Journeyman Electrician Practice Test- 12
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Journeyman electrician exam free practice test – 12
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Question 1 of 15
1. Question
1 pointsIn an electric circuit, the drop in the feeders should not exceed …………..
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Question 2 of 15
2. Question
1 pointsAn electric circuit draws 200 VA of apparent power and 120 Watts, how much reactive power in VAR does the electric circuit draws.
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Question 3 of 15
3. Question
1 pointsWhat is the minimum watts required per sq ft of floor area to determine the minimum number of lighting branch circuits
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Refer : NEC 202.2
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Question 4 of 15
4. Question
1 pointswhich of the following motor should never be used on a machine that is hard to start?
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Question 5 of 15
5. Question
1 pointsIf a motor is connected on 120 Volts electrical circuit, which of the following disconnecting switch is used?
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Question 6 of 15
6. Question
1 pointsIf the motor is larger than 2HP. the disconnecting switch must be rated in horsepower not less than the horse power rating of the motor.
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Question 7 of 15
7. Question
1 pointsIf time delay fuses are used as short circuit protection for motors, the protection rating of fuse can be ……………. percentage of rated current of power.
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Question 8 of 15
8. Question
1 pointsHow many 10 THHN conductors can be installed in trade size 1 EMT?
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Refer: NEC Annexure C Table C.1
Total 16 THWN 10 AWG conductors can be pulled in trade 1 EMT.
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Question 9 of 15
9. Question
1 pointsWhat size service conductors are required for a dwelling load with a calculated load is 190 A. The service disconnect breaker is rated at 200 A?
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Answer : 2/0 AWG
Note : Service conductors that supply individual dwelling unit or single dwelling unit can have ampacity rating of 83% of service disconnect.
The service conductor ampacity for 200 A service disconnect = 0.83 * 200 = 166 amperes
Refer : NEC Table 310.15(B)(16)
2/0 AWG with ampacity 175 amperes ( 75 C) is suitable as service conductor
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Question 10 of 15
10. Question
1 pointsWhich is the minimum size copper conductor is required for the grounding electrode conductor (GEC) connected to a ground rod
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Refer : NEC [250.166(A)].
Minimum Size Grounding Electrode conductor:
8 AWG Copper
6AWG Aluminium
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Question 11 of 15
11. Question
1 pointsWhich of the following device is required to detect and protect against arcing in 15- and 20-amp branch circuits supplying outlets installed in dwelling units?
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Refer: NEC 210.12(A)
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Question 12 of 15
12. Question
1 pointsThe voltage shall not be greater than ………….. to supply listed electrical discharge lightening in dwelling units, hotels and motels?
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Refer: NEC 210.6(A)
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Question 13 of 15
13. Question
1 pointsWhat is the maximum rating of overcurrent devices protecting panelboard supplying potential transformers?
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Refer: NEC 408.52
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Question 14 of 15
14. Question
1 pointsThe overhead service conductors where the voltage does not exceed 300 volts passes over a residential property, drive-ways not to subject to truck traffic must have a minimum clearance of ……………
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Refer: NEC 230.24 (B)(2)
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Question 15 of 15
15. Question
1 pointsThe live parts of the motor operating at 120 volts must be guarded.
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Refer: NEC 430.232