake Hatchet stake Blow horn stake Bevel edge square stake None 35. Which type of cold chisel is used for squaring materials at the corners? Deselect Answer Web chisel Cross cut chisel Half round chisel Diamond point chisel None 36. Which type of calliper is used to draw parallel lines along the outer edges of the materials? Deselect Answer Inside calliper Jenny calliper Outside calliper Spring joint calliper None 37. What is the name of the drill bit? Deselect Answer Flat drill bit Taper shank bit Countersink bit None 38. What is the name of the stake used for general purpose in sheet metal work? Deselect Answer Square stake Hatchet stake Blow horn square stake Bevel edge square stake None 39. What is the number 1.25 indicates in ISO metric fine thread M12 x 1.25? Deselect Answer Diametric of the thread Pitch of the thread Depth of the thread Length of the thread None 40. What defect will occur in timber due to irregularity in growth of the branches? Deselect Answer Knot Cupping Cracking Twisting None 41. Which file is used for sharpening the blunt teeth of a tenon saw? Deselect Answer Square file Round file Triangular file Half round file None 42. Name the part marked ‘X’ of the file Deselect Answer Edge Heel Tang Shoulder None 43. What is the name of the angle marked ‘X’ of the chisel? Deselect Answer Rake angle Point angle Clearance angle Inclination angle None 44. What is the use of firmer chisel? Deselect Answer Paring and finishing joints General chiselling work Making rectangular holes in wood Light chiselling and to clean sharp corner None 45. Which type of half lap joint is used if one part of a job meets another part at some distance from the ends? Deselect Answer End-lap input Cross-lap joint Middle-lap joint Corner-half lap joint None 46. Which type of notch is used for making a metal tray with 90° bend and an inside flange? Deselect Answer ‘V’ notch Slant notch Square notch Straight notch None 47. What is the purpose of hem folding in sheet metal work? Deselect Answer Helps for forming a square box Helps for bending sheet metal easily Prevents burrs forming after cutting Prevents the sheet from damage None 48. Which defect in the timber is caused to reduce its strength? Deselect Answer Twisting Cupping Cracking Irregularity None 49. What is the name of the hammer? Deselect Answer Claw hammer | Ball peen hammer Cross peen hammer Straight peen hammer None 50. Which defect in timber is caused due to improper seasoning? Deselect Answer Knot Twisting Cracking Cupping None 51. What is the name of the formation of thread marked as X in the galvanized sheet pipe joint? Deselect Answer Hemp Full form thread Tapered male thread Parallel female thread None 52. Which type of notch is used for bending the edge of the sheet? Deselect Answer ‘V’ notch Slant notch Square notch Straight notch None 53. What is the purpose of cross cut cold chisel? Deselect Answer Cutting keyways Cutting curved grooves Squaring materials at corners Removing metal from large flat surface None 54. Which type of notch is used to make a job with 90° bend? Deselect Answer ‘V’ notch Slant notch Square notch Straight notch None 55. Which type of curve cutting hand saw is used for internal cutting in wood? Deselect Answer Compass saw Key hole saw Coping saw Fret saw None 56. What is the name of the stake used for sheet metal work? Deselect Answer Square stake Hatchet stake Blow-horn stake Bevel-edge square stake None 57. What is the name of tool? Deselect Answer Claw hammer Tack hammer Cross pein hammer Straight pein hammer None 58. Which type of chisel is used for separating metals after chain drilling? Deselect Answer Flat chisel Web chisel Cross cut chisel Diamond point chisel None 59. Which type of stake is used for riveting or seaming tapered cone shaped articles? Deselect Answer Square stake Hatchet stake Blow horn stake Bevel edged square stake None 60. Which causes knot defect in timbers? Deselect Answer Defective storage Uneven shrinkage Growth of branches Improper seasoning None 61. What is the current carrying capacity of 32 amp. rated cable, if it is protected by the rewireable fuse? | Deselect Answer 13 Amp 16 Amp 26 Amp 39 Amp None 62. What is the possible range to measure the size of the wire in a Standard Wire Gauge (SWG)? Deselect Answer 0-44 0-42 0-38 0-36 None 63. Which type of soldering flux is used for soldering galvanised iron? Deselect Answer Rosin Zinc chloride Sal ammonia Hydrochloric acid None 64. Which method of soldering is used for quantity production and for tinning work? Deselect Answer Dip soldering Soldering with a flame Soldering with soldering iron Soldering with soldering gun None 65. What is the name of the part marked as X in the underground (UG) cable? | Deselect Answer Bedding Armouring Lead sheath Paper insulation None 66. What is the purpose of ‘serving’ layer in underground cable? Deselect Answer Protect the cable from moisture Protect the cable from mechanical injury Protect metallic sheath against corrosion | Protect armouring from atmospheric condition None 67. Which type of fault of U.G Cable can be located by this loop test? Deselect Answer Ground fault Short circuit fault Open circuit fault Weak insulation fault None 68. Which cable laying method is used in generating station? Deselect Answer In ducts Racks in air Along buildings Direct in ground None 69. How many electrons are there in the valence shell of a copper atom? Deselect Answer 1 2 8 18 None 70. What is the effect of electric current on neon lamp? Deselect Answer Heating effect Magnetic effect Chemical effect Gas ionization effect None 71. What is the unit of insulation resistance? Deselect Answer Ohm Kilo ohm Milli ohm Mega ohm None 72. Which electrical device is the coarse excess current protection? Deselect Answer Cartridge fuses Rewirable fuses | Miniature Circuit Breaker (MCB) High Rupturing Capacity (HRC) Fuses None 73. Which type of joint is used for extending the length of conductor in over head lines? Deselect Answer Scarfed joint Aerial tap joint Britannia T joint Western Union joint None 74. Which type of soldering flux is used for soldering aluminium conductors? Deselect Answer Tallow Ker-al-lite Zinc chloride Sal ammonia rosin None 75. What is the effect on molten solder due to repeated melting? Deselect Answer Tin content reduced Lead content reduced Prevent slug formation Uneven flowing in joints None 76. What will happen to PVC insulation in cable carries excess current continuously for long period? Deselect Answer Voltage drop increases Voltage drop decreases Insulation resistance increases Insulation resistance decreases None 77. Which method of cable laying is suitable for congested areas? Deselect Answer Racks in air Duct pipes Along buildings Direct in ground None 78. What is the name of the part marked X in UG cables? Deselect Answer Serving Bedding Armouring Lead sheathv None 79. What is the fault of U.G cable identified in the circuit? Deselect Answer Ground fault Short circuit fault Open circuit fault Weak insulation fault None 80. Which part of the underground cable is protecting the metallic sheath against corrosion? Deselect Answer Serving Bedding Armouring Lead sheath None 81. Why the soldering iron must be kept into a stand that not in use while soldering? Deselect Answer It prevents burns and fire To control the excessive heat To save the time of soldering process To save the operator from electric shock None 82. Which type of wire joint is found in the junction box? Deselect Answer Aerial tap joint Plain tap joint Rat tail joint Married joint None 83. What is the name of the joint? Deselect Answer Married joint Scarfed joint Western union joint Britannia straight joint None 84. Deselect Answer None 85. What is the use of Britannia T joint? Deselect Answer Extending the length of the lines Inside and outside wiring installation Mechanical stress not required on conductor Tapping the service connection from overhead lines | None 86. Which type of soldering method is used for servicing and repairing work? Deselect Answer Dip soldering Soldering with a flame Soldering with soldering gun Soldering with a soldering iron None 87. What is the use of dip soldering method? | Deselect Answer Soft soldering Piping and cable soldering work Soldering miniature components on PCB Soldering sensitive electric component None 88. Name the part marked X of belted U.G cable Deselect Answer Jute filling Armouring Lead sheath Paper insulation None 89. Which insulating material is used as hot pouring compound for making joints in underground cable? Deselect Answer Polyamine hardener Cast resin compound Bituminous compound Epoxy cast resin compound None 90. What is the purpose of bedding insulation of U.G. cable? Deselect Answer Protect the cable from mechanical injury Protect the cable from moisture and gases Protect armouring from atmospheric condition Protect the metallic sheath against corrosion None 91. Which test is conducted to locate the faults in U.G. cables? Deselect Answer Loop test External growler test Break down voltage test Insulation resistance test None 92. What does the number 1.40 represent if a stranded conductor is designated as 7/1.40? Deselect Answer Area of cross section Radius of one conductor Diameter of all conductor Diameter of each conductor None 93. What is the value of electrical conductivity of aluminium conductor? Deselect Answer 61 mho/m 56 mho/m 35 mho/m 28 mho/m None 94. What is the rating factor of cable provided with coarse excess current protection? Deselect Answer 1.11 1.23 0.81 0.707 None 95. What is the size of neutral conductor compared to phase conductor in U.G cable? Deselect Answer Same size of phase conductor Half size of phase conductor 1/4 size of phase conductor 1/3 size of phase conductor None 96. What is the name of the tool? Deselect Answer Cutting plier Wire stripper Crimping tool Side cutting plier None 97. What is the reading of the micrometer? Deselect Answer 5.05 mm 5.00 mm 4.55 mm 4.05 mm None 98. Which method of soldering is used for repairing the vehicle body? Deselect Answer Dip soldering Soldering with flame Soldering with soldering iron Soldering with soldering gun None 99. What is the advantage of stranded conductor over solid conductor? Deselect Answer Cost is less More flexible Less voltage drop More insulation resistance None 100. What is the current capacity of the 16 Amp. Cable, if it is protected by coarse excess current protection? Deselect Answer 11 A 13 A 15 A 18 A None 101. What is the unit for Quantity of electricity? Deselect Answer Mho Coulomb Volt /second Ampere/second None 102. What is the name of the soldering method? Deselect Answer Dip soldering Soldering iron Soldering gun Soldering with flame None 103. What formula is used to find Electro Motive Force (EMF)? Deselect Answer EMF = Potential difference – voltage drop EMF = Potential difference + voltage drop EMF = Potential difference + voltage drop/2 EMF = Potential difference + 2 x voltage drop None 104. What is the current rating factor for close excess current protection of cable? Deselect Answer 0.81 0.92 1.23 1.5 None 105. What is the disadvantage of solid conductor compared to stranded conductor? Deselect Answer Less rigidity Less flexibility Low melting point Low mechanical strength None 106. What is the name of the soldering method? Deselect Answer Dip soldering Soldering with blow lamp Soldering with soldering gun Temperature controlled soldering None 107. What is the cause for cold solder defect in soldering? Deselect Answer Excessive heating Insufficient heating Incorrect use of solder High wattage soldering iron None 108. What happens to the voltmeter if it is connected as an ammeter? Deselect Answer Low reading No deflection Meter burns out Overshoot deflection None 109. Which is the example for coarse excess current protection? Deselect Answer MCB MCCB H.R.C fuses Rewireable type fuse unit None 110. Which conductors are used for distribution lines? Deselect Answer Insulated conductors Insulated solid conductors Bare conductors Two core cable None 111. How many electrons are there in the third cell of the copper atom? Deselect Answer 8 13 18 29 None 112. Which is the semiconductor material? Deselect Answer Eureka Ebonite Manganin Germanium None 113. What is the indication of neon polarity indicator used for checking A.C. supply? Deselect Answer Both electrodes will glow Only one electrode will glow Both electrodes will be flickering One electrode will glow and another will be flickering None 114. Calculate the electrical energy in unit consumed by 500W lamp for 5 hours. Deselect Answer 0.5 unit 1.0 unit 1.5 unit 2.5 unit None 115. What is the value of hot resistance of a bulb rated as 100W/250V? Deselect Answer 31.25 ohm 62.50 ohm 312.50 ohm 625.00 ohm None 116. Which law states that in closed electric circuit, the applied voltage is equal to the sum of the voltage drops? Deselect Answer Ohm’s law Laws of resistance Kirchhoff’s first law Kirchhoff’s second law None 117. Calculate the total power of the circuit of two lamps rated as 200W/240V are connected in series across 240V supply? | Deselect Answer 50 W 100 W 200 W 400 W None 118. What is the formula for the equivalent resistance (RT) of the three resistors R1, R2 & R3 are connected in parallel circuit? Deselect Answer None 119. What is the reading of ohmmeter across opened ‘R2’ resistor? Deselect Answer Indicate zero reading Indicate infinite resistance Total resistance value of the circuit Value of sum of the resistance of R1 and R3 only None 120. What is the change of resistance value of the conductor as its diameter is doubled? Deselect Answer Increases to two times Decreases to four times Decrease to half of the value No change in value of resistance None 121. What is the name of the resistor? Deselect Answer Metal film resistor Wire wound resistor Carbon – film resistor Carbon composition resistor None 122. Why the ohmmeter is graduated with nonlinear scale? Deselect Answer Voltage is directly proportional to resistance Current is inversely proportional to resistance Resistance is inversely proportional to the square of current Voltage is directly proportional to the square of the current None 123. Calculate the value of unknown resistance ‘RDC’ in the Wheatstone bridge network, If PAB = 500W, QBC = 300W, SAo = 15W, at balanced condition. Deselect Answer 12 ohm 9 ohm 6ohm 3 ohm None 124. Which material is having negative temperature co-efficient property? Deselect Answer Mica Eureka Copper Manganin None 125. What electrical quantities are related in Ohm’s law? Deselect Answer Current, resistance and power Current, voltage and resistivity Current, voltage and resistance Voltage, resistance and current density None 126. Calculate the value of resistance ‘R2’ in the parallel circuit. Deselect Answer 2 ohm 4 ohm 6 0hm 8 ohm None 127. Calculate the value of resistance ‘R2’ in the parallel circuit. Deselect Answer Current will remain same Whole circuit will not function No current will flow in that branch Voltage drop increase in the opened branch None 128. What is the unit of resistivity? Deselect Answer ohm / cm ohm / cm sq ohm - metre ohm / metre None 129. Which type of resistor is used for Arc quenching protection in circuit breakers? Deselect Answer Varistors Sensistors Thermistors Light dependent resistor (LDR) None 130. Calculate the value of resistance by colour coding method. Deselect Answer 22 x 10^3 ± 10% 23 x 10^4 ± 10% 25 x 10^3 ± 5% 36 x 10^4 ± 5% None 131. What is the reading of the voltmeter V? Deselect Answer 0 V 6 V 9V 18 V None 132. Which is the application of series circuit? Deselect Answer Voltmeter connection Lighting circuits in home Shunt resistor in ammeter Multiplier resistor of a voltmeter None 133. What is the effect on opened resistor in series circuit? Deselect Answer No effect in opened resistor Full circuit current will flow in opened resistor Total supply voltage will appear across the opened resistor No voltage will appear across the opened resistor None 134. Calculate the resistance value in R3 resistor Deselect Answer 4 Ohm 6 Ohm 8 Ohm 12 Ohm None 135. What is the effect of the circuit, if ‘ab’ points are shorted? Deselect Answer Circuit resistance will be zero Same current will flow in all branches Supply voltage will exist in each branch Total circuit current is equal to each branch circuit current None 136. What is the name of the resistor if its resistance value increase with increase in temperature? Deselect Answer Varistors Sensistors Thermistors Light Dependent Resistor (LDR) None 137. What is the formula for Quantity of electricity (Q)? Deselect Answer Current x Time Voltage x Current Current x Resistance Voltage x Resistance None 138. What is the unit of conductance? Deselect Answer Mho Ohm Ohm-m Ohm/m None 139. Which one defines the change in resistance in Ohm(Ω) per degree centigrade (°C)? Deselect Answer Temperature effect Laws of temperature Temperature constant Temperature co-efficient None 140. Which type of meter is used to test the polarity of battery? Deselect Answer Moving iron ammeter Moving coil voltmeter Moving iron voltmeter Dynamo meter type wattmeter None 141. What is the voltage drop in resistor ‘R2’ in the series circuit? Deselect Answer 5 volt 10 volt 15 volt 20 volt None 142. Which is the application of series circuit? Deselect Answer Fuse in circuit Voltmeter connection Electrical lamp in homes Shunt resistor in ammeter None 143. Which method is used for measuring 1 Ohm to 100K Ohm range resistance? Deselect Answer Substitution method Kelvin bridge method Wheat stone bridge method Voltmeter and ammeter method None 144. What is the S.I unit of specific resistance? Deselect Answer Ohm/cm Ohm/metre sq Ohm-metre Micro ohm/cm sq None 145. What is the value of resistance of the resistor? Deselect Answer 330 ± 5% Ohm 3300 ± 10% Ohm 33000 ± 5 % Ohm 330000 ± 10% Ohm None 146. What is the purpose of the shunt resistor ‘R2’ used in series type Ohm meter circuit? Deselect Answer To limit the current in the circuit To increase the value of meter resistance To adjust the zero position of the pointer To prevent the excess current in the circuit None 147. Which electrical quantity affects the heat generated in a conductor? Deselect Answer Voltage Square of the current Square of the resistance None 148. What is the change in value of resistance of the conductor, if its cross section area is doubled? Deselect Answer No change Decreases 2 times Increases 2 times None 149. Calculate the voltage drop across the resistor ‘R4’ in the circuit? Deselect Answer 48 V 72 V 80 V 100 V None 150. What is the resistance of Light Dependent Resistor (LDR), if the intensity of light is increased? Deselect Answer Increases Decreases Remains same Becomes infinity None 151. Which formula is used to calculate the power of a DC circuit? Deselect Answer Voltage x time Current x voltage Current x resistance Voltage x resistance None 152. Calculate the hot resistance of 200W / 250V rated lamp. Deselect Answer 31.25 ohm 62.5 ohm 312.5 ohm 625 ohm None 153. What is the value of resistance in an open circuit? Deselect Answer Zero Low High Infinity None 154. hich resistor the lowest current flows in a parallel circuit having the values of 50 ohm, 220 ohm, 450 ohm and 560 ohm connected with supply? Deselect Answer 50 ohm 220 ohm 450 ohm 560 ohm None 155. What is the specific resistance value of copper conductor? Deselect Answer 1.72 Ohm/cm3 1.72 Micro ohm 1.72 Micro ohm/cm^3 1.72 Micro ohm/m None 156. Which is inversely proportional to the resistance of a conductor? Deselect Answer Length Resistivity Temperature Area of cross section None 157. Calculate the total capacitance value in the circuit. Deselect Answer 0.16 µF 6 µF 30 µF 70 µF None 158. What is the unit of capacitance? Deselect Answer Mho Henry Farad Coulomb None 159. What is the capacitance value of a capacitor that requires 0.5 coulomb to charge to 35 volt? Deselect Answer 0.014 F 0.025 F 0.14 F 0.25 F None 160. How the value of capacitance can be decreased? Deselect Answer Increasing the plate area Increasing the resistance of the plates Increasing the distance between the plates Using high dielectric constant material None 161. Which is the diamagnetic substance? Deselect Answer Air Steel Water Platinum None 162. Which factor affects the polarity of the electromagnet? Deselect Answer Length of the coil | Direction of current Strength of current Strength of the magnetic field None 163. What is the unit of Magneto Motive Force (MMF)? Deselect Answer Ampere / m sq Ampere - m Ampere - turns Ampere / turns None 164. What is the unit of permeance? Deselect Answer Ampere - turns Weber/Ampere turns Ampere turns/Weber Weber/Square metre None 165. Which rule is applied to find the direction of magnetic fields in a solenoid coil? Deselect Answer Cork screw rule Right hand palm rule Flemings left hand rule Flemings right hand rule None 166. Calculate the total value of capacitance of series capacitor circuit. Deselect Answer 4µfd 10µfd 15µfd 40µfd None 167. What precaution to be taken before connecting the different voltage rating capacitors in series? Deselect Answer All the capacitors must be same manufacturer Each capacitors voltage drop must be less than its voltage rating Total capacitors value must be less than the lowest value of capacitor Break down voltage of each capacitor must be same None 168. Which material is the paramagnetic substance? Deselect Answer Cleat wiring Copper Bismuth Graphite None 169. What is the part marked as X in B.H curve? Deselect Answer Coercivity Saturation point Magnetizing force Residual magnetism None 170. What is the similar term in magnetic circuit for “conductance” in electrical circuit? Deselect Answer Reluctivity Permeance Reluctance Permeability None 171. What is the unit of Reluctance? Deselect Answer Weber / metre sq Weber / metre Ampere turns / Weber Ampere turns / metre sq None 172. Which is the correct expression of capacitance C if the electric charge is Q and the voltage is V? Deselect Answer C = Q/V C = V/Q C = VQ C = √VQ None 173. How can you increase the pulling strength of an electromagnet? | Deselect Answer Increase the field intensity Reduce the current in the coil Reduce the number of turns in the coil Increase the B-H curve of the materia None 174. Which defines the flux density is always lagging behind the magnetising force? Deselect Answer Hysteresis Magnetic intensity Magnetic induction Residual magnetism None 175. What is the effect on surrounding metal placed in a magnetic field? Deselect Answer Hysteresis Skin effec Eddy current Dielectric stress None 176. n which device the air capacitors are used? Deselect Answer TV tuner Oscillator Loudspeaker Radio receiver None 177. What will happen, if the polarized electrolytic capacitor is reversely connected? Deselect Answer No effect on the capacitor Explode due to excessive heat Current is reduced in the circuit Value of capacitance will be increased None 178. Which is the diamagnetic substance? Deselect Answer Wood Nickel Platinum Manganese None 179. What is the S.I unit of Flux density? Deselect Answer Tesla Weber Weber/metre Ampere-turns None 180. What indicates the shape of a BH curve (Hysteresis loop) of material? Deselect Answer Reluctance of the material Field intensity of the substance Magnetic properties of the material Pulling power of the magnetic material None 181. Which electrical quantity is directly proportional to the eddy current? Deselect Answer Voltage Current Frequency Resistance None 182. Which is the cause for changing the permeability? Deselect Answer Length Flux density Field intensity Magneto motive force None 183. Which type of capacitor is used for space electronics? Deselect Answer Plastic film type Ceramic disc type Electrolytic-Aluminum type Electrolytic-Tantalum type None 184. What is the effect of the electrolytic capacitor, if open circuit fault occurs? Deselect Answer It will not function It will burst at once It will become leaky It will function normally None 185. What will be the change in value of capacitance if the distance of the plates are decreased in the capacitor? Deselect Answer Becomes zero Remains same Decreases Increases None 186. Which property of magnet is illustrated? Deselect Answer Directive property Induction property Saturation property Poles existing property None 187. Which is a paramagnetic substance? Deselect Answer Air Steel Glass Water None 188. Which method of magnetization is used to make commercial purpose permanent magnets? Deselect Answer Induction method Single touch method Double touch method Divided touch method None 189. What is the effect of inductance if the distance between the turns increases? Deselect Answer Increases Decreases Becomes zero Remains same None 190. What is the function of dielectric insulator in capacitor? Deselect Answer Increases the strength of capacitance Prevents any current flow between plates Protects from short circuit between the plates Helps to hold the charge in capacitor for long period None 191. Which factor is determining the value of capacitance in capacitor? Deselect Answer Area of the plates Shape of the plates Material of the plates Thickness of the plates None 192. Which type of capacitors are used in RF coupling circuit? Deselect Answer Tantalum Monolithic Electrolytic Metalized poly propylene None 193. What is the unit of susceptance? Deselect Answer Mho Ohm Henry Farad None 194. What is the unit of susceptance? Deselect Answer Mho Ohm Henry Farad None 195. What is the resistance of the inductive coil takes 5A current across 240V, 50Hz supply at 0.8 power factor? | Deselect Answer 48 Ω 42.5 Ω 38.4 Ω 26.6 Ω None 196. How the resonance frequency (fr) can be increased in A.C series circuit? Deselect Answer Increasing the inductance value Reducing the capacitance value Increasing the capacitance value Increasing the value of resistance None 197. What is the main cause for below 0.5 lagging power factor in 3 phase system? Deselect Answer Due to fluctuation of voltage True power due to resistive load Reactive power due to more inductive load Reactive power due to more capacitive load None 198. What is the current in neutral conductor in 3 phase unbalanced load in star connected system? Deselect Answer No current will flow The algebraic sum of current in 3 phases The algebraic sum of current in 2 phases only Lesser than the lowest current in any one of the phases None 199. Calculate the apparent power in KVA of 3 phase 415V, 50 Hz, star system, if the line current (IL) is 16A at 0.8 power factor. Deselect Answer 15.2 KVA 11.5 KVA 9.2 KVA 5.3 KVA None 200. What will be the readings of two watt meters (W1& W2) in 3 phase power measurement, if the power factor is zero? Deselect Answer W1 & W2 both are positive reading W1 is Positive and W2 is negative reading W1 is equal to W2 but with opposite signs Zero W1 is Positive reading, and W2 is negative reading None 201. What is the maximum value of voltage for 240 volt RMS? Deselect Answer 240V 415V 339.5V 376.8V None 202. What is the formula for Reactive Power (Pr) in an AC circuit? Deselect Answer Pr = VI Pr = √2 VI Pr = VI cos θ Pr = VI sin θ None 203. Calculate the impedance of the circuit R = 5Ω, XL= 36Ω and XC = 24 Ω Deselect Answer 69 Ω 65 Ω 13 Ω 12 Ω None 204. What is the phase displacement in a single phase AC circuit? Deselect Answer 90° 120° 180° 270° None 205. What is the relation between the line voltage (VL) and phase voltage (Vp) in star connected system? Deselect Answer None 206. Calculate the line current of the 3 phase 415V 50 HZ supply for the balanced load of 3000 watt at 0.8 power factor is connected in star. Deselect Answer 8.5 A 5.2 A 4.5 A 3.4 A None 207. Calculate the power factor of coil having resistance of 24Ω, draws the current of 5A, at 240V/ 50HZ AC supply. Deselect Answer 0.8 0.6 0.5 0.3 None 208. Calculate the power factor of R.L.C circuit having resistance (R) = 15W, resultant reactance (X) = 20W connected across 240V /50Hz AC supply? Deselect Answer 0.5 0.6 0.7 0.8 None 209. Calculate the value admittance (Y) of the RLC parallel circuit connected across 240volts/50Hz AC supply and 8 Amp. Current is passed through it ? Deselect Answer 3.33 Mho 0.33 Mho 0.033 Mho 0.003 Mho None 210. What is the formula to calculate the line current (IL) of this single phase R - C parallel circuit? Deselect Answer None 211. How the low power factor (P.F) can be improved in AC circuits? Deselect Answer By connecting resistors in series By connecting capacitors in series By connecting inductors in series By connecting capacitors in parallel None 212. What is the relation between the line current (IL) and phase current (IP) in delta connected system? Deselect Answer None 213. What is the purpose of phase sequence meter? Deselect Answer To control the speed of 3 phase motor To protect motor against short circuit fault To indicate the incorrect phase sequence of 3 phase To ensure the correct phase sequence of 3 phase system None 214. Calculate the apparent power of a star connected 3 phase load, if it is connected across 3 phase 415volt/50Hz supply at 0.8 p.f and the phase current is 10 Amps. Deselect Answer 12.45 KVA 57.50 KVA 3.320 KVA 7.188 KVA None 215. What is the P.F if one of the wattmeters reading is zero and the other reads total power in 2 wattmeter method of 3 phase power measurement? Deselect Answer 0.5 Zero Unity Below 0.5 None 216. Which electrical term is defined as the total opposition to current in AC parallel circuit? Deselect Answer Resistance Impedance Admittance Susceptance None 217. Which AC circuit contains the phase relation between voltage (V) and current (I)? Deselect Answer Pure resistive circuit Resistance and inductance circuit Resistance and capacitance circuit Resistance, inductance and capacitance circuit None 218. In a 3 phase system, if the active power is 4 kw and the apparent power is 5 KVA, calculate the reactive power? Deselect Answer 1 KVAR 2 KVAR 3 KVAR 4 KVAR None 219. In which condition resonance will occur in R-LC series circuit? Deselect Answer Inductive reactance (XL) is zero Inductive reactance (XL) is equal to capacitive reactance (XC) Inductive reactance (XL) is greater than capacitive reactance (XC) Inductive reactance (XL) is less than capacitive reactance (XC) None 220. How will you obtain positive reading in the wattmeter reads negative reading during 3- phase two wattmeter method? Deselect Answer By interchanging the connections of input terminals By disconnecting the connection of current coil in meter By reversing the connection of pressure coil in meter By reversing the pressure coil and current coil connection in meter None 221. What is the form factor (Kf) for sinusoidal AC? Deselect Answer 1 1.11 2.22 4.44 None 222. What is the reciprocal of inductance in AC parallel circuit? Deselect Answer Reactance Admittance Conductance Susceptance None 223. What relationship is illustrated in between the current and voltage? Deselect Answer Current and voltage are “in phase” Current and voltage are in out of phase Current lags behind the voltage Current leads ahead of the voltage None 224. Calculate the total power by two wattmeter (W1 & W2) method, if one of the wattmeter (W2) reading is taken after reversing. Deselect Answer W1 x 2 W1 only W1 - W2 W1 + W2 None 225. In which 3 phase system, the artificial neutral is required to measure the phase voltage? Deselect Answer 3 wire star connected system 4 wire star connected system 3 wire delta connected system 4 wire delta connected system None 226. What is the line voltage in 3 phase system if the phase voltage is 240V? Deselect Answer 380 Volt 400 Volt 415 Volt 440 Volt None 227. Which formula is used to calculate Form factor (Kf)? Deselect Answer effective value / average value average value /effective value effective value/maximum value average value/maximum value None 228. What is the power factor if one of the wattmeter gives negative reading in two wattmeter method of 3 phase power measurement? Deselect Answer 0 0.5 Unity Less than 0.5 None 229. What is the phase displacement between phases in a 3-phase circuit? | Deselect Answer 90° 120° 180° 360° None 230. Which quantity is rotating at a constant angular velocity? Deselect Answer Scalar quantity Vector quantity Phasor quantity Algebraic quantity None 231. An accident is Deselect Answer unplanned event non-controlled event undesirable event all of the above None 232. Which one of the following is not the cost due to an accident? Deselect Answer Cost due to damage to machine, tools, material and property Cost of lost time of the injured person Cost of compensation and medical aid Cost due to increase in production None 233. The safe way of working is Deselect Answer ) an effective and right way of working ancient way of working a way of handling the work in a hurry a way of normal working None 234. he best way of avoiding accident is by Deselect Answer doing work in ancient way doing work in one's own way observing safety rules related to job. machine and workplace using safety equipment 5. In case of an accident, the victim should immediately be None 235. In case of an accident, the victim should immediately be Deselect Answer asked to take rest enquired about the accident attended to immediately left to himself without treatment. None 236. An oily floor should be cleaned by Deselect Answer cotton waste putting water putting saw spraying carbon dioxide or sand None 237. Fire is a combination of Deselect Answer fuel, light and oxygen uel, heat and oxygen fuel, heat and carbon dioxide fuel, light and nitrogen None 238. Burning wood is classed as which type, of fire? Deselect Answer Class A Class B Class C Class D None 239. On finding a fire in a building carpenter's first action should be a Deselect Answer Raise an alarm Fight the fire Leave the building Carry on working None 240. Which of the following should not be kept in a first-aid kit? Deselect Answer Sterile dressings Plasters Eye dressing Headache tablets None 241. Deselect Answer None 242. Which type of transformer is used for high frequency application? Deselect Answer Ring core transformer Ferrite core transformer Silicon steel core transformer Grain oriented core transformer None 243. What is the relationship between primary voltage (E1, V1) and secondary voltage (E2, V2) in a ideal transformer? Deselect Answer E1= V1 and E2 = V2 E1 > V1 and E2 > V2 E1 < V1 and E2 < V2 E1 = V2 and E2 = V1 None 244. What is the function of conservator in transformer? Deselect Answer Prevents the moisture entry Transfers the heat to atmosphere Allows to release internal pressure Allows expansion of oil level due to load variation None 245. Which loss of transformer is determined by short circuit test? Deselect Answer Copper loss Windage loss Hysteresis loss Eddy current loss None 246. Calculate the voltage regulation in percentage of the transformer if the no load voltage is 240 volt and full load voltage is 220 volt? Deselect Answer 7.2 % 8.3 % 8.71% 9.09% None 247. What is the purpose of using laminated core in transformer? Deselect Answer Reduce copper loss Reduce hysteresis loss Reduce mechanical loss Reduce eddy current loss None 248. What is the cooling method of transformer? Deselect Answer Oil natural cooling Oil natural air forced cooling Oil forced air forced cooling Oil natural water forced cooling None 249. What is the condition for obtaining maximum efficiency from transformer? Deselect Answer Copper loss > Iron loss Copper loss < Iron loss Copper loss = Iron loss Copper loss =Eddy current loss None 250. What is the function of top float switch of buchholz relay in transformer? Deselect Answer Activate in moisture presence Activate at overloading condition Activate at open circuit condition Activate at high temperature condition None 251. Why the core of current transformer is having low reactance and low core losses? Deselect Answer To minimise the burden To maintain constant output To prevent high static shield To minimise the error in reading None 252. How the error in reading of a potential transformer can be reduced? Deselect Answer Using thin laminated core Providing long magnetic path Using high flux density material Providing good quality core material None 253. Deselect Answer None 254. Why the load is disconnected before the OFF load tap changing operation? Deselect Answer To disconnect the tappings from neutral point To disconnect the moving contact of the diverter To avoid heavy sparking at the contact points To provide an electrical isolation for the windings None 255. What is the name of the part in power transformer? Deselect Answer Breather Tap charger Explosion vent Buchholz relay None 256. Which condition is absolutely essential for parallel operation of two transformers? Deselect Answer Nature of load Type of cooling Phase sequence Class of insulation used None 257. Which construction technique is used to reduce copper loss in larger transformers? Deselect Answer Use of laminated core By reducing core thickness By using grain oriented core Use stepped core arrangement None 258. What is the name of transformer? | Deselect Answer Air core transformer Iron core transformer Ring core transformer Ferrite core transformer None 259. Which transformer is used to measure high voltage installations? Deselect Answer Pulse transformers Ignition transformers Potential transformers Constant voltage transformers None 260. How does the moisture is controlled in breather fitted on power transformers? Deselect Answer Using silica gel | Using transformer oil Using sodium chloride Using ammonium jelly None 261. Deselect Answer None 262. Which power loss is assessed by open-circuit test on transformer? Deselect Answer Hysteresis loss only Eddy current loss only Copper loss Core loss None 263. Which is determined by the crackle test of transformer oil? | Deselect Answer Acidity Moisture Viscosity Dielectric strength None 264. Which material is used to make core of power transformer? Deselect Answer Soft iron Rolled steel Copper alloy Cold rolled grain oriented None 265. What is the name of transformer? Deselect Answer Auto transformer Core type transformer Shell type transformer Audio frequency transformer None 266. What is the purpose of providing explosion vent in a power transformer? Deselect Answer Air releasing Heat releasing Pressure releasing Moisture releasing None 267. What is the function of buchholz relay in power transformer? Deselect Answer Protection from high temperature Protection from moisture entering in oil Protection from pressure loading in tank Protection from both overloading and short circuit None 268. Why primary of potential transformer is wound with thin wire and large number of turns? Deselect Answer To offer high inductance To obtain required voltage ratio To regulate the primary current To stabilise input and output voltage None 269. Why distribution transformers are normally connected as primary in delta and secondary in star? | Deselect Answer To avoid overloading To maintain constant voltage To reduce transformer losses To easy distribution of 3 phase 4 wire system None 270. Which type of emf is induced in an ideal two winding transformer? Deselect Answer Self induced emf Mutually induced emf Statically induced emf Dynamically induced emf None 271. How to determine copper loss in a transformer? Deselect Answer Ratio test Impulse test Short circuit test Open circuit test None 272. Why ferrite core is used in radio receivers? Deselect Answer To reduce the constant losses To reduce electric interference To increase the quality of sound To increase the efficiency of receivers None 273. What is the advantage of stepped core arrangement in larger transformers? Deselect Answer Minimizes copper use Reduces hysteresis loss Reduces eddy current loss Reduces the space for core None 274. Which material is used in breather to prevent moisture entering in the transformer oil? Deselect Answer Silica gel Sodium chloride Ammonium chloride Charcoal and salt mixture None 275. What is the disadvantage of auto transformer? Deselect Answer More losses Heavier in weight Poor voltage regulation Cannot isolate the secondary winding None 276. What is the name of the safety sign? Deselect Answer warning sign Mandatory sign Prohibition sign Information sign None 277. Which is the physical hazard? Deselect Answer Smoking Vibration Corrosive Radioactive None 278. What is smothering in extinguishing of fire? Deselect Answer Adding the fuel element to the fire Removing the fuel element from the fire Using of water to lower the temperature Isolating the fire from the supply of oxygen None 279. Which is the correct sequence of operation to be performed when using the fire extinguisher? Deselect Answer Pull, Aim, Squeeze, Sweep Pull, Aim, Sweep, Squeeze Push, Arrange, Squeeze, Sweep Push, Arrange, Sweep, sequence None 280. Which plier is used for making wire hooks and loops? Deselect Answer Flat nose plier Long nose plier Round nose plier Diagonal cutting plier None 281. What is the use of pincer? Deselect Answer Twisting the flexible wires Cutting small diameter of wires Extracting the pin nails from the wood Holding small objects, where finger cannot reach None 282. What is the name of a road safety sign? Deselect Answer Mandatory sign Cautionary sign Informatory sign Prohibition sign None 283. What is the background colour of warning signs in the basic category? Deselect Answer Blue White Yellow Green None 284. Which type of fire extinguisher is used for fire on electrical equipment? Deselect Answer Halon type Foam type Gas cartridge type Stored pressure type None 285. Which Personal Protective Equipment (PPE) is used for the protection from fumes? Deselect Answer Apron Goggles Ear mask Nose mask None 286. What is the full form of BIS? Deselect Answer Board of Indian Standard Bureau of Indian Standard Board of International Standard Bureau of International Standard None 287. Which method is used to lift and move heavy loads? Deselect Answer Winches Crane and slings Layers and Rollers Machine moving platforms None 288. What is starving in extinguishing fire? Deselect Answer Adding fuel to the fire | Using water to cool the fire Removing fuel element from the fire Preventing oxygen supply to the fire None 289. What is the name of PPE? Deselect Answer Nose mask Head shield Face shield Hand screen None 290. Which artificial respiration method is to be performed to the victim with injuries on the chest and belly? Deselect Answer Schafer's method Mouth to mouth method Mouth to nose method Nelson's arm-lift back pressure method None 291. Which type of occupational health hazard is cause for infection? Deselect Answer Electrical hazard Biological hazard Physiological hazard Psychological hazard None 292. What is the use of this tool? Deselect Answer Holding the hot substances Cutting and twisting the wires Extracting nails from the wood Loosening and tightening the bolts and nuts None 293. What is the name of the safety sign? Deselect Answer warning sign Mandatory sign Prohibition sign Information sign None 294. What will be first-aid to be given to stop the bleeding of the victim? Deselect Answer Applying ointment Keep the injured portion upward Covering the wound portion by dressing Applying pressure over the injured portion None 295. What is the name of the cautionary sign? Deselect Answer School Guarded Unguarded Pedestrian crossing None 296. What is the current carrying capacity of 32 amp.rated cable, if it is protected by the rewirable fuse? Deselect Answer 13 Amp | 16 Amp 26 Amp 39 Amp None 297. What is the possible range to measure the size of the wire in a Standard Wire Gauge (SWG)? | Deselect Answer 0-44 0-42 0-38 0-36 None 298. Deselect Answer None 299. What is the name of the wire joint? Deselect Answer Aerial tap joint Knotted tap joint Duplex cross tap joint Double cross tap joint None 300. Which type of soldering flux is used for soldering galvanised iron? Deselect Answer Rosin Zinc chloride Sal ammonia Hydrochloric acid None 301. Which method of soldering is used for quantity production and for tinning work? Deselect Answer Dip soldering Soldering with a flame Soldering with soldering iron Soldering with soldering gun None 302. What is the name of the part marked as ‘X’ in the underground (UG) cable? Deselect Answer Bedding Armouring Lead sheath Paper insulation None 303. What is the full form of XLPE Cable? Deselect Answer Cross Line PolyEthylene X ess Line Phase Earthing Cross Linked PolyEthylene Excess Length Paper and Ebonite None 304. Deselect Answer None 305. What is the purpose of 'serving' layers in underground cable? Deselect Answer Protect the cable from moisture Protect the cable from mechanical injury Protect metallic sheath against corrosion Protect armouring from atmospheric condition None 306. Deselect Answer None 307. Which type of fault of U.G Cable can be located by this loop test? Deselect Answer Close circuit fault Short circuit fault Open circuit fault Weak insulation fault None 308. How many electrons are there in the valence shell of a copper atom? Deselect Answer 1 2 8 18 None 309. What is the effect of electric current on neon lamp? Deselect Answer Heating effect Magnetic effect Chemical effect Gas ionization effect None 310. What is the unit of insulation resistance? Deselect Answer Ohm Kilo Ohm Milliohm Mega Ohm None 311. Which electrical device is the coarse excess current protection? Deselect Answer Cartridge fuses Rewirable fuses Miniature Circuit Breaker (MCB) High Rupturing Capacity (HRC) Fuses None 312. Which type of joint is used for extending the length of conductor in overhead lines? Deselect Answer Scarfed joint Aerial tap joint Britannia “T” joint Western Union joint None 313. Which type of soldering flux is used for soldering aluminium conductors? Deselect Answer Tallow Ker-al-lite Zinc chloride Sal ammoniac rosin None 314. Which method of cable laying is suitable for congested areas? Deselect Answer Racks in air Duct pipes Along buildings Direct in ground None 315. Which part of the underground cable is protecting the metallic sheath against corrosion? Deselect Answer Serving Bedding Armouring Lead sheath None 316. What will happen to PVC insulation in cable carries excess current continuously for a long period? Deselect Answer Voltage drop increases Voltage drop decreases Insulation resistance increases insulation resistance decreases None 317. What is the use of Britannia T joint? Deselect Answer Extending the length of the lines Inside and outside wiring installation Mechanical stress not required on conductor Tapping the service connection from overhead lines None 318. What is the name of the joint? Deselect Answer Married joint Scarfed joint western union joint Britannia straight joint None 319. What is the name of the tool? Deselect Answer cutting plier Wire stripper Crimping tool Side cutting plier None 320. Deselect Answer None 321. What is the reading of the micrometer? Deselect Answer 4.35mm 5.00mm 4.55mm 4.05mm None 322. Which method of soldering is used for repairing the vehicle body? Deselect Answer Dip soldering Soldering with flame Soldering with soldering iron Soldering with soldering gun None 323. What is the current capacity of the 16 Amp. Cable, if it is protected by coarse excess current protection? Deselect Answer 11A 13A 15A 18A None 324. What is the unit for Quantity of electricity? Deselect Answer Coulomb volt/second Ampere/second EMF None 325. What is the name of the soldering method? Deselect Answer Dip soldering Soldering iron Soldering gun Soldering with flame None 326. Which conductors are used for distribution lines? Deselect Answer Insulated conductors Insulated solid conductors Bare conductors Two core cable None 327. What happens to the voltmeter if it is connected as an ammeter? Deselect Answer Low reading No deflection Meter burns out Overshoot deflection None 328. What is the unit of capacitance? Deselect Answer Mho Henry Farad Coulomb None 329. What is the capacitance value of a capacitor that requires 0.5 coulomb to charge to 35 volt? Deselect Answer 0.014 F 0.025 F 0.14 F 0.25 F None 330. Which factor affects the polarity of the electromagnet? Deselect Answer Length of the coil Direction of current Strength of current Strength of the magnetic field None 331. How can the value of capacitance be decreased? Deselect Answer Increasing the plate area Increasing the resistance of the plates Increasing the distance between the plates Using high dielectric constant material None 332. Which is the diamagnetic substance? Deselect Answer Air Steel Water Platinum None 333. What is the unit of Magnetomotive Force (MMF)? Deselect Answer Ampere / M2 Ampere - M | Ampere - turns Ampere / turns None 334. What is the unit of permeance? Deselect Answer Ampere - turns Weber/Ampere turns Ampere turns/Weber Weber/Square meter None 335. Which rule is applied to find the direction of magnetic fields in a solenoid coil? Deselect Answer Cork screw rule Right hand palm rule Flemings left hand rule Flemings right hand rule None 336. What precaution to be taken before connecting the different voltage rating capacitors in series? Deselect Answer All the capacitors must be same manufacturer Each capacitors voltage drop must be less than its voltage rating Total capacitors value must be less than the lowest value of capacitor Break down voltage of each capacitor must be same None 337. Which material is the paramagnetic substance? Deselect Answer Cleat wiring | Copper Bismuth Graphite None 338. What is the part marked as X in the B.H curve? Deselect Answer Coercivity Saturation point Magnetizing force Residual magnetism None 339. What is the similar term in magnetic circuit for conductance in electrical circuit? Deselect Answer Reluctivity Permeance Reluctance Permeability None 340. What is the unit of Reluctance? Deselect Answer Weber / metre2 Weber / meter Ampere turns / Weber Ampere turns / metre2 None 341. Which is the correct expression of capacitance C if the electric charge is Q and the voltage is V? Deselect Answer C = Q/V C = V/Q C = VQ C = √VQ None 342. How can you increase the pulling strength of an electromagnet? Deselect Answer Increase the field intensity Reduce the current in the coil Reduce the number of turns in the coil Increase the B-H curve of the material None 343. Which defines the flux density is always lagging behind the magnetising force? Deselect Answer Hysteresis Magnetic intensity Magnetic induction Residual magnetism None 344. What is the effect on surrounding metal placed in a magnetic field? Deselect Answer Hysteresis Skin effect Eddy current Dielectric stress None 345. In which device the air capacitors are used? Deselect Answer TV tuner Oscillator Loudspeaker Radio receiver None 346. Which is the diamagnetic substance? Deselect Answer Wood Nickel Platinum Manganese None 347. What is the S.I unit of Flux density? Deselect Answer Tesla Weber Weber/meter Ampere-turns None 348. What indicates the shape of a BH curve (Hysteresis loop) of material? Deselect Answer Reluctance of the material Field intensity of the substance Magnetic properties of the material Pulling power of the magnetic material None 349. Which electrical quantity is directly proportional to the eddy current? | Deselect Answer Voltage Current Frequency Resistance None 350. Which is the cause for changing the permeability? Deselect Answer Length Flux density Field intensity Magneto motive force None 351. Which type of capacitor is used for space electronics? Deselect Answer Plastic film type Ceramic disc type Electrolytic-Aluminum type Electrolytic-Tantalum type None 352. What is the effect of the electrolytic capacitor, if open circuit fault occurs? Deselect Answer It will not function It will burst at once It will become leaky It will function normally None 353. What will be the change in value of capacitance if the distance of the plates are decreased in the capacitor? Deselect Answer Becomes zero Remains same Decreases Increases None 354. Which property of magnet is illustrated? Deselect Answer Directive property Induction property Saturation property Poles existing property None 355. Which is a paramagnetic substance? Deselect Answer Air Steel Glass Water None 356. What is the effect of inductance if the distance between the turns increases? Deselect Answer Increases Decreases Becomes zero Remains same None 357. Which factor is determining the value of capacitance in capacitor? Deselect Answer Area of the plates Shape of the plates Material of the plates Thickness of the plates None 358. Which type of capacitors are used in RF coupling circuits? Deselect Answer Tantalum Monolithic Electrolytic Metalized polypropylene None 359. What is the resistance of the inductive coil takes 5A current across 240V, 50Hz supply at 0.8 power factor? Deselect Answer 48 W 42.5 W 38.4 W 26.6 W None 360. What is the unit of susceptance? Deselect Answer Mho Ohm Henry Farad None 361. How the resonance frequency (fr) can be increased in A.C series circuit? Deselect Answer Increasing the inductance value Reducing the capacitance value Increasing the capacitance value Increasing the resistance value None 362. What is the main cause for below 0.5 lagging power factor in 3 phase system? Deselect Answer Due to fluctuation of voltage True power due to resistive load Reactive power due to more inductive load Reactive power due to more capacitive load None 363. What is the current in neutral conductor in 3 phase unbalanced load in star connected system? Deselect Answer No current will flow The algebraic sum of current in 3 phases The algebraic sum of current in 2 phases only Lesser than the lowest current in any one of the phases None 364. Calculate the apparent power in KVA of 3 phase 415V, 50 Hz, star system, if the line current (IL) is 16A at 0.8 power factor. Deselect Answer 15.2 KVA 11.5 KVA 9.2 KVA 5.3 KVA None 365. What is the maximum value of voltage for 240 volt RMS? Deselect Answer 240V 415V 339.5V 376.8V None 366. What will be the readings of two watt meters (W1& W2) in 3 phase power measurement, if the power factor is zero? Deselect Answer W1 & W2 both are positive reading W1 is Positive and W2 is negative reading W1 is equal to W2 but with opposite signs Zero W1 is Positive reading, and W2 is negative reading None 367. What is the formula for Reactive Power (Pr) in an AC circuit? Deselect Answer Pr = VI Pr = √2 VI Pr = VI cos θ Pr = VI sin θ None 368. Calculate the impedance of the circuit R = 5Ω, XL= 36Ω and XC = 24 Ω. Deselect Answer 69 Ω 65 Ω 13 Ω 12 Ω None 369. What is the phase displacement in a single phase AC circuit? Deselect Answer 90° 120° 180° 270° None 370. Calculate the line current of the 3 phase 415V 50 HZ supply for the balanced load of 3000 watt at 0.8 power factor is connected in star. Deselect Answer 8.5 A 5.2 A 4.5 A 3.4 A None 371. What is the power factor in a 3 phase power measurement of two wattmeters showing equal readings? Deselect Answer 0 1 0.5 0.8 None 372. Calculate the power factor of coil having resistance of 24Ω, draws the current of 5A, at 240V/ 50HZ AC supply. Deselect Answer 0.8 0.6 0.5 0.3 None 373. Calculate the power factor of R.L.C circuit having resistance (R) = 15W, resultant reactance (X) = 20W connected across 240V /50Hz AC supply? Deselect Answer 0.5 0.6 0.7 0.8 None 374. Calculate the value admittance (Y) of the RLC parallel circuit connected across 240 volts/50Hz AC supply and 8 Amp. Current is passed through it ? Deselect Answer 3.33 Mho 0.33 Mho 0.033 Mho 0.003 Mho None 375. How the low power factor (P.F) can be improved in AC circuits? Deselect Answer By connecting resistors in series By connecting capacitors in series By connecting inductors in series By connecting capacitors in parallel None 376. What is the relation between the line current (IL) and phase current (IP) in delta connected system? Deselect Answer IL = IP IL = 3 IP IL = √3 IP IL = IP / √3 None 377. Calculate the apparent power of a star connected 3 phase load, if it is connected across 3 phase 415 volt/50Hz supply at 0.8 p.f and the phase current is 10 Amps. Deselect Answer 12.45 KVA 57.50 KVA 3.320 KVA 7.188 KVA None 378. What is the purpose of phase sequence meter? Deselect Answer To control the speed of 3 phase motor To protect motor against short circuit fault To indicate the incorrect phase sequence of 3 phase To ensure the correct phase sequence of 3 phase system None 379. What is the P.F if one of the wattmeters reading is zero and the other reads total power in 2 wattmeter method of 3 phase power measurement? Deselect Answer 0.5 Zero Unity Below 0.5 None 380. What is the formula for form factor(Kf)? Deselect Answer Kf= Average value / RMS value Kf= RMS value / Average value Kf= Maximum value / Average value Kf= RMS value / Maximum value None 381. Which electrical term is defined as the total opposition to current in AC parallel circuit? Deselect Answer Resistance Impedance Admittance Susceptance None 382. Which AC circuit contains the phase relation between voltage (V) and current (I)? Deselect Answer Pure resistive circuit Resistance and inductance circuit Resistance and capacitance circuit Resistance, inductance and capacitance circuit None 383. In a 3 phase system, if the active power is 4kw and the apparent power is 5 KVA, calculate the reactive power? Deselect Answer 1 KVAR 2 KVAR 3 KVAR 4 KVAR None 384. In which condition resonance will occur in an RLC series circuit? Deselect Answer Inductive reactance (XL) is zero Inductive reactance (XL) is equal to capacitive reactance (XC) Inductive reactance (XL) is greater than capacitive reactance (XC) Inductive reactance (XL) is less than capacitive reactance (XC) None 385. How will you obtain positive reading in the wattmeter reads negative reading during 3- phase two wattmeter method? Deselect Answer By interchanging the connections of input terminals By disconnecting the connection of current coil in meter By reversing the connection of pressure coil in meter By reversing the connection of pressure coil in meter None 386. What is the form factor (Kf) for sinusoidal AC? | Deselect Answer 1 1.11 2.22 4.44 None 387. What is the reciprocal of inductance in AC parallel circuit? Deselect Answer Reactance Admittance Conductance Susceptance None 388. Calculate the total power by two wattmeter(W1 & W2) method, if one of the wattmeter (W2)reading is taken after reversing. Deselect Answer W1 x 2 W1 only W1 - W2 W1 + W2 None 389. Which 3 phase system, the artificial neutral is required to measure the phase voltage? Deselect Answer 3 wire star connected system 4 wire star connected system 3 wire delta connected system 4 wire delta connected system None 390. What is the line voltage in 3 phase system if the phase voltage is 240V? Deselect Answer 380 Volt 400 Volt 415 Volt 440 Volt None 391. What is the phase displacement between phases in a 3-phase circuit? Deselect Answer 90° 120° 180° 360° None 392. What is the power factor if one of the wattmeter gives negative reading in two wattmeter method of 3 phase power measurement? Deselect Answer 0 0.5 Unity Less than 0.5 None 393. Which condition is called as resonance RLC circuit? | Deselect Answer XL > XC XC > XL XL = XC R < XL None 394. Which device converts sunlight into electrical energy? Deselect Answer Photovoltaic cell Liquid crystal diode Light emitting diode Light dependent resistor None 395. Which law secondary cell works? Deselect Answer Lenz's law Joule's law Faradays laws of electrolysis Faraday's laws of electromagnetic induction None 396. What is the formula to calculate the Mass deposited during electrolysis? Deselect Answer M= it gm M= zit gm M= it/zgm M= z/it gm None 397. Deselect Answer None 398. How the capacity of batteries is specified? Deselect Answer Volt Watt volt Ampere Ampere hour None 399. What is the name of defect that bending of plates in secondary cells? Deselect Answer Buckling Local action Partial short Hard sulphation None 400. What is the unit of electric charge? Deselect Answer volt watt Ampere Coulomb None 401. What is the output voltage of lithium cell? Deselect Answer 1.2V 1.5V 1.8V 2.5V None 402. What is the method of charging if the battery is to be charged for short duration at higher rate? Deselect Answer Initial charge Boost charge Trickle charge Freshening charge None 403. Which electrolyte used in carbon zinc dry cells? Deselect Answer Dilute sulphuric acid Ammonium chloride Potassium hydroxide Concentrated hydrochloric acid None 404. Which effect causes by passing electric current in liquids? Deselect Answer Heating Lighting Magnetic Chemical None 405. Which material is used to make negative plates in lead acid battery? Deselect Answer Lead dioxide Sponge lead Lead peroxide Lead sulphate None 406. Which technique is used to control the corrosion of a metal surface? Deselect Answer Anodic protection Cathodic protection Electrolytic protection Electrostatic protection None 407. Which cell is most often used in digital watches? Deselect Answer voltaic Lithium Mercury Silver oxide None 408. What is the effect if one cell is connected with reverse polarity in a parallel combination circuit? Deselect Answer voltage become zero Become open circuit will get short circuited No effect will function normally None 409. What is the function of fine selector switch in battery charger? Deselect Answer Selection of current rating Selection of charging time Selection of voltage range Selection of charging method None 410. What is the effect on output power with respect to temperature in solar cells? Deselect Answer No effect on change in temperature Increases with increase in temperature Decreases with increase in temperature Decreases with decrease in temperature None 411. What purpose the hydrometer is used during charging of battery? Deselect Answer What purpose the hydrometer is used during charging of battery? Assess the battery voltage level Assess the discharge level of battery Determine the specific gravity of electrolyte None 412. What is the formula for Faraday's first law of electrolysis? Deselect Answer M=Z/it M = Zit M = it/ z M = Zt/i None 413. Which is used as an electrolyte in lead acid battery? Deselect Answer Hydrochloric acid Ammonium chloride Potassium hydroxide Diluted sulphuric acid None 414. What is the total voltage of the circuit? Deselect Answer 1.5 Volt 6.0 Volt 7.5 Volt 9.0 Volt None 415. What is the outcome at the positive plate, after the chemical reaction in lead acid battery during charging? Deselect Answer Sponge lead (Pb) Lead peroxide (Pbo2) Lead sulphate (Pbso4) Lead sulphate + water None 416. Why the vent plug is kept open during charging of a battery? Deselect Answer To escape the gas freely To allow oxygen enter inside To check the level of electrolyte To check the colour changes in the plates None 417. In which method the battery is charged at low current for long period? Deselect Answer Rectifier method Trickle charging method Constant current method Constant potential method None 418. How the hard sulfation defect in lead acid battery can be rectified? Deselect Answer Changing with new electrolyte Replacing with new electrodes Recharging the battery for a longer period at low current Recharging the battery for short period at high current None 419. which material is used as cathode (-ve) electrode in silver oxide battery? Deselect Answer Zinc Copper Carbon Silver oxide None 420. What is the Electro Chemical Equivalent (ECE) of silver? Deselect Answer 0.001182 mg/coulomb 0.01182 mg/coulomb 0.1182 mg/coulomb 1.1182 mg/coulomb None 421. What is the outcome of the chemical reaction that takes place in negative plate of lead acid battery during discharging? Deselect Answer Sponge lead (Pb) Lead peroxide (Pbo2) Lead sulphate(Pbso4) Lead sulphate + water None 422. What is the purpose of separator in lead acid battery? Deselect Answer To provide a path for electrolyte faced To hold the positive and negative plate firmly To avoid short in between the positive and negative plates To keep positive and negative plate in a sequence array None 423. Which instrument is used to measure the specific gravity of electrolyte in lead acid battery? Deselect Answer Barometer Hydrometer Anima meter High rate discharge tester None 424. Which type of inverter circuit? Deselect Answer Driven inverter SCR used inverter Single transistor inverter Two winding transformer inverter None 425. What is the effect of buckling defect in a lead acid battery? Deselect Answer Bending of the electrodes Reducing the strength of electrolyte Making short between the electrodes Increasing the internal resistance None 426. What is the total output voltage of the circuit? Deselect Answer 0 V 1.5 V 3.0 V 4.5 V None 427. How the conduit pipes are specified? Deselect Answer Length in meter wall thickness in mm Inner diameter in mm outer diameter in mm None 428. What is the fusing factor for rewireable fuse? Deselect Answer 1.1 1.4 2.1 2.5 None 429. What is the purpose of underwriter's knot for pendant holder connection? Deselect Answer Avoid loose connections Increase mechanical strength Prevent excessive cap cover pressure Reduce the strain from the terminals of accessories None 430. What is the type of fuse? Deselect Answer Knife edge cartridge fuse High rupturing capacity fuse Ferrule contact cartridge fuse Diazed screw type cartridge fuse None 431. What is the name of electrical accessory? Deselect Answer Bracket holder Edison screw type holder Angle swivel lamp holder Goliath Edison screw lamp holder None 432. What is the name of symbol used in wiring circuit? Deselect Answer Link Fuse Pull switch | Plug and socket None 433. Which type of load is protected by the L-series MCB? Deselect Answer Motors Geyser Hand tools Air conditioner None 434. Which type of switch is used in the circuit? Deselect Answer One-way switch Two-way switch Intermediate switch Multi position switch None 435. What is the effect of low current rated cable used to connect higher current load? Deselect Answer Voltage drop increases Load current increases voltage drop decreases Cable damage due to heat None 436. What is the name of the conduit accessory? Deselect Answer Solid bend Solid elbow Inspection Bend Inspection elbow None 437. How many two way switches with intermediate switch are used to control one lamp from three different places? Deselect Answer 1 2 3 4 None 438. What is the advantage of concealed wiring? Deselect Answer Easy to maintain Less voltage drop High insulation resistance Protection against moisture None 439. What is the name of the diagram? Deselect Answer Installation plan Layout diagram Circuit diagram None 440. What is the fusing factor for high rupturing capacity fuses (HRC)? Deselect Answer 1.0 1.1 1.4 1.7 None 441. Which type of relay can be operated at both A.C and D.C? Deselect Answer Ferred relay Thermal relay Impulse relay Dry reed relay None 442. What is the name of the accessory used in electrical appliances? Deselect Answer 2 Pin plug Three pin plug Iron connector with direct entry Flat connector with side entry None 443. What is the name of the accessory symbol? Deselect Answer Bell push switch Two way switch one way switch two poles Multi position switch single pole None 444. What is the purpose of the flexible cords in domestic wiring? Deselect Answer Concealed wiring Permanent connection Run cable through holes in ceiling Connection transportable appliances None 445. Which type of circuit breaker is used above 100 A current rating? Deselect Answer Miniature Circuit Breaker (MCB Earth Leakage Circuit Breaker (ELCB) Moulded Case Circuit Breaker (MCCB) Residual Current Circuit Breaker (RCCB) None 446. What is the purpose of tin coating on copper fuse wire? Deselect Answer Withstand high temperature Increase the fusing factor Prevent oxidation of copper wire Increase the mechanical strength None 447. What is the name of the four insulated conductors group? Deselect Answer Pair Core Quad Layer None 448. How many two way switches are required in godown wiring circuit to control four lamps Deselect Answer 2 3 4 5 None 449. Why tree system of wiring most suitable formultistoryed building? Deselect Answer Easy load balancing Constant voltage distribution offers minimum voltage drop Easy in fault finding with many fuses None 450. Which is used as a filler material for fixing screw hole on ceiling? Deselect Answer Paper Nylon cement Poly vinyl chloride | None 451. What is the symbol indicates? Deselect Answer Table fan Ceiling fan Bracket fan Exhaust fan None 452. What is the name of the relay? Deselect Answer Impulse relay Dry reed relay Electromagnetic relay Mercury wetted contact relay None 453. Where the Iron Clad Double Pole (ICDP) main switch is used? Deselect Answer Large industrial installations Control main or branch circuits Single phase domestic installations Three phase power circuit installations None 454. Which electrical accessory belongs to general classification of accessories? Deselect Answer Fuse Ceiling roses Intermediate switch Pendent lamp holder None 455. Which is the application of DC series MCB? Deselect Answer AC motor DC motor Locomotives Air conditioners None 456. What is the term for the time taken by a fuse to interrupt the circuit in fault? Deselect Answer Time factor Fusing factor Cut-off factor Fusing current None 457. Which place the Tree system of wiring is most suitable? Deselect Answer Godown wiring Industrial wiring Domestic wiring Multi storied building None 458. What is the maximum PVC conduit size tomake safe cold bending? Deselect Answer 12 mm 19 mm 25 mm 50 mm None 459. Why separate wiring is recommended for home theatre wiring and power wiring? Deselect Answer Avoid electrical fire Reduce power loss | Avoid electrical interference Maintain voltage level constant None 460. What is the tool used to bend conduits? Deselect Answer Hickey Coupler Pipe vice Bench vice None 461. What is the expansion of MCB? Deselect Answer Minute Control Breaker Miniature Circuit Breaker Minimum Current Breaker Maximum Current Breaker None 462. What is the purpose of ELCB? Deselect Answer Detects the fault in circuit Monitors the residual current Protects the equipment from over load Protects from short circuit fault None 463. What is the purpose of the fuse cut out provided at the incoming power supply? Deselect Answer To ensure the line is not over loaded To maintain the stabilised supply voltage To protect the circuit from the leakage current To protect the human beings from electric shock None 464. What is the use of die stock set? Deselect Answer Cut external threads on square pipe Cut internal threads on cylindrical pipe Cut external threads on cylindrical pipe Cut internal threads on rectangular pipe None 465. What is the purpose of the circuit diagram in wiring installation? Deselect Answer To show the physical position of accessories To estimate the various accessories in the circuit To inform the reader quickly what for the circuit is designed To show the schematic connection of the circuit for a specific task None 466. Which electrical equipment is provided with L series MCB? Deselect Answer General lighting Motors Air conditioner Halogen lamp None 467. Why the looping-back (loop in) method is preferred in domestic wiring installation? Deselect Answer Easy to identify the faults | No separate joints are used More number of tappings can be taken More number of sub-circuits can be made None 468. What is length of thread on rigid conduits as per BIS? Deselect Answer 9mm - 20mm 11mm - 27mm 13mm - 25mm 15mm - 30mm None 469. Which type of conduit used for gas tight explosive installation? Deselect Answer Flexible conduits Rigid steel conduits Rigid non-metallic conduits Flexible non-metallic conduits | None 470. What is the function of circuit breaker? Deselect Answer Making contact at normal condition Making contact at abnormal condition Breaking automatically at abnormal condition Physical breaking contact at abnormal condition None 471. What is the function of bimetallic strip in MCB Deselect Answer Overload protection Short circuit protection Over voltage protection Earth leakage protection None 472. What protection offered by residual current circuit breaker? Deselect Answer Protection from shock Protection from over load Protection from short circuit Protection from leakage current None 473. Which wiring is suitable for temporary installations? Deselect Answer cleat wiring Concealed wiring PVC conduit wiring Metal conduit wiring None 474. Where the phase conductor is looped in looping system of wiring? Deselect Answer Switch box Junction box Distribution box Socket connection None 475. What is the minimum size of Copper earth continuity conductor used in single phase domestic wiring as per BIS? Deselect Answer 3 Sq.mm 3.5 Sq.mm 2.5 Sq.mm 1.5 Sq.mm None 476. Which method is used to reduce earth resistance value in a existing earth? Deselect Answer Increasing the length of electrode Keeping wet condition in earth pits always Adding more sand and charcoal in earth pits Increasing the diameter of earth electrode None 477. Why A.C is required to measure the earth resistance by using earth resistance tester? Deselect Answer Regulate the current Increase the voltage drop Decrease the voltage drop Avoid electrolytic emf interference None 478. What is the formula to find voltage drop of a A.C single phase wiring circuit? Deselect Answer Voltage drop = IR volt Voltage drop = I2R volt Voltage drop = I/R volt Voltage drop=IR/2 volt None 479. What is the maximum permissible load for a power sub circuit as per l.E rules? Deselect Answer 800 Watt 1500 Watt 2000 Watt 3000 Watt None 480. Which location the service connection supply leads to be connected at consumer main board? | Deselect Answer IC cut out Main switch Energy meter Distribution board None 481. What is the type of test in domestic wiring installation? Deselect Answer Polarity test Continuity (or) open circuit test Insulation resistance test between conductors Insulation resistance test between conductors and earth None 482. What is the permissible leakage current in domestic wiring installation? Deselect Answer 1/5 x Full load current 1/50 x Full load current 1/500 x Full load current 1/5000 x Full load current None 483. Which formula is used to calculate the diversity factor? Deselect Answer Diversity Factor = Maximum Load/Installed Load Diversity Factor = Installed load/Minimum load Diversity Factor = Minimum actual load/Installed load Diversity Factor = Installed load/Minimum actual load None 484. Diversity Factor = Installed load/Minimum actual load Deselect Answer Multimeter Megger Shunt type ohmmeter Series type ohmmeter None 485. What is the type of test in the wiring installation? Deselect Answer Polarity test open circuit test Insulation resistance test between conductors Insulation resistance test between conductors and earth None 486. Where system earthing is done? Deselect Answer Generating station Electroplating installation Small industrial installation Domestic wiring installation None 487. What is the test to be carried out by using megger? Deselect Answer Polarity test Insulation resistance test Earth electrode resistance test Earth conductor continuity test None 488. What is the reason of lamp glowing dim and motor running slow in a domestic wiring circuit? Deselect Answer open circuit in the neutral line Short circuit between conductors High value series resistance fault open circuit in the earth conductor None 489. Which wiring installation the System earthing is to be done? Deselect Answer substations Godown wiring Domestic wiring Commercial wiring None 490. How to control harmonic distortions in neutral connections as per IE rule? Deselect Answer Earthing through impedance Providing by plate earthing Increasing conductor size Providing parallel earthing None 491. What is the function of current reverser in earth resistance tester? Deselect Answer Converts A.C. into D.C Reverses the polarity of D.C Changes D.C. supply into A.C supply Reverses the direction of rotation of the generator None 492. Which force is required to move the pointer from zero position in an indicating instrument? Deselect Answer Controlling force Deflecting force Air friction damping Eddy current damping None 493. Which is the position to use the instrument provided with gravity control? | Deselect Answer Any position Vertical position Inclined position Horizontal position None 494. What is the name of the scale? Deselect Answer Linear scale Coarse scale Extended scale Non-linear scale None 495. Which error is caused by the incorrect position of instrument reading? Deselect Answer Device error Human error Influence error Switching error None 496. Which instrument is used to measure one ohm and below one ohm resistance value accurately? Deselect Answer Megohm meter Multimeter (analog) Shunt type ohm meter Series type ohm meter None 497. What is the purpose of the 3rd terminal provided in a advanced megohm meter? Deselect Answer Copper Eureka Nichrome Manganin None 498. What is the name of the shunt resistance material? Deselect Answer Copper Eureka Nichrome Manganin None 499. What is the reason for the moving coil meter having uniform scale? Deselect Answer Deflecting torque is directly proportional to the current Deflecting torque is inversely proportional to the current Deflecting torque is inversely proportional to the square of the current Deflecting torque is directly proportional to the square of the current None 500. Which error if the energy meter disc rotating continuously on no load? Deselect Answer Speed error Phase error Friction error Creeping error None 501. What is the effect on CT if its secondary is kept open? Deselect Answer CT primary burns out Volt ampere capacity reduces Volt ampere capacity increases CT secondary winding burns out None 502. What is the purpose of variable resistor connected across shunt type ohm meter? Deselect Answer Avoid draining of battery Minimize the error in reading Adjust the current to safe value Adjust the pointer to zero adjustment None 503. Which material is used to make control spring in measuring instruments? Deselect Answer Steel Silver Tinned copper Phosphor bronze None 504. Which electrical effect that the single phase energy meter works? Deselect Answer Heating effect Induction effect Chemical effect Electrostatic effect None 505. Which position an instrument using fluid friction damping reads accurately? Deselect Answer Any position Vertical position only Inclined position only Horizontal position only None 506. What is the name of meter? Deselect Answer AC multirange ammeter DC multirange voltmeter AC and DC multirange ammeter AC and DC multirange voltmeter None 507. Which instrument is an example of an integrating instrument? Deselect Answer AC Voltmeter DC Voltmeter Energy meter Tangent galvanometer None 508. How the creeping error is controlled in energy meter? Deselect Answer By reducing rated voltage By increasing the inductive load By adjusting the brake magnet position By drilling two holes diametrically opposite on disc None 509. Why the scale of the moving iron instrument is having un-uniform scale? Deselect Answer Deflecting force is directly proportional to the Current Deflecting force is inversely proportional to the Current Deflection of force is directly proportional to the square of the current Deflection force is inversely proportional to the square of the current None 510. Which source of measuring error is caused by the effect of magnetic fields? Deselect Answer Device error Human error Influence error Switching error None 511. Which type of wattmeter? Deselect Answer Three element 4 wire wattmeter Two element 3 phase wattmeter Three element 3 phase wattmeter Three phase two element with C.T & P.T None 512. Which type of instrument is used with air friction damping? Deselect Answer Moving coil instrument Moving iron instrument Induction type instrument Dynamo meter type instrument None 513. Which type of energy meter works with netural connection? Deselect Answer Three phase two element Three phase three element Single phase single element Three phase two element with CT & PT None 514. What is the type of frequency meter? Deselect Answer Weston type Ratio meter type Electro dynamic type Mechanical resonance type None 515. What is the unit of sensitivity in instruments? Deselect Answer Volt/ohm Ohm/volt Ohm metre Ohm/metre None 516. Why two straight holes are provided in the aluminium disc in energy meter? Deselect Answer To reduce the disc weight For power factor correction To prevent the flux leakage To arrest the creeping error None 517. What is the name of the instrument? Deselect Answer Absolute instrument Indicating instrument Recording instrument Integrating instrument None 518. Why damping force is required in a moving coil instrument? Deselect Answer Makes the needle movement faster Helps the deflecting force to act fast Brings the needle to its zero position Brings the needle to its zero position None 519. What is the function of soft iron core in a moving coil instrument? Deselect Answer Strengthens the deflection force | Controls the needle's movement Provides meter with maximum sensitivity Provide uniform distribution of magnetic flux in air gap None 520. Which parameter is the cause for loading effect on measuring instruments? Deselect Answer Low accuracy High sensitivity Low sensitivity Low influence error None 521. Name the type of instrument. Deselect Answer Attraction type moving iron Repulsion type moving iron Permanent magnet moving coil Dynamo meter type moving coil None 522. Which meter is used to measure revolution per minute of a motor? Deselect Answer Tachometer Energy meter Ampere hour meter Centre zero ammeter None 523. How to identify the moving iron type instrument? Deselect Answer No terminal marking Terminal marked (+) only One terminal coloured red Terminal marked (+) and (-) None 524. Which is an absolute instrument? Deselect Answer Ammeter Volt meter Energy meter Tangent galvanometer None 525. Which force produces movement of pointer in an indicating instrument? Deselect Answer Damping force Deflecting force Repulsion force Controlling force None 526. What is the function of integrating instrument? Deselect Answer Displays the quantity Indicates the quantity Registers the quantity Measures the quantity None 527. Which position an instrument using gravity control reads accurately? Deselect Answer Any position Vertical position Inclined position Horizontal position None 528. Which quantity is measured by an electro dynamo type instrument? Deselect Answer Power Current voltage Resistance None 529. How to achieve maximum accuracy in measurement using analog instrument? Deselect Answer Keep low input impedance Keep high input impedance Use short connecting leads Provide correct damping system None 530. Which material is used to make heating element? Deselect Answer Silver Copper Nichrome Aluminium None 531. What is the function of stirrer motor in microwave oven? Deselect Answer Draws cooling air inside Spreads the heat uniformly Exhausts the hot air outside Revolves and reflects the electromagnetic energy None 532. What is the purpose of U bend marked as X in geyser? Deselect Answer Prevents draining of water Avoids the forming of scales Reduces the pressure of outlet pipe Restricts the air locking inside the tank None 533. Which type of A.C single phase motor is used in food mixer? Deselect Answer Universal motor Repulsion motor Split phase motor Shaded pole motor None 534. Which is the position for maximum output of the heater? Deselect Answer Position 1 Position 2 Position 3 Position 4 None 535. Which formula is used to calculate the heat generated as per Joules law? | Deselect Answer Heat generated = IRT / J cal Heat generated = |2RT /Jcal Heat generated = IR2T/Jcal Heat generated = (IR)2 T/Jcal None 536. Calculate the heat generated in a electric heater of 1000 watt, 240 volt, worked for 5 minutes? Deselect Answer 70.5 kilo calories 71.0 Kilo calories 71.6 Kilo calories 72.1 Kilo calories None 537. What is the purpose of protection grooves at various places in a heater base plate? Deselect Answer Radiate the heat properly Retain the heating element firmly Place the vessels firmly on heater plate Protect the heating element from damage None 538. What is the purpose of sole plate in electric kettle? Deselect Answer Acts as a balancing weight Acts as an insulator for element Protect the kettle base from damage Keep the element in close contact with container None 539. What is the magnetron tube filament voltage used in microwave oven? Deselect Answer 1.5 V A.C 2.0 V A.C 3.0V A.C 3.2V A.C None 540. What is the fault in a food mixer if it runs intermittently? Deselect Answer Worn out brushes Armature coil open Defective commutator Field winding partially short None 541. What is the defect in a single phase pump motor if it runs with slow speed? Deselect Answer Defective capacitor Open starting winding Short in starting winding Short in running winding None 542. What is the function of neutral path in AC supply system for appliances? Deselect Answer Provides current return path Provides level constant Reduces voltage drop in wiring Maintains load current constant None 543. What is the function of magnetron tube in a microwave oven? Deselect Answer Amplifies the microwave signal Changes the polarity every half cycle Oscillate and produce cooking frequency Converts microwave energy to electrical energy None 544. Which type of motor is used in the wet grinder? Deselect Answer Universal motor Repulsion motor Capacitor start induction run motor Capacitor start capacitor run motor None 545. What is the name of the circuit? Deselect Answer Electronic fan regulator Electronic voltage multiplier Electronic voltage stabilizer Electronic triggering circuit of SCR None 546. What is the function of conservator in transformer? Deselect Answer Prevents the moisture entry Transfers the heat to atmosphere Allows to release internal pressure Allows expansion of oil level due to load variation None 547. What is the purpose of tap changing in power transformers? Deselect Answer Change voltage ratio in distribution Change voltage ratio in distribution Maintain secondary voltage constant Load the transformer for maximum efficiency None 548. What is the name of the safety sign? Deselect Answer Warning sign Mandatory sign Prohibition sign Information sign None 549. What is smothering in extinguishing of fire? Deselect Answer Adding the fuel element to the fire Removing the fuel element from the fire Using of water to lower the temperature Isolating the fire from the supply of oxygen None 550. Which step of the 5s-concept refers "Standardization"? Deselect Answer Step - 1 Step - 2 Step - 3 Step - 4 None 551. What is the name of road safety sign? Deselect Answer Mandatory sign Cautionary sign Informatory sign Prohibition sigN None 552. What is the back ground colour of warning signs in the basic category? Deselect Answer Blue White Yellow Green None 553. What is the full form of BIS? Deselect Answer Board of Indian Standard Bureau of Indian Standard Board of International Standard Bureau of International Standard None 554. What is the name of PPE? Deselect Answer Nose mask Head shield Face shield Hand screen None 555. What is the name of the safety sign? Deselect Answer Warning sign Mandatory sign Prohibition sigN Information sign None 556. Which is the physical hazard? Deselect Answer Smoking Vibration Corrosive Radio active None 557. Which is the correct sequence of operation to be performed when using the fire extinguisher? Deselect Answer Pull, Aim, Squeeze, Sweep Pull, Aim, Sweep, Squeeze Push, Arrange, Squeeze, Sweep Push, Arrange, Sweep, Sequence None 558. Which plier is used for making wire hooks and loops? Deselect Answer Flat nose plier Long nose plie Round nose plier Diagonal cutting plier None 559. What is the use of pincer? Deselect Answer Twisting the flexible wires Cutting small diameter of wires Extracting the pin nails from the wood D Holding small objects, where finger cannot reach None 560. Which type of fire extinguisher is used for fire on electrical equipmeNT? Deselect Answer Halon type Foam type Gas cartridge type Stored pressure type None 561. Which is the waste disposal method that produces heat? Deselect Answer Recycling Composting Incineration Waste compaction None 562. Which Personal Protective Equipment (PPE) is used for the protection from fumes? Deselect Answer Apron Goggles Ear mask Nose mask None 563. Which method is used to lift and move heavy loads? Deselect Answer Winches Crane and slings Layers and Rollers Machine moving platforms None 564. What is starving in extinguishing of fire? Deselect Answer Adding fuel to the fire Using water to cool the fire Removing fuel element from the firE Preventing oxygen supply to the fire None 565. Which disposal method of waste save lot of energy? Deselect Answer Land fill Recycling Incineration Composting None 566. Which artificial respiriation method is to be performed to the victim with injuries on the chest and belly? Deselect Answer Schafer's method Mouth to mouth method Mouth to nose method Nelson's arm-lift back pressure method None 567. Deselect Answer None 568. Which type of occupational health hazard is cause for infection? Deselect Answer Electrical hazard Biological hazard Physiological hazard Psychological hazard None 569. What is the use of this tool? Deselect Answer Holding the hot substances Cutting and twisting the wires Extracting nails from the wood Loosening and tightening the bolts and nuts None 570. Deselect Answer None 571. How will you diagonise the victim is suffering under cardiac arrest? Deselect Answer Gets pain in spinal guard Mouth will be closed tightly Heavy swelling on his stomach Appears blue colour around his lipS None 572. What will be first-aid to be given to stop the bleeding of the victim? Deselect Answer Applying ointment Keep the injured portion upward Covering the wound portion by dressing Applying pressure over the injured portion None 573. Deselect Answer None 574. Which is the golden hour for the victim injured on head with risk of dying? Deselect Answer First 15 minutes First 30 minutess First 45 minutes First 60 minutes None 575. Deselect Answer None 576. WHhich condition of the victim is referred as COMA stage Deselect Answer Unconscious but can respond to calls Conscious but cannot respond to calls Breathing but cannot respond to calls Lie totally senseless and do not respond to calls None 577. What immediate action should be taken to rescue the victim, if he is still in contact with the electrical power supply? Deselect Answer Pull or push him from the contact by hand Inform your authority about this electric shock Call someone for helping to remove him from contact Break the contact by switching OFF the power supply None 578. What is the name of the file? Deselect Answer Rasp cut file Single cut file Double cut file Curved cut file None 579. What is the name of the tool? Deselect Answer Divider Inside caliper Odd leg caliper Outside caliper None 580. What is the name of the drill bit? Deselect Answer Flat drill bit Taper shank bit Countersink bit Straight shank bit None 581. What is the name of the stake used for general purpose in sheet metal work? Deselect Answer Square stake Hatchet stake Blow horn square stake Bevel edge square stake None 582. What is the number 1.25 indicates in ISO metric fine thread M12 x 1.25.? Deselect Answer Diametric of the thread Pitch of the thread Depth of the thread Length of the thread None 583. What is the name of the tool? Deselect Answer Jenny caliper Inside caliper Outside caliper Firm joint caliper None 584. Name the part marked 'X' of the file Deselect Answer Edge Heel Tang Shoulder None 585. What is the name of the angle marked 'X' of the chisel? Deselect Answer Rake angle Point angle Clearance angle Inclination angle None 586. an accident is Deselect Answer unplanned event not controlled event undesirable event all of the above None 587. Which one of the following is not the cost due to an accident? Deselect Answer Cost due to damage to machine, tools, material and property Cost of lost time of the injured person Cost of compensation and medical aid Cost due to increase in production None 588. The safe way of working is Deselect Answer an effective and right way of working an ancient way of working a way of handling the work in a hurry a way of normal working None 589. The best way of avoiding accident is by Deselect Answer doing work in ancient way doing work in one’s own way observing safety rules related to job, machine and workplace using safety equipment None 590. In case of an accident, the victim immediately be Deselect Answer asked to take rest enquired about the accident attended to immediately left to himself without treatment None 591. An oily floor should be cleaned by Deselect Answer cotton waste putting water putting saw dust spraying carbon dioxide or sand None 592. Incase of arc welding, one should protect his eyes by using Deselect Answer dark glass screen sun goggles mask clear glasses None 593. Hack Saw blades are made up of...... Deselect Answer mild steel stainless steel high carbon steel high speed steel None 594. The distance between two adjacent teeth of hacksaw blades are Called as. Deselect Answer Specification of the blades pitch of the blades designation of the blades size of the blades None 595. What will happen to the hacright in the when the blade is kept OVernight in the hacksaw frame during cutting? Deselect Answer The blade will bend same The blade will remain * The blade will be broken The blade position is incorrect position None 596. the sze of teeth of a hackshaw blade is directly related to its pitch . how is the pitch specified’? Deselect Answer for whole length Per length of 100 m Per length of 25 mm Per length of 10 mm None 597. Which pitch of hacksaw blade is used to cut the sheet metal’ Deselect Answer 14 TPI 18 TPI 24 TPI 32 TPI None 598. A steel rule should never be used a Deselect Answer screw driver HAMMER knife all the above None 599. A wire gauge is used to measure Deselect Answer length of a wire area of a wire diameter of a wire thickness of insulation layer of a wire None 600. The tool generally used wires and cable when they are close to the the terminal is Deselect Answer electrician knife diagonal cutting plier Combination plier Scissors None 601. Name the tool which is used for making Wire hooks and loops. Deselect Answer Flat nose pliers Side Cutting pliers Round nose pliers Long nose pliers None 602. The flat nose pliers are available in the following sizes are ..... Deselect Answer 100 mm, 150 mm, 200 mm 150 mm, 250 mm, 300 mm 100 mm, 100 mm, 100 mm 150 mm, 200 mm, 200 mm None 603. What is the purpose of the flat nose pliers? Deselect Answer Holding small objects Holding flat thin plates Making wire hooks and loops Holding Cutting, twisting and pulling None 604. Which tool is used for cutting, twisting, holding and gripping of a small job? Deselect Answer Side cutting plier Fiat nose plier Combination plier Round nose Plier None 605. The size of the hammer is specified by its Deselect Answer length of the peen diameter of the face weight of the hammer height of the head None 606. What is correct way of holding hammer} Deselect Answer At the end of the handle At the middle of the handle Close to the hammer Between middle and end of handle None 607. which type of spanner is used to tight the nuts in places, wherev the place is restricted Deselect Answer Ring spanner Box spanner double ended spanner Adjustable spanner None 608. Name the tool used for loosening or tightening of nuts and bolts, which are located in narrow space or depth? Deselect Answer Double ended spanner Ring spanner Socket (box) spanner Single ended open jaw adjustable spanner None 609. Scribers are made of Deselect Answer Mild steel High carbon steel Brass Cast iron None 610. A tool which is used for boring small hole on wooden article is . Deselect Answer Bradawl Gimlet Pocker Rawl plug tool None 611. The Rawl tool is made of.... Deselect Answer Mild steel Carbon steel Stainless steel Aluminium None 612. The size of an engineer's vice is specified by the ....... Deselect Answer length of the movable jaw maximum opening of the jaws height of the vice width of the jaws None 613. The four fold wood ruler available size is Deselect Answer 600 mm 550 mm 650 mm 500 mm None 614. Which type of lifting device is used to pull heavy loads along the ground? Deselect Answer Cranes and slings Winches Machines moving platform Layers and rollers None 615. What is the nature of work for which a flat cold chisel is not suitable? Deselect Answer Remove metal from large flat surfaces For squaring the corners of jobs Chip excess metal off castings Chip excess metal of welded joints None 616. Whatt is the type of chisel you would for squaring the corners? Deselect Answer Cross cut chisel Half round nose chisel Diamond point chisel Web chisel None 617. Name the material by which the blade of screw driver is made of? Deselect Answer Tempered stainless steel Hardened and tempered mild steel Hardened and tempered soft steel Hardened and tempered carbon steel None 618. What type of screw driver is used by Electrician? Deselect Answer Heavy duty screw driver Light duty screw driver Star tip head screw driver set Flexible screw driver None 619. You have to replace a fused lamp ora defective fan. In such a case, the safest and first action which you can do is to Deselect Answer stand on a wooden stool or a work horse collect and use rubber gloves switch off the single pole switch switch off the main supply None 620. What is the first step you would like to lake to rescure a person who is in contact With live wire? Deselect Answer Call to doctor immediately Pull him away from live Wire holding his hand Isolate him from the live Wire Shift him to hospital None 621. Name the method of artificial respiratory resuscitation injury/burns in chest or belly? Deselect Answer Holgen-Nelson method Schafer's method Mouth to mouth method Resuscitation under cardiac arrest None 622. There are different methods 9 extinguishing of fire smoothening is ty method of .. Deselect Answer removing the fuel of the fire pouring of water to the fire isolating supply of oxygen to the fire lowering the temperature of the fire None 623. There are different methods extinguishing of fire. Starving is th method of ......... Deselect Answer removing the fuel of the fire pouring of water to the fire isolating supply of oxygen to thr fire lowering the temperature of the fire None 624. Which artificial resuscitation method. Suitable to the victim in the case of bum _injury in the back? Deselect Answer Mouth to mouth method Schafer’s method Nelson’s method Holgen-Nelson method None 625. Which type of fire extinguisher is tot used on electrical equipment installation under fire? Deselect Answer Foam type Halon type Gas Cartridge water filled type Stored pressure water filled type None 626. Which one of the following fire extinguisher is suitable for a live electrical fire? Deselect Answer Halon Water Foam Liquefied chemical None 627. Which artificial respiration method is suitable in the case of injuries.to the victim, when his mouth will not open? Deselect Answer Nelson's artificial respiration method Schafer's artificial respiration method Mouth to Mouth -artificial respiration method Mouth to nose artificial respiration method None 628. Which artificial resuscitation method is suitable to the victim, in the case of injury/ burns to chest or belly? Deselect Answer Nelson's method Mouth to mouth method Schafer’s method Halogen-Nelson method None 629. In which type fire, both foam and dry powder fire extinguishers can be used? Deselect Answer Class “A” fire Class “B” fire Class “C” fire Class “D” fire None 630. The victim has injury on his chest. Which E method of artificial resuscitation NOT to be followed? Deselect Answer Schafer's method Nelson’s method Mouth to Mouth method Mouth to nose method None 631. Which type of fire extinguisher must NOT be used for electrical base fire? Deselect Answer Halon extinguisher Carbon tetra chloride (CTC) extinguisher Foam extinguisher Dry power extinguisher None 632. Deselect Answer None 633. Which is the example of mandatory sign form the following safety signs examples? Deselect Answer Risk of electric shock Wear head protection Corrosive substances Smoking prohibited None 634. Which one is NOT a prohibition term used in the following? Deselect Answer Smoking and naked flames Do not extinguish with water Pedestrian crossing Wear eye protection None 635. Which one is NOT a mandatory term used in the following? Deselect Answer Wear foot protection Pedestrian crossing Wear respirator Wash hand None 636. Which one of the following sig” will indicate “Danger 415 V"? Deselect Answer Prohibition sign mandatory sign Warning sign Information sign None 637. Which type of shape is used for displaying the “no smoking” prohibition sign? Deselect Answer Rectangle Circular Square Triangle None 638. The colour used for displaying the prohibition sign is .... Deselect Answer red border and cross bar, black symbol and white background red border and cross bar black symbol and white background black symbol None 639. Which is the most suitable fire extinguisher for the class “D” fire shown in figure? Deselect Answer Carbon tetra Chloride extinguisher (CTC foam extinguisher water filled extinguisher gas cartridge halon extinguisher None 640. A hammer with loosely fitted handle will Deselect Answer fly away and cause accident absorb shock have easy swing convey more leverage None 641. While grinding one must use Deselect Answer dark glass screen mask safety goggles sun goggles None 642. A try-square is specified Deselect Answer as per length and breadth of its blade as per length of its blade from terminal to the inner end of the stock as per length of its blade from terminal to the outer end of the stock as per length and breadth of its stock None 643. Hammers are classified Deselect Answer as per their hole and weight as per their frame's shape and weight as per their heel’s shape and weight as per their handle’s length None 644. The Cutting edge of a flat cold chisel is slightly convexed so that Deselect Answer less power is required in Cutting a metal and its edge doesn't fasten in the job metal can be cut easily chipping can be done in a straight line (d) its edge will not break during chipping None 645. Chiesels are made of Deselect Answer high carbon Steel cast stee| tungsten steel None 646. The main reason of teeth s. hack-saw blade is Deselect Answer to reduce frictio; metal Nothing to give a beautiful shape to it tohelp in Cutting width and depth etting of a n during Cutting the jobs having more width and depth None 647. A file is made of Deselect Answer cast iron cast steel or spécial tool steel mild steel nickle steel None 648. The length of a file is measured : Deselect Answer along the tip to the shoulder along the tip to the heel along the tip to the tang along the heel to the tang None 649. The length of a hack-saw blade is’ measured Deselect Answer between the inner ends of the two! pin-holes between the outer ends of the ‘wom pin-holes between centres of the pin-holes between the inner end of pin hole and the outer end of the other pin hole None 650. Deselect Answer None 651. The taper shank drills should be removed from the machine spindle by means of Deselect Answer hammer tang of file punch drift None 652. Drill chucks are held on the machine spindle by means of Deselect Answer arbor drift draw-in bar chuck nut None 653. The lip clearance angle of twist drill for general purpose should be Deselect Answer 3to 8 4 to 8° 8 to 12° 12 to 15° None 654. The suitable cutting fluid for drilling M.S, plate is Deselect Answer soluble oil water compressed air dry None 655. Taps are re-sharpened by grinding Deselect Answer flutes threads diameter relief None 656. The tapping hole should be Deselect Answer larger than the tap size smaller than the tap size equal to the tap size equal to the core (minor) diameter of the tap None 657. The shape of the frame of thread snap "gauge is in the form of Deselect Answer Round Square 'Y' type "0" type None 658. The shape of the thread in the ‘Not Go ond of a thread snap gauge is Deselect Answer Beveled Truncated Sharp None 659. Deselect Answer None 660. A rivet is specitiod by the dlametre of its Deselect Answer head Tall Shank None of the above None 661. which one of the following rivets for girders and heavy conatru work ? Deselect Answer Pan head rivet Snap head rivet Flat head rivet Countersunk head rivet None 662. Which one of the following riveta for general structural work Deselect Answer Pan head rivet Snap head rivet Flat head rivet Countersunk head rivet None 663. For riveting aluminium sheets, material of rivet should be Deselect Answer Aluminium Copper Brass None 664. The height of the snap head rivet is standardized to Deselect Answer 0.5 x diameter of rivet 0.7 x diameter of rivet 0.9 x diameter of rivet 1.1 x diameter of rivet None 665. In a riveted joint the edges of plates are simply laid over each other and riveted. This joint is called Deselect Answer Lap joint Butt joint Edge joint Corner joint None 666. In a riveted joint the plates are placed end-to-end and jointed through cover plates. This joint is called Deselect Answer Lap joint Butt joint Edge joint Corner joint None 667. In a riveted joint pitch is the distance between two adjacent rivets in the same row, measured parallel to the seam. It is usually equal to Deselect Answer Diameter of the rivet hole 2 x Diameter of the rivet hole 3x Diameter of the rivet hole 4 Diameter of the rivet hole None 668. In a riveted joint the minimum distance from a rivet hole centre to the nearest edge of the plate is called Deselect Answer Back pitch Allowance Tolerance Margin None 669. Which one of the following reasons is responsible for crushing of metal in the riveted joint ? Deselect Answer Thickness of plates is more Thickness of plates is less Diameter of rivet is too large Diameter of rivet is too small None 670. Which one of the following reasons is responsible for shearing of rivet in a riveted joint ? Deselect Answer Diameter of rivet is too small Diameter of rivet is too large Thickness of plates vary Pitch of the hole is too small None 671. which of the following reasons 1s he following Pr eyin the Which one of t the met responsible for splitting © riveted joint? Deselect Answer Pitch of the rive Holes of the rivets are drilled too near from the edge of the plate pitch of the rivets are too small Holes for rivets are drilled too far ; the edge of the plate None 672. Taper shank drills are held on machine by means of: Deselect Answer Chucks Drift Sleeve Vice None 673. Which tool will you use for removing taper shank drill from the socket? Deselect Answer The slot The sleeve The tank The drift None 674. A coolant is used for Cooling the: Deselect Answer Machine Job only Cutting tool Hot chips None 675. Which tap of a set is Sufficient to finish the thread of a through hole? Deselect Answer Taper tap Intermediate tap Plug tap Bottoming tap None 676. How Many threads are in first tap for Cutting internal threads? Deselect Answer 2 to 3 4 to6 8 to 10 11 to 12 None 677. The Cutting compound is used for Deselect Answer easy movement of a sliding part of a machine Cooling the machine cooling the Cutting tool only “cooling the job and the cutting tool None 678. Countersinking is done on drilled holes to accommodate Countersunk head of Wood screw. What is the general bit size available? Deselect Answer 6 to 15mm 8 to 20 mm 10 to15 mm 10 to 25 mm None 679. If a drill bit does not cy the reason is this that Deselect Answer less or No lip clearance angle more Clearance angle no body clearance angle high Cutting angle None 680. The hand drill is used for drilling the holes} upto ...... Deselect Answer 5 mm diameter 6 mm diameter 6.5 mm diameter 7.5 mm diameter None 681. what will happen if the grinding is rotating in Opposite direction while grinding? Deselect Answer Grinding operation is not possible Grinding wheels will be damaged grinding wheels will become loose’ sparkling while grinding will be more None 682. which tool is used to cut extreme threads on conduit pipe? Deselect Answer ‘T’ handle tap wrench Solid tap wrench Die stock Die stock None 683. the fundamental unit of measurement of the resistance is Deselect Answer megaohm millohm ohm kiloohm None 684. Burning wood is classed as which type of fire? Deselect Answer Class A Class B Class C Class D None 685. On finding a fire in a building a carpenter's first action should be Deselect Answer Raise an alarm Fight the fire Leave the building Carry on working None 686. A person being electrocuted should be removed from the live supply by means of Deselect Answer A length of metal pipe A length of dry timer A length of wet timber A scaffold pole None 687. If your clothes catch fire on the work spot, what will you do first? Deselect Answer Run away from the spot Roll over the ground Puta thick blanket all over the body Direct a fire extinguisher towards the clothes None 688. If a person faints due to suffocation, th first aid to be given is Deselect Answer Give him a warm drink Sprinkle cold water on his face Place him on a well ventilated location Give him artificial respiration None 689. An oily floor should be cleaned by Deselect Answer Cotton waste Putting water Putting saw dust Putting sand None 690. Long hair must be tied back because Deselect Answer It can get dirty with the oil and dust from the workshop It gets in the way when you are working It looks better tied up It can get caught in the machines and cause serious injury None 691. The best method to avoid an accident is Deselect Answer By wearing safety equipment By observing safety precautions related to the job, machine and working place Doing things in one's own way Doing things which a highly skilled worker practices None 692. Which one of the following fire extinguishers is suitable for the live electrical fire? Deselect Answer Halon Water Foam Liquified chemical None 693. Fire is made to starve by removing Deselect Answer Oxygen Heat Fire Fuel None 694. In ABC of first aid, A stands for Airway, B stands for breathing and C stands for Deselect Answer Cardio problem Circulation Cardio arrest Cleaning and dressing None 695. Deselect Answer None 696. The three factors that cause fire are oxygen, fuel and Deselect Answer Heat CO H20 Hazardous None 697. What is the benefit of 5S system? Deselect Answer Increase in manpower Increase in economy Increase in productivity Reduction in pollution None 698. he cutting edge of a flat cold chisel is Deselect Answer less power is required in cutting a metal and its edge doesn't fasten the job metal can be cut easily clipping can be done in straight line its edge will not break during chipping None 699. The size of the hammer is specified by its ...... Deselect Answer length of the peen diameter of the face weight of the hammer height of the head None 700. What is the purpose of the flat nose pliers? Deselect Answer Holding small objects Holding flat thin plates Making wire hooks and loops Holding cutting, twisting and pulling None 701. The tool generally used for cutting small wires and cables when they are close to the terminal is Deselect Answer electrician knife diagonal cutting plier combination plier scissors None 702. A wire gauge is used to measure . Deselect Answer length of a wire area of a wire diameter of a wire thickness of insulation layer of a wire None 703. Deselect Answer None 704. The size of the hammer is specified by its Deselect Answer Length of the peem Diameter of the face Weight of the hammer Height of the head None 705. Which type if file would you select for filing a wooden plank Deselect Answer Rough file Rasp cut file Bastard file Single cut file None 706. Which tool is used for cutting square holes in mica sheet used on wooden boards in electrical wiring Deselect Answer Tenon saw Key hole saw Hack saw Carpenter saw None 707. Which type of chisal is used for making rectangular hole in wood Deselect Answer Mortise chisal Paring chisel Firmer chisal Bevel firmer chisel None 708. The cutting blades of jack plane is made up of Deselect Answer High speed steel High carbon steeel Tungsten steel Alloy steel None 709. Which type of bench plane is suitable to plane a small wooden piece Deselect Answer Jack plane Smoothing plane Coarse plane Rebate plane None 710. What is the type of chisel you would select for squaring the corners Deselect Answer Cross cut chisel Half round nose chisel Diamond point chisel Web chisel None 711. There are several applications of a try sauare what cannot be done by using a try square Deselect Answer Check parallal of workpiece surface Check squarences of field surface Check flatness of surface Mark lines at 90° to the edge of a workpiece None 712. bent snip is used for Deselect Answer removing the blurr making holes on the sheet bending the sheet cutting the sheet along curve lines None 713. mallet is made of Deselect Answer lead brass hard wood cast iron None 714. copper and brass sheets are Deselect Answer hard and brittle malleable and ductile malleable and brittle hard and ductile None 715. Which among the following joints is suitable for roofing work?Which among the following joints is suitable for roofing work?Which among the following joints is suitable for roofing work? Deselect Answer Number size Gauge Standard size None of the above None 716. Sheet metal work is carried out only on metal sheets, which are Deselect Answer Forged Cast Rolled None of the above None 717. Which one of the following is the common reason for using aluminium sheets ? Deselect Answer Lightness Brightness Dullness Darkness None 718. Which one of the following notches is used when making a job with a 90° bend? Deselect Answer Square notch V-notch Wired notch Slant notch None 719. Which one of the following stakes is used when shaping and seaming funnels and tapered articles? Deselect Answer Hatchet stake Half-moon stake Funnel stake Creasing stake None 720. Which among the following stakes provides a double-ended support? Deselect Answer Hatchet stake Half-moon stake Creasing stake Horse stake None 721. The least bend radius varies depending on the Deselect Answer Material and thickness of plate Direction of plate Working temperature all of the above None 722. Which type of metal sheet is used for furnace? Deselect Answer Sheet steel Galvanized iron steel Copper sheet Aluminium sheet None 723. . Which type of sheet is used for making house hold utensils? Deselect Answer Sheet steeL Aluminium Copper sheets Galvanised iron sheet None 724. What type of sheet metal is suitable for making food containers? Deselect Answer Aluminium sheet Sheet steel Tin sheet Galvanized iron sheet None 725. Which type of stake is used for folding sheet metal bending edges? Deselect Answer Hatchet stake Square stake Blow Horn square stakes Bevel-edge square stake None 726. Which pitch of hacksaw blade is suitable to cut the sheet metal? Deselect Answer 14 TPI 18 TPI 32 TPI 24 TPI None 727. The thickness of the metal used in sheet metal works above 5 mm is called as Deselect Answer Sheets Plates Strips Foils None 728. For making various types of hems and seams from the sheet metal of thickness less than 0.4 mm, the allowance should be Deselect Answer Twice the thickness of sheet. Three times the thickness of sheet. Four times the thickness of sheet. No allowance. None 729. How many numbers of electrons in a copper atom? Deselect Answer 29 39 49 59 None 730. ow many number of electrons will move in one second for one ampere current through a cross section of the conductor? Deselect Answer ) 6.24 x 10^12 ) 6.24 x 10^16 6.24 x 10^14 6.24 x 10^18 None 731. One joule per second is Deselect Answer one volt one ampere one watt one ohm None 732. Practical S.I. unit of heat is expressed in 8. What is the S.I. unit of specific resistance? Deselect Answer ohm/cm ohm metre micro ohm/cm ohm/metre None 733. Which electrical device is the example for medium resistance? Deselect Answer Shunt resistance Heater resistance Contact resistance Armature winding resistance None 734. What is the commercial unit of electrical energy? Deselect Answer mega watt hour kilo watt hour watt hour watt seconds None 735. The increase in resistance per ohm per degree centrigrade rise in temperature is Deselect Answer calorie centrigrade celsius joule None 736. What is the unit of power? Deselect Answer kilo volt watt hour kilo watt kilo watt hour None 737. What is the value of resistivity of copper conductor? Deselect Answer 1.72 micro ohm metre 1.73 ohm/cm³ 1.72 micro ohm/m³ 1.72 micro ohm/cm³ None 738. What is the unit of specific resistance? Deselect Answer ohm/cm² ohm/metre micro ohm/cm³ milli ohm/m² None 739. Which material is having negative temperature coefficient? ( Deselect Answer Tungsten Eureka Carbon Nichrome None 740. Which is the example for negative temperature coefficient substance? Deselect Answer Copper Nichrome Aluminium Mica None 741. The change in resistance per ohm per degree centrigrade is called as... Deselect Answer specific resistance mechanical equivalent of heat temperature coefficient of resistance None 742. . As per Ohm's law statement in the circuit, current is directly proportional to........ Deselect Answer voltage resistance temperature specific resistance None 743. Which law states that the relation between the current, voltage, and resistance in a closed circuit is at a constant temperature? Deselect Answer Kirchhoff's current law Ohm's law Kirchhoff's voltage law Laws of resistance None 744. Which law states that, in each closed circuit, the sum of all voltage drops are equal to zero? Deselect Answer Ohm's law Kirchhoff's first law Kirchhoff's second law Coulomb's law None 745. In any electric network, the sum of the incoming currents at each junction is equal to the sum of the outgoing currents. What is the name of the law? Deselect Answer Ohm's law ) Laws of resistance Kirchhoff's second law Kirchhoff's first law None 746. Which law states that the sum of the currents meeting at junction is equal to zero? Deselect Answer Ohm's law ( Kirchhoff's 1st law Kirchhoff's 2nd law Coulomb's law None 747. When the current is passed through the conductor, it gets heated. That effect is called as..... Deselect Answer magnetic effect thermal effec chemical effect electrostatic effect None 748. As per IE rule, caution notice shall be displayed on electrical equipments/lines depending on the level of voltage. What type of caution notice shall be displayed on equipment / line operating between 650 V to 33 kV? Deselect Answer "CAUTION" - Medium voltage "CAUTION" High voltage "CAUTION" - Extra voltage "CAUTION" - Very high voltage None 749. The conversion of energy, which takes place in a thermal power station is from Deselect Answer heat energy to electrical energy. light energy into electrical energy. hydro energy into electrical energy solar energy into electrical energy None 750. What is the formula to be used to find the power, if the current and voltage values are known? Deselect Answer Vx I V square v square x 1 V x I square None 751. The work or energy in an electrical circuit is calculated by Deselect Answer WV. C joules W=1.R. C joules WV.I. E joules W=12. R. T joules None 752. An appliance has a resistance of 100 ohms, takes 2 amperes. What is the power consumed by the appliance? Deselect Answer 400 watts 300 watts 450 watts 350 watts None 753. A 1000 watts heater is connected to a 240 V, AC supply. Then the current drawn by the heater is........ Deselect Answer 4.006 amperes 4.106 amperes 4.160 amperes 4.166 amperes None 754. The given Wheatstone bridge is balanced when P= 100 2; Q=1k2 and S = 120 £2. Calculate the value of the unknown resistance. Deselect Answer 1.1 ΚΩ 1.2 ΚΩ 1.3 ΚΩ 1.5 ΚΩ None 755. What is the power input to an electric heater, that draws 4 amperes at 250 volts supply source? Deselect Answer 360 watts 720 watts 960 watts None 756. A 10 volts battery is connected to a 5 ohms resistor, then the current flows through resistor is. Deselect Answer 50 amperes 25 amperes 4 amperes 2 amperes None 757. Calculate the hot resistance value of the lamp 200 watts/250 volts? Deselect Answer 6250 ohms 625 ohms 3125 ohms 312.5 ohms None 758. Two lamps rated 200 W/240 V are connected in series and combined set is connected across 240 V. AC supply mains. The total power consumed in the circuited is Deselect Answer 400 W 300 W 100 W 200 W None 759. FROM THE FOLLOWING FIGURE CALCULATE THE RESISTANCE MEASURED between x and y Deselect Answer 2 ohm 3 ohm 8 ohm 38 ohm None 760. What is the value of medium resistance based on its ohmic value? Deselect Answer One ohm to 1000 ohm Above one ohm upto 10 kilo ohms Above one ohm upto 100 kilo ohms Above 100 kilo ohms None 761. Two incandescent lamps of 125 V, 40 W and 125 V, 100 W are connected in series to a supply voltage of 230 volts. What happens due to this connection? Deselect Answer The drop across the 100 W lamp will be higher than its rated voltage. therefore it will fuse. The lamps will be fused immediately because they are rated for 125 V. The drop across the 40 W lamp will be higher than its rated voltage, therefore it will fuse. The 100 W lamp draws higher current, therefore the 40 W lamp will be fused None 762. In which materials, if the temperature is increased, then the resistance will decrease? Deselect Answer Tungsten Carbon Nichrome Manganese None 763. A 12 ohm resistor connected across a 60 V, DC source. Calculate the current flows. through the resistor Deselect Answer 4 amperes 5 amperes 10 amperes 12 amperes None 764. What is the commercial unit of electrical energy? Deselect Answer watt hour kilo volt ampere kilo watt hour volt ampere None 765. The resistance offered between the two opposite faces of a metre cube or centimetre cube of the material is called R₂ 60 k R₁ 60 k Deselect Answer internal resistance specific resistance laws of resistance equivalent resistance None 766. The specific resistance of a substance depends on Deselect Answer its length its cross sectional area its kind of material all the above stated factors None 767. The amount of current flowing through a resistance depends on Deselect Answer applied voltage only ohmic value of the resistor only applied voltage and ohmic value of the resistor none of the above None 768. For a constant applied voltage the current (/) flowing through a resistor is Deselect Answer directly proportional to R inversely proportional to R equal to R constant irrespective of change in R None 769. Deselect Answer None 770. According to Ohm's Law, the relation between resistance (R), current (1) and p.d. (V) is stated as Deselect Answer I = VIR R=VI V=IIR R= IIV None 771. What will be the voltage drop across a resistor of 60 ohms if the current flowing through it is 0.1 ampere Deselect Answer ) 60 V 1 V 6 V 600 V None 772. Deselect Answer None 773. What will be the total resistance of the three resistances R,, R, and R, which are connected as shown in the given figure Deselect Answer 20 KILO OHM 30 KILO OHM 60 KILO OHM 180 KILO OHM None 774. If three resistances of 100 2, 2002 and 300 2 are connected in parallel and the applied voltage is V then Deselect Answer the current flowing through the resistors is the same, whereas, voltages developed across them will be different the current flowing through the resistors and the voltages developed across them will be the same the voltages across the resistors will be the same, whereas, currents flowing through them will be different the current flowing through the resistors and the voltages developed across them will be different None 775. What will be the amount of curret (/) flowing through the given circuit - Deselect Answer 6 A 1 A 3 A 0 A None 776. If in the given circuit the value of R, is doubled then for a given voltage Vs Deselect Answer I, would be halved and, would be halved , would be unaffected. All currents would be affected. None 777. The cross-sectional area of a conductor . is 20 sq.m and its resistance is 4 ohms. If its cross-sectional area is doubled then its new resistance will be: Deselect Answer 8ohms 4 ohms 5 ohms 2 ohms None 778. It was experimentally found by James Precott Joule that the heat produced in a current carrying conductor is directly proportional to Deselect Answer the square of current the square of resistance the current the square of the applied voltage None 779. If a 200 watts lamp is connected across a 250 volt source then what will be the circuit current ? Deselect Answer 4 A 0.8 A 2 A 1 A None 780. The monthly power consumption of 10 lamps of 100 watts each used 8 hours a day will be: Deselect Answer 240 units 245 units 225 units 250 units None 781. The power consumption of 100 watts lamp used for 10 hours daily will be Deselect Answer 2 units 1 units 0.5 unit C5 UNIT None 782. In a closed loop of a d.c. circuit, the algebraic sum of the e.m.fs (E) is equal break to Deselect Answer zero algebraic sum of the products of resistances and current flowing through them sum of the voltage drops across the resistors none of the above None 783. hat is the value of current /, in the circuit shown below? Deselect Answer 1 A 7 A 4 A 3 A None 784. How many electrons are in the outer most orbit of a semi conductor substance? Deselect Answer 5 only 4 only 3 only 1 only None 785. How many free electrons are in the outer most orbit of semi conductor atom? Deselect Answer 1 2 3 4 None 786. the number of balance electrons of the germanium element is Deselect Answer 5 4 3 2 None 787. The number of electrons in a silicon atom is Deselect Answer 7 14 29 32 None 788. How many electrons are there in the outermost orbit of silicon atom? Deselect Answer 3 4 5 14 None 789. How many electrons are in aluminium atom? Deselect Answer 13 18 29 43 None 790. How many protons are in the nucleus of copper atom? Deselect Answer 13 29 36 48 None 791. Deselect Answer None 792. Number of protons in silver atom Deselect Answer 8 12 47 None 793. How many protons in germanium atom? Deselect Answer 14 29 32 34 None 794. How many free electrons will move through across of a conductor for one ampere current in one second ? Deselect Answer 2.64 x 10^16 4.64x 10^18 6.24 x 10^18 6.24 x 10^20 None 795. Which law states the relation between the current, voltage and resistance in a closed circuit at constant temperature? Deselect Answer Kirchoff's first law Kirchoff's second law Joule's law Ohm's law None 796. As per Ohm's law statement, the circuit current is inversely proportional tO Deselect Answer voltage resistance specific resistance quantity of electricity None 797. The unit of resistance is Deselect Answer mho volt ohm apmpere None 798. Four equal resistors are connected in series and their total resistance is 800 ohms. What would be the total resistance when they are connected in parallel? Deselect Answer 10 ohm 50 ohm 400 ohm 1600 ohm None 799. In a circuit 20 mA current is flowing across a resistance, at 12 V supply source. What will be the current, when the voltage is increased to 24 V? Deselect Answer 20 mA 30 mA 40 mA 60 mA None 800. The potential difference is measured by Deselect Answer ammeter ohmmeter voltmeter wattmeter None 801. The S.I. unit of electric charge is Deselect Answer volt/ohm ampere/second watt second coulomb None 802. What is the unit of commercial Electric power? Deselect Answer ampere hour kilowatt hour kilowatt ampere second None 803. The unit of the quantity of electricity is Deselect Answer amphere / second columb mho watt second None 804. kilowatt hour (kWh) is the unit of Deselect Answer electrical power electrical energy quantity of electricity Electric current None 805. Which material is having the property of negative temperature co-efficient? Deselect Answer Manganin Aluminium Eureka Carbon None 806. Which one of the following has negative temperature coefficient? Deselect Answer Brass Mercury Electrolytes Silver None 807. The formula to find the temperature co efficient of resistance (R) of a material is Deselect Answer None 808. The heat generated is calculated using Joules law is Deselect Answer H= 0.24 IRt calories H= 0.24 12Rt calories H= 0.24 12R calories H= 0.24 12f calories None 809. . Which law states that "At each junction of current, the sum of the incoming currents is equal to the sum of the outgoing currents"? Deselect Answer Ohm's law Kirchhoff's current law Kirchhoff's voltage law Lenz's law None 810. In any electric network, the sum of the incoming current at each junction is equal to the sum of outgoing current. What is the name of the law? Deselect Answer Ohm's law Kirchhoff's second law Laws of resistance Kirchhoff's first law None 811. Under balanced condition, the current flowing through the detector is equal to Deselect Answer One ampere Zero ampere Sum of the currents flowing in the adjacent arms Difference between the currents flowing in the adjacent None 812. The accuracy in a bridge measurement depends on ... ( Deselect Answer Sensitivity of detector Applied voltage Accuracy of indicator Sensitivity of detector or Applied Voltage None 813. A null type of bridge with D.C. excitation is commonly known as Deselect Answer Anderson bridge Wheatstone bridge Wein bridge Schering bridge None 814. The condition for the validity under ohm's law is that the.. Deselect Answer Temperature should remain constant Current should be proportional to Voltage Resistance should be wire wound type All of these None 815. The ratio of voltage and electric current in closed circuit.. Deselect Answer Remains constant Varies Increases Falls None 816. If in a closed circuit, the voltage is reduced to half and resistance is doubled, the current becomes.. Deselect Answer Four times double half quarter None 817. The curve representing ohm's law is.. Deselect Answer Sine function Linear parabola hyperbola None 818. A linear resistor are one's which obey. Deselect Answer Ampere's law Lenz's law Ohm's law Kirchhoff's law None 819. . Which is the lightest particle in an atom ? Deselect Answer Proton Neutron Electron All are of equal weight None 820. Flow of how many electrons per second will produce current of one ampere? Deselect Answer 6.25 x 10^18 6.25 x 10^19 1.602 x 10^19 6.25 x 10^8 None 821. In gases, the flow of current is due to ... Deselect Answer Electrons only Positive and negative ions Electrons and positive ion Electrons, positive ions and negative ions None 822. Silicon has.... valence electrons Deselect Answer 4 3 5 6 None 823. When a normal atom loses an electron, the atom.. Deselect Answer Becomes a positive ion Becomes a negative ion Becomes electrically neutral then forced to move about None 824. The flow of electric current in a conductor is due to flow of.. Deselect Answer Electrons Protons Electrons and ions Charged particles None 825. An electric current is the..... Deselect Answer Random movement of electrons in a conductor Movement of free electrons predominantly in one direction Pressure difference between two poles he power that causes drift of electrons None 826. Current is measured in.. Deselect Answer watt volt henry ampere None 827. Which of the following is not an electrical quantity? Deselect Answer Voltage Current Distance Power None 828. Which of the following is an active element in a circuit? Deselect Answer Current source Resistance Inductance Capacitance None 829. For a voltage source... Deselect Answer Terminal voltage is equal to source e.m.f Terminal voltage cannot exceed source e.m.f Terminal voltage is always lower than source e.m.f Terminal voltage is higher than the source e.m..f None 830. The internal resistance of practical voltage source is considered to be connected in.. Deselect Answer Series Parallel Either in series or paralle None of these None 831. Resistance is measured in.... Deselect Answer henry ohm hertz watt None 832. Internal resistance of ideal voltage source is Deselect Answer Zero Infinite Can be determined Finite value None 833. A series circuit consists of three resistors with values of 120 12, 270 2 and 330 2. The total resistance is... Deselect Answer Less than 120 ohms 270 ohms 720 ohms 120 ohms None 834. If three resistances each of R ohms are connected in parallel, then value of effective resistance in ohms will be... Deselect Answer 3R R R/3 R^3 None 835. Acircuit contains two unequal resistances in parallel, but. Deselect Answer Voltage drop across the both are same urrent in both are the same Heat loss in both are the same Voltage drops are according to their resistive value None 836. Which quantity consists of a unit 1 kWh? Deselect Answer Energy Power Time Charge None 837. The unit of electrical energy is... Deselect Answer kW kVA KVAR kWh None 838. Intrinsic semiconductor material is characterised by a valence shell of...... Deselect Answer 1 2 4 6 None 839. One eV is equal to ... Deselect Answer 6.02 x10^23 joules 1.6x 10^-19 joules 6.25 x10^18 joules 1.66 x 10^-24 joules None 840. Resistance of human body is about. Deselect Answer 10 OHMS 1 KOHMS 100 OHMS 10 KOHMS None 841. An electric current is the.. Deselect Answer Random movement of electrons in a conductor Movement of free electrons in one direction Pressure difference between two poles The power that causes drift in the electrons None 842. The effect of connecting an additional parallel load to an electrical supply source is to increase the. Deselect Answer .. Resistance of the load Voltage of the source Potential difference across the load Current taken from the source None 843. The resistance of the material depends Deselect Answer Length Area of cross section Material All of these None 844. Which of the following lamps has least resistance? Deselect Answer 200 W. 220 V 100 W, 220 V 60 W, 220 V 15 W, 220 V None 845. Which resistor is physically largest in size? Deselect Answer 100 ohms , 50 W 10 ohms , 50 W 1 M ohm , 1/2 W 1 Kohm , 1W None 846. For the same voltage, the ratio of resistance of 25 W and 100 W lamp will be Deselect Answer 1:2 2:1 4:1 1:4 None 847. Which of the following materials has least resistivity? Deselect Answer Lead Copper Zinc Mercury None 848. Which of the following materials possesses the least specific resistance? Deselect Answer Aluminium Copper Silver Iron None 849. The resistance of wire varies inversely as on... Deselect Answer Length Area of cross section Material All of these None 850. What is the voltage source for a circuit carrying 2 amperes of current through a 362 resistor Deselect Answer 1.8 V 18 V 72V 7.2V None 851. The temperature coefficient of resistance of an insulator is.. Deselect Answer Positive and independent of temperaturE Negative and independent of temperature Negative and dependent of temperature Positive and dependent of temperaturE None 852. FUSUING factor is Deselect Answer None 853. A fuse wire should have: Deselect Answer low specific resistance and high melting point low specific resistance and low melting point high specific resistance and high melting point high specific resistance and low melting point None 854. Over-load current protection for a motor is provided by Deselect Answer cartridge fuse kit-kat fuse over-load current relay all the above None 855. In a motor circuit, a fuse provides: Deselect Answer over-load current protection short-circuit protection open-circuit protection ( none of the above None 856. A fuse operates due to the.... effect of the electric current: Deselect Answer magnetic electrostatic heating chemical None 857. The fuse rating is expressed in terms of Deselect Answer voltage current KVA VAr None 858. A Delayed-action cartridge fuse is used for Deselect Answer motor circuits lighting circuits fluorescent lamp circuits heating circuits None 859. A fuse should be connected in: Deselect Answer series of neutral conductor parallel of neutral conductor ) series of live conductor parallel of live conductor None 860. For safety point of view, the fuses should be placed in. Deselect Answer neutral cable phase cable earth wire any wire/cable None 861. A fuse in a circuit provides protection against..... Deselect Answer open circuit ) over load short circuit and overload open circuit and overload. None 862. Fusing factor is Minimum fusing current Deselect Answer Rated current Maximum fusing current Rated current Rated current Minimum fusing current ) Rated current Maximum fusing current None 863. Which one of the following is the primary function of the fuse? Deselect Answer To protect the operator ( To protect the line To prevent excessive current ( To open the circuit None 864. A fuse in an electrical circuit "blows" as a result of a high......... Deselect Answer voltage caused by a short circuit ) current flow caused by a short circuit voltage caused by an open circuit current flow caused by an open circuit None 865. 35 S.W.G. copper wire has a fusing rate Deselect Answer 6 amperes 5.5 amperes 5 amperes 4 amperes None 866. as compared to rewirable fuses, H.R.C. fuses have....... Deselect Answer high rupturing capacity high speed of operation no ageing effect low rupturing effect None 867. The quick response type catridge fuse is used for....... Deselect Answer lighting circuits heating circuits motor circuits wiring circuits None 868. The protective device which will not open the circuit even after 4 hours, when the current is 1.5 times the excess of the rated current will be Deselect Answer H.R.C. fuses Cartridge fuses Circuit breakers rewirable fuses None 869. Which type device, switches are classified? Deselect Answer Controlling device Holding device Safety device Outlet device None 870. Different type of switches are being used in lighting circuits. Which switch is used for stair case wiring? Deselect Answer One way switch Two way switch Bed switch Push switch None 871. How many two way switches are required for the stair case wiring? Deselect Answer 2 3 4 5 None 872. The specification surface type tumbler switch, one way is..... Deselect Answer 6 A, 250 V 6 A, 240 V 6 A, 230 V 5 A, 250 V None 873. In which type of accessories, intermediate switch belongs? Deselect Answer Holding accessories Safety accessories Controlling accessories Outlet accessories None 874. Though the I.C.D.P. switch of an electrical installation is in OFF position, load connected to the switch is functioning normally. This is due to..... Deselect Answer Earth fault between L & E in the switch Loose handle fixed on baffle carrier rod of switch Short between L & N in the switch Baffles in the switch are in open condition due to damaged operating rod. None 875. The main switch used in single phase supply is to be provided with....... Deselect Answer fuse in both line and neutra a fuse in the line and a link in the neutral a link in the line and a fuse in the neutral thicker fuse wire in the phase and thinner fuse wire in the neutral. None 876. How many number of SPT and two way switches are required for the installation of godown wiring with 6 No. of lamps? Deselect Answer One SPT and 6 Two way Two SPT and 5 Two way One SPT and 5 Two way Two SPT and 6 Two way None 877. Switch and accessory boxes need not be earthed if they are made up of Deselect Answer metal box sheet metal box cost iron box PVC box None 878. The electrical accessories used in wiring installation are classified according to their uses. In what classification of accessories, the ceiling rose will belong? Deselect Answer Holding Accessories General Accessories Safety Accessories Controlling Accessories None 879. In what classification of accessories, the distribution board will belong? Deselect Answer Safety Controlling General Holding None 880. As per BIS 1293-1988, the voltage rating 32. Which type of outlet accessory is suitable for double insulated appliances having P.V.C. or insulated body? Deselect Answer Three pin socket Two pin socket Three pin plug Two pin plug None 881. Two pin sockets should not be used in domestic wiring unless the appliance to be connected is Deselect Answer double earthed double insulated controlled by E.L.C.B. controlled by M.C.B. None 882. A length of conductor which is having one or more cores insulated from each other is called as . Deselect Answer core strand wire cable None 883. Which tool is used to measure the size of the conductor? Deselect Answer Bevel gauge Vernier caliper Standard wire gauge Depth gauge None 884. What is the advantage of stranded conductors over solid conductors? Deselect Answer More flexible More area of cross section More resistance ) More weight None 885. The outer screwed contacts of Edison screw type lamp holder must always be connected to the: Deselect Answer neutral wire of the circuit phase wire of the circuit Switch (half wire) of the circuit ) earth wire of the circuit None 886. The safe maximum current that can pass continuously without overheated is called Deselect Answer fusing current current rating over load current safe current None 887. The socket is rated as...... and having only two terminals holes without earth connection. Deselect Answer 6A, 220V 6A, 230V 6A, 240V 6A, 250V None 888. Which type of lamp holders can be used for more than 300 watt lamps only? Deselect Answer Edison screw type lamp holders ( Goliath Edison screw type holder Swivel lamp holder Bayonet cap lamp holder None 889. What type of accessory is shown in the figure? Deselect Answer Holding Accessories Controlling Accessories Safety Accessories Outlet Accessories None 890. What is the type of metal conduit outlet box shown in the figure? Deselect Answer T' type outlet box Angle type outlet box Through type outlet box Back type outlet box None 891. Name the type of conduit accessory shown in the figure. ( Deselect Answer Solid conduit bend Inspection conduit bend Solid conduit elbow Inspection conduit elbow None 892. Name shown in the figure? Deselect Answer T Type outlet box Back type outlet box Through type outlet box Angle type outlet box None 893. Name the type of conduit accessory shown in the figure. Deselect Answer Solid conduit elbow Inspection conduit elbow Solid conduit "Tee" Inspection conduit "Tee" None 894. . Name the part indicated as 'X' in the Distribution board shown in the figure? Deselect Answer Earth Terminal Neutral link Enclosure lock nut Fixing screw None 895. What is the specifica tion of the terminal connector shown in the figure? Deselect Answer 6 amperes, , 6 way, 250 V terminal connector 16 amperes, 6 way, 500 V terminal connector 16 amperes, 6 way, 250 V terminal connector 32 amperes, 6 way, 500 V terminal connector None 896. A terminal connector is shown in the figure. What is the specification of this terminal connector? Deselect Answer 6 amperes, 12 ways, 250 V 16 amperes, 12 ways, 250 V 30 amperes, 12 ways, 500 V 32 amperes, 12 ways, 500 V None 897. Name the electrical accessory shown in the figure? Deselect Answer Terminal connector Fuse cut out Earth Terminal Neutral link None 898. To reduce the length of cable in a wiring installation having same number of points and wired in loop in terminal system, one of the following wiring accessories is Deselect Answer Two way switch Intermediate switch Two plate ceiling rose Three plate ceiling rose required. Identify the accesory. None 899. It is mandatory to use Underwriter's knot in one of the accessories to avoid accidents. Name the accessory? Deselect Answer Ceiling rose Batten holdeR Bracket holder 3 pin plug None 900. Which one of the following electrical accessory is required to provide with Underwriters Knot? Deselect Answer Two way switch Ceiling rose Intermediate switch Batten holder None 901. Which one of the following is controlling accessory? Deselect Answer Kit-kat fuse Ceiling rose Intermediate switch Socket None 902. Which electical accessory comes under the controlling accessory calssification? Deselect Answer 3 pin wall socket 16 A/240 V Two way switch flush type 6 A/240 V Batten lamp holder 6 A/240 V Rewireable fuse 5 A None 903. The standard current ratings of the socket accessories are..... Deselect Answer 6,16 and 32 amperes 5,16 and 32 amperes 5,15 and 32 amperes 6,15 and 32 amperes None 904. What type of conduit accessory shown in the figure? Deselect Answer Main switch Distribution Board Iron clad cut-out Fuse unit None 905. Name the type of metal conduit outlet box shown in the figure ? Deselect Answer Inspection conduit bend Solid conduit bend Inspection conduit elbow Solid conduit elbow None 906. What is the name of the accessory shown in the figure? Deselect Answer Back type outlet box Angle type outlet box T type outlet box Through type outlet box None 907. The SPT switch stands for.... Deselect Answer Single Phase Tumbler switch Single Power Tumbler switch Single Pole Tumbler switc 6/9 Single Pole Tough switch None 908. In a tunnel wiring, the type of switches used is Deselect Answer SPT switch ) T.W. switch I.M. switch P.B. switch None 909. Name the type of switch shown in the symbol below figure? X Deselect Answer 3 way distribution board way distribution board 3 way fuse cut out Triple pole Iron clad switch None 910. The number of terminals available in an intermediate switch is..... Deselect Answer 2 3 4 5 None 911. The voltage rating of TPIC switch is.... Deselect Answer 400 V 415 V 440 V 450 V None 912. he current rating of double pole iron clad switch is from... Deselect Answer 15 A ro 200 A 16 Aro 220 A 16 A ro 200 A 15 A to 250 A None 913. Deselect Answer None 914. Three pin plug for light circuit rated as..... Deselect Answer 6 A, 250 V 6 A, 240 V 6 A, 230 V 6 A, 220 V None 915. The time (period) taken by a fuse to interrupt the circuit in the event of a fault is known as.. Deselect Answer Current rating Fusing current Cut-off factor Fusing factor None 916. . Which safety device is used for the purpose of protecting the circuit? Deselect Answer Fuse Contactor Adopter Socket None 917. The fuse blows off by. Deselect Answer Arcing Burning Melting Sparking None 918. HRC full form is...... Deselect Answer High Rating Capacity High Rupturing Capacity High Rating current High Rupturing Current None 919. Which type of fuse is shown in the figure? Deselect Answer Re-Wirable fuse High rupturing capacity fuse Cartridge fuse Kit-kat type fuse None 920. The fusing factor of HRC fuse is Deselect Answer 2.0 1.4 1.7 1.1 None 921. The fusing factor of a HRC fuse is Deselect Answer ) 1.1 1.7 1.4 2.0 None 922. What is the fuse rating that can be selected for a 10 H.P. induction motor? Deselect Answer 10 amperes 15 amperes 20 amperes 25 amperes None 923. A fuse is... Deselect Answer Always connected in series with the circuit Always connected in parallel with the circuit Normally connected in series with the circuit Normally connected in parallel with the circuit None 924. The material used for the fuse wire should be of.. Deselect Answer Low resistivity and high melting point High resistivity and high melting point High resistivity and low melting point Low resistivity and low melting point None 925. . For motor circuit fuses are rated as.. Deselect Answer Thrice the full load current of the motor Starting current of the motor No load current of the motor None 926. The main function of fuse is to.. Deselect Answer Protect the line Prevent excessive current Protect the appliance Open the circuit None 927. Which among these is/are the main characteristics of a fuse element? Deselect Answer High conductivity Low conductivity Maximum deterioration due to oxidation High melting point None 928. The rating of fuse is always expressed in Deselect Answer volts amperes ampere-volts ampere-hours None 929. H.R.C. fuse provides best protection against. Deselect Answer short circuit ( overload Reverse current open circuits None 930. We connect the fuse in... ( Deselect Answer Phase line ) Neutral line Earth line None of these None 931. Which of the following is not a type of fuse? Deselect Answer HRC Semi enclosed rewirable Ceramic None of these None 932. A pendant lamp holder is Deselect Answer Fitted at an angle to the wall Fitted against ceiling at right angle Fitted at right angle to the wall Hanged with the ceiling rose through flexible wire None 933. For hanging lights in the ceiling, the holder used is... Deselect Answer Batten holder Screwed holder Pendant holder Bracket holder None 934. A circuit breaker normally operates..... Deselect Answer when the power is to be supplied when the line is to be tested when the switch is to be put on whenever fault occurs in the line None 935. The fluids used in circuit breakers should be of Deselect Answer high dielectric strength and thermal stability non inflammability arc extinguishing ability all of the above None 936. In circuit breakers, oil as quenching medium has the advantage of...... Deselect Answer goo cooling properties and absorption of arc energy high dielectric strength acting as an insulator all of the above None 937. In a circuit breaker, the current that exists at the instant of contact separation is called the......current. Deselect Answer restriking breaking arc recovery None 938. Which of the following circuit breakers is generally used in Railway electrification? Deselect Answer Air blast circuit breaker Minimum oil circuit breaker bulk oil circuit breaker SF circuit breaker None 939. Main purpose of oil in OCB is to Deselect Answer provide insulation provide cooling of contacts quenching arc none of the above None 940. In a minimum oil circuit breaker, the oil is used..... Deselect Answer to act as circuit breaking medium only for circuit breaking and providing Insulation for providing insulation only for none of the above purposes None 941. What is the preferred type of "circuit breaker" to be installed in extra high voltage A.C. System? Deselect Answer Bulk oil type circuit breaker Air blast circuit breaker Vacuum circuit breaker Sulphur hexafluoride (SF) circuit breaker None 942. Which of the following circuit breakers has high reliability and negligible maintenance? Deselect Answer Air blast circuit breaker SF, circuit breaker Oil circuit breaker Vacuum circuit breaker None 943. Which of the following circuit breakers take minimum time in installation? Deselect Answer Air blast Minimum oil Bulk oil Sulphur hexafluoride (SF None 944. The main purpose of filling oil in a circuit breaker is: Deselect Answer to produce insulation effect to stop the ionisation of the surrounding air to ensure the operation of the device at a low temperature to suppress the sparking produced across the connector at the time of breaking a circuit. None 945. In circuit breakers the device used for tripping the line in the event of short-circuit is of..... Deselect Answer magnetic thermal magnetic and thermal low voltage. None 946. The circuit breaker which does not contain any serviceable part is known as: Deselect Answer oil circuit breaker (OCB) miniature circuit breaker (MCB air circuit breaker (ACB) air blast circuit breaker (ABCB) None 947. the Short circuit protection is provided in circuit breaker by..... Deselect Answer Magnetic and thermal release Thermal release Magnetic release Low voltage release None 948. In an installation, leakage current of smaller magnitudes causes....... Deselect Answer frequent tripping of ELCB electric shock fire hazard excessive billing of energy None 949. Miniature circuit breaker (MCB) are used in domestic and commercial installations for control and protection. What is the range of current rating of single pole MCBS commercially available? Deselect Answer 2.0 to 6 amps 0.5 to 60 amps. 1.0 to 62 amps. 6.0 to 32 amps. None 950. Miniature circuit breakers (M.C.B.) are used in domestic and commercial installations for control and protection. The current rating of double pole and triple pole MCB is.... Deselect Answer 2.0 to 6 amperes 0.5 to 60 amperes ( 5.0 to 60 amperes 6.0 to 100 amperes None 951. Current rating of MCB selected for an air conditioner of 1 ton is.... Deselect Answer 10/15 amperes 15/20 amperes 10/20 amperes 15/30 amperes None 952. temperature. M.C.Bs. are normally rated ambient Deselect Answer 25°C 35°C 45°C 40°C None 953. Which one of the following is not applicable to MCB? Deselect Answer ) Tamper proof as they are sealed Used for close excess current protection Used for control as well as to protect the circuit Used for coarse excess current protection. None 954. Which device can be used as switch and as well as protective device? Deselect Answer Triple pole iron clad switch Intermediate switch Miniature circuit breaker Earth leakage circuit breaker None 955. . ELCB stands for........ Deselect Answer Electrical Leakage Circuit Breaker Earth Leakage Current Breaker earth Leakage Circuit Breaker Electrical Line Circuit Breaker None 956. The ELCB expansion form is Deselect Answer Earth Leakage Circuit Breaker Earth Leakage Control Breaker Earth Leakage Current Breaker Earth Leakage Component Breaker None 957. Earth Leakage Circuit Breaker (ELCB) works on the principle of Deselect Answer over load current short circuit current residual current neutral current None 958. What is the name of PPE? Deselect Answer Nose mask Head shield Face shield Hand screen None 959. What is the name of wiring method? Deselect Answer Joint box method Looping back method Loop in method using 3 plate ceiling rose Loop in method using 2 plate ceiling rose None 960. What does the symbol marked X indicate? Deselect Answer Number of wires run on the limb Number of switches to be connected Number of battern (or) pipe to be fixed Number of clamps (or) clips to be fixed None 961. What is the name of the diagram? Deselect Answer Staircase wiring Godown wiring Hostel wiring Tunnel wiring None 962. What is the type of relay? Deselect Answer Impulse relay Dry reed relay Latching relay Electromagnetic relay None 963. What is the type of wiring? Deselect Answer CTS wiring Cleat wiring PVC conduit wiring PVC casing and capping wiring None 964. What is the application of the wiring circuit? Deselect Answer Two lamps dim operation only Two lamps controlled by one switch Two lamps controlled by two switches One lamp bright and two lamp dim operation None 1 out of 97 Name Phone Time's upTime is Up!
