Electrical Exam Questions PDF

1. What’s the minimum insulated temperature of branch circuit insulted conductor located within 75 mm of a ballast within ballast compartment? a. 90c b. 120c c. 180c d. 60c 2. What’s the maximum overcurrent protection for a 12 awg conductor in a commercial lighting system? a. 60 amps b. 90 amps c....

1. What’s the minimum insulated temperature of branch circuit insulted conductor located within 75 mm of a ballast within ballast compartment? a. 90c b. 120c c. 180c d. 60c 2. What’s the maximum overcurrent protection for a 12 awg conductor in a commercial lighting system? a. 60 amps b. 90 amps c. 40 amps d. 20 amps 3. If a sling is damaged what would you do? a. Find the necessary tools to repair it b. Report it to your super so it can be replaced c. Put electrical tape on it d. Replace it 4. What’s the maximum ampacity allowed for bud iuninary? a. 40 amps b. 60 amps c. 50 amps d. 30 amps 5. What’s the maximum distance for support of a non metallic sheathed cable? a. 1.0 m b. 1.2 m c. 1.5 m d. 2.0 m 6. What will happen in a re alarm system remove elr? a. Alarm sounds b. Trouble light c. Malfunctions d. Buzzing sound 7. When you cannot be found in electrical code book, who will make the decision? a. The electrician on site b. The supervisor c. The foreman d. The general contractor 8. In the kitchen what’s the minimum distance between the sink and g protected receptacle? a. 1.5 m b. 1.8 m c. 1.2 m d. 1.6 m fi fi 9. In the kitchen what is the minimum distance between a plug and bathtub or shower? a. 600 mm b. 500 mm c. 900 mm d. 1000 mm 10. A ladder able tray would you use to support? a. Metal sheaths b. Weak rods c. Support beams d. Threaded rod 11. What’s the minimum distance between communication conductor and electric lighting circuit operators at 300 volts? a. 90 m b. 100 m c. 50 m d. 80 m 12. What’s the minimum distance between communication conductor and electric lighting circuit operators at 347 volts? a. 600 mm b. 900 mm c. 800 mm d. 1000 mm 13. What’s is the minimum separation distance between class 2 circuit contractor and insulated contractor of electric light power operator at 300 V? a. 60 mm b. 90 mm c. 80 mm d. 50 mm 14. What is the lling for wire way containing only signal and control conductors? a. 20% b. 30% c. 40% d. 50% 15. Two EMT conduits 21mm and 27mm run on common supports. How many supports required for 45m run? a. 20 b. 26 c. 29 d. 30 16. What type of enclosure used in blast meet freezer? a. 3S b. 3X c. 6 d. 12 fi 17. What kind of communication cable shall be permitted to be run in a plenum air return duct? a. AC-90 b. CMP c. CMH d. CMK 18. What is the box enclosure use when corrosive gas is presented? a. 2 b. 3X c. 5 d. 6 19. Which diagram is correct for 48 V batteries connection? a. A b. B c. C d. D 20. What enclosure use when install photo cell in car wash? a. 6 b. 5S c. 4X d. 2 21. How many receptacals in the plan? a. 16 b. 18 c. 38 d. 40 22. What is the depth for a cable running under a driveway and having metal sheath if the voltage less than 750V? a. 450mm b. 600mm c. 750mm d. 1000mm 23. What is the minimum size of conductor in cathodic system permitted for instrumentation needs? a. 14AWG b. 12AWG c. 10AWG d. 8AWG 24. What is the procedure when terminating 250 kcmil AL ground conductor to copper water pipe? a. Clean, sand down, install clamp, apply compound and do termination b. Apply compound, clean, install clamp and do termination c. Install clamp, do termination, apply compound d. Clean, apply compound, install clamp and do termination 25. What is the tightening torque for 600 kcmil lug and split bolts hexagonal head using external drive wrench? a. 31.1 Nm b. 42.4 Nm c. 93.2 Nm d. 113.0 Nm 26. What is the burial depth for grounding plate 120/240 V system? a. 600mm b. 900mm c. 1000mm d. 1500mm 27. What is correct WHMIS symbol for battery acid? a. A b. B c. C d. D 28. What is the voltmeter reading? A. 0v B. 10v C. 120v D. 240v 29. What is the wire size at the point “B”? a. 14AWG b. 12AWG c. 10AWG d. 8AWG 30. What is the minimum wire size laid in raceway? a. 22AWG b. 18AWG c. 19AWG d. 16AWG 31. What is the minimum wire size that can be pulled into raceway? a. 22AWG b. 19AWG c. 16AWG d. 14AWG 32. What is the size of conductor in integral assembly of HVAC system? a. 24AWG b. 22AWG c. 20AWG d. 19AWG 33. How many conductors in PVC conduit at point X? a. 2 b. 3 c. 4 d. 5 34. What is the correct diagram for the transformers? a. A b. B c. C d. D 35. Tree transformers been service, one broken is taken away. Each transformer is 125KVA. What is a new KVA? a. 125 KVA b. 216 KVA c. 250 KVA d. 375 KVA 36. What cable can be used with uninsulated bonding wire in basic care area? a. THEC b. AC-90 c. NMWU d. RG-6 37. When can the temporary wiring be change over interconnection to the permanent wiring? a. By general contractor b. By special permission c. By electrical supervisor d. By owner 38. A three phase 50 HP 575 VAC motor, what is the ampacity for conductor? a. 48A b. 52A c. 65A d. 70A 39. Refrigerator plug to dedicated circuit, when plug in to the receptacle power fails. What is cause? a. AFCI b. White and black wires reversed c. Neutral is sheared with dishwasher d. Bonding wire is not connected 40. A four meters elevated platform, what is protected worker bellow? a. Orange pylon b. Guard rails c. Fall arrest protection d. Outriggers 41. What is conductor height for parking lot? a. 2.5m b. 3.0m c. 4.0m d. 4.5m 42. What is the box size for straight run 41mm, 53mm and 78 mm conduits? a. 246mm b. 328mm c. 424mm d. 624mm 43. In the motor junction box one phase conductor is discoloured. What is cause? a. Overload set too high b. Overload set too low c. Termination was not torque properly d. Wrong contactor size 44. The generator not been used for several months. When it starts to operate again fails after start. What is the cause? a. Governor b. Lost excitation c. Overvoltage d. Phases reversed 45. How to connect holding contact in start/stop control circuit? a. Series with the start button b. Parallel with the start button c. Parallel with the coil d. Parallel with the stop button 46. A 200HP 3 phase induction motor with SF 1.2. What is overload protection setting? a. 192 A b. 200 A c. 240 A d. 330 A 47. A 200 HP 3 phase induction motor. What is the NTD fuse? a. 400 A b. 500 A c. 600 A d. 700 A 48. What is the percentage for overload rating if service factor is 1.15 or higher? a. 110% b. 115% c. 125% d. 150% 49. How to reverse motor? a. A1-A2 b. S2-S1 c. F1-F2 d. S1-F1 50. What are the voltmeters reading if fuse 2 is blown? a. V1=0V, V2= 208V, V3=0V, V4=208V b. V1=208V, V2= 208V, V3=0V, V4=208V c. V1=0V, V2= 208V, V3=0V, V4=0V d. V1=208V, V2= 208V, V3=208V, V4=208V 51. What is the minimum number of stair way risers in dwelling unit to use three-way switch? a. 2 b. 3 c. 4 d. 5 52. An outdoor dumper has 75% open command from 4mA to 20mA signal. What does the signal read? a. 16.0 mA b. 17.0 mA c. 18.5 mA d. 20.0 mA 53. What must be used to supply smoke alarm in a single-family dwelling unit? a. GFCI b. AFCI c. Lighting circuit d. Receptacle circuit 54. What is the maximum distance between supports required for trade size 16mm EMT conduit? a. 1.5m b. 2.0m c. 2.5m d. 3.0m  55. What is used to drill 8" hole in a concrete slab? a. Hammer drill b. Core drill c. Chisel d. Impact gun 56. How do you reverse a compound motor? a. Reverse feeder b. Reverse armature c. Reverse eld d. Reverse brushes 57. What is the temperature rating of the cable used in re alarm system? a. 60 C b. 75 C c. 90 C d. 110 C 58. Which symbol represent a limit switch? a. A b. B c. C d. D fi fi  59. Which type of equipment permits AC and DC power to be installed in the same unit? a. Exit sign b. Data outlet box c. Lighting relay panel d. Current transformer 60. Refer to Fig. bellow if each battery is 3 V and 30 Ah, what is the voltage and capacity of the connection? a. 6V 40 Ah b. 6 V 80 Ah c. 9 V 40 Ah d. 9 V 60 Ah 61. What is hazard when cutting metal supports components to length? a. Arc ash b. O gases c. Sharp edges d. Contaminations 62. What is the maximum distance between supports for trade size 103mm PVC conduit? a. 1.2 m b. 1.5m c. 1.8m d. 2.1m ff fl 63. Which diagram represent Class B re alarm circuit? a. A b. B c. C d. D 64. What is the minimum cover required for direct burial high voltage conductor in a vehicular area? a. 450mm b. 600mm c. 900mm d. 1000mm 65. What is the minimum clearance between unguarded life parts 14.4 KV transformer and the fence near surrounded it? a. 1.0m b. 1.1m c. 3.0m d. 3.7m 66. What do you check on a newly installed motor? a. Start momentary, check direction of rotation b. Check c. Check supply voltage d. Check motor with megger fi 67. In the re alarm system what size of conductor is permitted to use for the integral assembly of four or more conductors? a. 16AWG b. 20AWG c. 22AWG d. 26AWG 68. What is the minimum horse power (HP) for the VFD if motor has 3 phase, 575(600) V and FLC9.0A? a. 5 HP b. 7.5 HP c. 9.0 HP d. 10.0 HP 69. A600 V 3 Phase transformer 4 wires 120 V secondary winding. What does the bonding attach to? a. HO b. XO c. H1 d. X1 70. How often do you have to inspect extension cord? a. Daily b. Weekly c. Before each use d. Monthly fi 71. A Class A GFCI at what fault current will be interrupt circuit? a. 2 mA b. 4 mA c. 6 mA d. 10 mA 72. What is the minimum clearance between heated ceiling and any additional wiring located above it? a. 13 mm b. 21 mm c. 50 mm d. 75 mm 73. Refer to Fig. bellow, what is the minimum distance of point X, when installing a run of cable tray? a. 50 mm b. 150 mm c. 300 mm d. 600 mm 74. In a megger test on wire insulation, which phase fails to ground? a. 36 MO b. 0.9 MO c. 3.9 MO d. 5.5 MO 75. What is the maximum setting time for a timer in a sauna? a. 30 min b. 60 min c. 90 min d. 120 min 76. What is use to reduce harmonics? a. Sheathed cable b. Isolated transformer c. Reactor d. Capacitor 77. What is the symbol for a temperature switch (thermostat)? a. A b. B c. C d. D 78. Refer to g. bellow, when will the horn sound? a. 10 second before the motor start b. 10 second after the motor start c. 10 second before the motor stop d. 10 second after the motor stop fi 79. What is the residuum voltage permitted in photovoltaic system? a. 30 V b. 50 V c. 60 V d. 120 V 80. When must Lock-Out procedure be applied? a. When more than one person working on the equipment b. When repairs are being made to the equipment c. When the equipment is energized but not in use d. When the equipment is reenergized but not in use 81. What is the wattage per square meter for a storage warehouse? a. 5 b. 10 c. 15 d. 20 82. In 600 V 3 Phase system if the ground fault light for the Phase B came out, what is the voltage reading between phase A and phase C? a. 0 b. 240 c. 347 d. 600 83. What size of conductor is required to limit voltage drop to 2% when feeding 240v 25a load at distance 31m? a. 12 AWG b. 10 AWG c. 8 AWG d. 6 AWG 84. When determine the size of the service conductor in the 12 units apartment. What the demand factor for the load not located in the dwelling units? a. 65% b. 75% c. 85% d. 100% 85. What is the minimum conductor ampacity for emergency power supply with a re pump rated 30A and a jokey pump rated at 15 A. a. 30.00 A b. 45.00 A c. 52.50 A d. 56.25 A fi 86. Refer to Fig. bellow, what happens when initiating device indicated at 2 closes (shorted)? a. An alarm conditions b. A normal condition c. A supervisory condition d. A trouble conditions 87. How is oat switch control connected to a contactor? a. In series with a coil b. In parallel with a coil c. In series with a start button d. In parallel with a stop button 88. Which signal indicate rase load (hoist) slowly? a. A b. B c. C d. D 89. How do you connect emergency power to 347 V AC power source? a. Twist lock plug b. A plug with a cable c. A plug with a cable into a receptacle d. A permanent connection fl 90. What is the minimum working space required when installing a low voltage MCC? a. 1.0 M b. 1.5 M c. 1.7 M d. 2.2 M 91. Where do you nd information for the storage of a hazardous material and chemicals? a. Safety data sheet b. Supplier label 92. What type of enclosure would be used outside where exposed to rain and snow? a. 3 b. 4 c. 5 d. 6 93. What type of enclosure would be used in an area where it would be hosed down? a. 2 b. 3 c. 4 d. 5 fi 94. What is the maximum distance for a disconnecting means for the A/C unit? a. 3 M b. 4 M c. 7 M d. 9 M 95. What is the maximum distance for disconnecting means for central electric heater? a. 3m within sight b. In the other room c. 9m d. 9m within sight 96. What type of a lockable receptacle would be used for 3 phase 600 V 20 A 3 wires application? a. L17-30R b. 5-15R c. 5-20R d. L9-20P 97. Which authority presides over the requirements of EXIT signs? a. Canadian Electrical Code b. Local Electrical Inspection Authority c. Canadian Standard Association d. National Building Code of Canada 98. 100 A 3 copper conductors are use for a service. What is the minimum size 016 2/100007 of aluminum ground is required? a. #8 AWG b. #6 AWG c. #4 AWG d. #3 AWG 99. 600 V cable having a metal sheath is exposed to a vehicular traf c. What is the minimum burial depth is required? a. 450mm b. 600mm c. 750mm d. 900mm 100. An outdoor dumper has 85% open command from 4mA to 20mA signal. What does the signal read? a. 17.6 mA b. 13.6 mA c. 18.5 mA d. 20.0 mA fi 101. What is the maximum distance for vertical supports for #3/0 AWG copper wire? a. 10 b. 15 c. 24 d. 30 102. What is the maximum distance for supports for 21mm EMT conduit? a. 0.75m b. 1.00m c. 1.50m d. 2.00m 103. How many supports are required when trade size 16mm and trade size 27mm EMT conduits are supported for the distance of 15 M on the same rack? a. 10 b. 14 c. 15 d. 20 104. Which low voltage communication cable would you run in a plenum? a. FT1 b. FT2 c. FT4 d. FT6 105. What is the CSA con guration type of receptacle is used for a roof top maintenance service plug? a. 5-15R b. 5-20R c. 5-20RA d. 6-15R 106. What is the minimum temperature rating for a cable that run in an air handling plenum? a. 60 C b. 75 C c. 90 C d. 110 C fi  107. What is the wire rating for the conductors for a 12A re pump? a. 10A b. 15A c. 20A d. 25A 108. What is the maximum size of circuit breaker that maybe used on a HID (120V) lighting system in a commercial building? a. 15A b. 20A c. 30A d. 40A 109. At which distance shall be bonded metal pool fence? a. 0.75M b. 1.00M c. 1.50M d. 2.00M 110. What is the ampacity for the thermostat wire? a. 60% b. 75% c. 85% d. 100% fi 111. What is the minimum size of ve conductors using for re alarm system that will be pulled into raceway integral assembly? a. 16AWG b. 19AWG c. 22AWG d. 24AWG 112. When can you deviate CEC? a. Never b. Anytime when necessary c. When obtain special permission before proceeding with the work d. When working licensed electrician 113. What is the maximum spacing for warning notice on a cable tray containing high-voltage insulating conductors? a. 3M b. 5M c. 10M d. 15M fi fi 114. What is the maximum weight of a heater that can be hanging from a ceiling mounted box? a. 4.54Kg b. 13Kg c. 20Kg d. 23Kg 115. How many switches in the plan? a. 16 b. 18 c. 27 d. 30 116. Refer to gure bellow the (normally open) NO F is fused. How is the operation of the contactor affected? a. The motor will not run in the forward direction b. The motor will not run in the reverse direction c. The motor will run in the forward direction until the reverse start button is depressed d. The motor will run in the reverse direction until the forward start button is depressed fi  119. What is hazard when cutting metal using grinder? a. Arc ash b. Off gases c. Sparks d. Contaminations 120. What is the proper torque when terminating two #2/0 wires for lug and split bolt? a. 31.1 Nm b. 43.5 Nm c. 56.5 Nm d. 73.4 Nm 121. A box has 1" hole, what do you need to use to increase hole to 3”? A. A step bit B. A grinder C. A hole punch D. A le 122. Refer to Fig bellow, what is the neutral current? A. 1A B. 2A C. 4A D. 5A fi fl 131. Outdoor light is not OFF during day time. What is the cause? a. Contractor b. Breaker c. Photocell d. Lamp 132. 600 V 50 HP 3 phase motor protected by NTD fuse. What size of disconnect switch to use? a. 60A b. 100A c. 200A d. 600A 134. What is the load for 85m² oor area exclusive of the basement? a. 24,000W b. 14,000W c. 6,000W d. 5,000W 135. What is the maximum voltage drop for 48 VDC photovoltaic system? a. 1.4V b. 1.9V c. 2.4V d. 3.4V fl 136. What is the size for the circuit breaker for 120 V, 5 HP DC motor? a. 40A b. 50A c. 60A d. 75V 137. What is the minimum wire size RW75 required to feel50 HP, 575 V, squirrel cage motor? a. 1/0 AWG b. 2/0 AWG c. 3/0 AWG d. 4/0 AWG 138. What is the maximum size for the time delay fuse feeder protection of 5 HP and 10 HP induction motors? a. 25 A b. 30 A c. 35 A d. 40 A 139. What is the correction factor for 15 conductors in a raceway using for a nurse call system? a. 0.5 b. 0.6 c. 0.7 d. 0.8 140. What is done to determine overheating in a life electrical system? a. Verify voltage drop with a multi meter b. Check for infrared heat with a scanner c. Check for current draw with a clamp on meter d. Obtain temperature reading with a contact thermometer 141. When is allowable to rate overcurrent protection higher than the panel board rating? a. When more than the 90% of the panel board loads is the motor load b. When less then the 90% of the panel board loads is the motor load c. When more than the 90% of the panel board loads is the lighting load d. When less than the 90% of the panel board loads is the lighting load 142. Refer to gure below, a thermographic picture of the lighting contactor displays "Y" brighter. What is the problem? a. Contacts are fused b. Contacts are open c. Contacts are pitted d. Contacts are oversized 143. What type of protection is provided by magnetic across-set-line starter with holding contact connected in parallel with start button contacts? a. Low voltage b. Over voltage c. Low current d. Over current 144. What is the largest circuit breaker permitted for 129 V mogul based lighting branch circuit used in a commercial mall? a. 15A b. 20A c. 40A d. 50A fi 145. Which diagram represent 24 V battery connection? a. A b. B c. C d. D 146. Dielectric liquid- lled electrical equipment containing 23 L of liquid or less in one tank, or 69 L or less in a group of tanks, shall be? a. With metal pan or concrete curbing capable of collecting and retaining all the liquid of the tank or tanks b. Located at any door or window c. Located at any ventilation line or outlet d. Obstructed re ghting operation 147. If in a three-phase ground fault indication system lamp "B" is out. What is the voltage between phase b and ground? a. 0V b. 347V c. 240V d. 575V fi fi fi 148. What is the initial procedure for lock out tag out? a. Disconnect all energy sources b. Notify supervisor c. Take a break d. Start line again 149. Refer to Figure bellow, what happens if Q1 is fails in open position? a. Fuse below b. Light does not come ON c. Light remains ON d. Light pulses ON and OFF