Journeyman Electrician Practice Test 8
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Free online quiz practice test on journeyman electrician exam-8 which includes NEC Questions and basic electrical theory questions.
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Question 1 of 15
1. Question
1 pointsThe cross sectional area of the conductors permitted in a seal shall not exceed ………………. percent of the cross sectional area of a rigid metal conduit of the same trade size.
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Refer: NEC 501.15[C][6]
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Question 2 of 15
2. Question
1 pointsCircuits are equipment operating at less than 50V shall have a lamp holders of rating not less than ………………….. watts.
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Incorrect
Refer: NEC 720.5
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Question 3 of 15
3. Question
1 pointsThe outline lighting system shall be at least ………….. feet above the areas accessible to vehicles unless protected from physical damage.
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Incorrect
Refer: NEC 600.9 [A]
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Question 4 of 15
4. Question
1 pointsA solidly grounded system is the system grounded with high value of resistor or impedance.
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Incorrect
Refer : NEC 100 [Definitions]
Solidly grounded system means direclty connected to ground with out any resistance or impedance. -
Question 5 of 15
5. Question
1 pointsThere shall be at least ………… mm airspace between wall and the door of any cabinet containing current carrying conductors whose operating voltage is less then 250 volts.
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Incorrect
Refer : NEC 312.11
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Question 6 of 15
6. Question
1 pointsThe maximum recommended voltage drop in feeder circuit is ………………………….. percentage
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Refer : NEC 215.2(A) Note (2)
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Question 7 of 15
7. Question
1 pointsWhat size THWN conductor is required for a 35A circuit?
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Incorrect
Refer: NEC 110.14[C][1]
If the equipment rating is less than 100A . So the conductor sizes are 600C column in Table 310.15(B)(16)
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Question 8 of 15
8. Question
1 pointsWhere a fuse used as single phase motor overload protection, it shall be inserted in each ……………… conductor.
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Incorrect
Refer : NEC 430..36
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Question 9 of 15
9. Question
1 pointsFor conductors used in overhead service less than 600 volts shall have a vertical clearance of ………….feet above the roof surface with out any exception.
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Incorrect
Refer: NEC 230.24
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Question 10 of 15
10. Question
1 pointsA Residence has less than 2 branch circuits, what is the minimum size of 3 wire service required?
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Refer : NEC 230.79(B)
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Question 11 of 15
11. Question
1 pointsWhich of the following circuits shall not be connected to system containing trolley wires?
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Refer: NEC 110.19
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Question 12 of 15
12. Question
1 pointsHow many types of 5 wire feeders shall be permitted to utilize a common neutral?
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Incorrect
Refer: NEC 215.4
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Question 13 of 15
13. Question
1 pointsWhat is the smallest size copper wire required for a service entrance conductor supplying limited loads of a single branch circuit?
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Incorrect
Refer: NEC 230.31 ( B)
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Question 14 of 15
14. Question
1 pointsAn electrical circuit feeding two single phase motors with a full load current rating of 50 amperes, 30 amperes respectively. Which of the following is the required dual element time-delay fuse size?
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Incorrect
Refer: NEC Table 430.52
The fuse size should be 175% of full load current rating of largest motor plus sum of all other small motors full load current rating.
Dual element fuse size: 1.75 * 50 + 30 = 117.5 amperes
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Question 15 of 15
15. Question
1 pointsWhich of the following shows that the circuit is opened?
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