Journeyman Electrician Practice Test -19
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Free online journeyman exam practice test – 19 (NEC and basic Electrical Engineering)
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Question 1 of 10
1. Question
1 pointsIf the total ampere of house is 30 which has three branch circuits, what is the minimum size of a branch circuit wire that can be used?
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Note: if the total load is 30 ampere and if it has three or more branch circuits use 60 amp switch and and No.6 wires.
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Question 2 of 10
2. Question
1 pointsThe distance between service pole and the house building is 120 ft. what is the minimum overhead span wire size?
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Refer : NEC Sec, 224.6(a)
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Question 3 of 10
3. Question
1 pointsThe emergency power supply in hospital should provide full power within …………. sec of normal power failure.
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Question 4 of 10
4. Question
1 pointsIf the battery bank is used as emergency supply, the battery must be of size that will supply the load for a minimum of ………. hours
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Question 5 of 10
5. Question
1 pointsThe equivalent of 86 0 F in degree centigrade is ……………………. 0 C.
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Sol : First subtract 32 from the 86 i.e = 86 -32 = 54.
multiply 54 by 5/9 = 54 * (9/5) = 270 / 9 = 30 0C -
Question 6 of 10
6. Question
1 pointsIf five mobile homes are connected to one feeder with an assumed load of 16000 watts each, at 115/230 volts, what is the minimum ampacity of the wires in a feeder circuit?
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Sol : For five mobile homes The demand factor is 33 % ( Table NEC 550 . 31)
16000 * 5 * 0.33 / 230 = 115 amp -
Question 7 of 10
7. Question
1 pointswhat is the power required for lighting the 800 sq ft apartment?
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3 watts of power is required per sq ft for lighting purpose.
so 800 * 3 = 2400 watts. -
Question 8 of 10
8. Question
1 pointswhat is the minimum clearance between two single peace of electrical equipments which are in same sight?
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Question 9 of 10
9. Question
1 pointsWhich of the following electrical switching device is utilized to isolate a circuit or equipment from the power supply?
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Question 10 of 10
10. Question
1 points…………………………….. is the integral part of the motor which protects the motor from over heating.
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