Journeyman Electrician Practice Test-17
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Question 1 of 15
1. Question
1 pointsThe minimum distance that service drop wire should maintain if it is placed above the roads and driveways is ……………..
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Question 2 of 15
2. Question
1 pointsThe non motor operated appliance rating is 20 amperes which is supplied by a single branch circuit. what is the minimum ampere rating of branch circuit?
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Branch circuit should be rated 125% of rated current of appliance.
minimum branch circuit rating = 20 * 1.25 = 25 amperes
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Question 3 of 15
3. Question
1 pointsEvery appliance must be provided with a disconnecting means from the circuit for repairing it safely.
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Question 4 of 15
4. Question
1 pointsA 4500 watt water heater is operated at 240 volts, what is the size of branch circuit that can be used for connecting it?
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Current consumes = 4500 / 240 = 18.75
branch circuit rating = 18.75 * 125% – 23.44 = neaest(25 amp)
10 AWG size wire is suitable. -
Question 5 of 15
5. Question
1 pointsIf only one room air conditioner is connected to a branch circuit, the maximum name plate rating of equipment should not exceed ………… % of the circuit.
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Question 6 of 15
6. Question
1 pointsA reliable conductor to ensure the required electrical conductivity between metal parts required to electrically connected is termed as ………………….
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Refer: NEC 100.1 General Definitions
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Question 7 of 15
7. Question
1 pointsThe total current delivered by two series connected batteries is 2 A, what is the carrying current of each battery?
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In series connection the current flow will be same
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Question 8 of 15
8. Question
1 pointsIf the leakage factor of 10 KW motor is 1.2, what is the leakage factor of a 20 KW electric motor?
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Question 9 of 15
9. Question
1 pointsThe most suitable motor for commercial refrigerator is ……………………………
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Question 10 of 15
10. Question
1 pointsone watt is equal to ……………………..
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Question 11 of 15
11. Question
1 pointsThe minimum size copper equipment grounding conductor for a 100 amperes circuit is …………….
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Refer: NEC Table 250.122
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Question 12 of 15
12. Question
1 pointsHow many number of service disconnects per service are allowed to be grouped in any one location?
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Refer: NEC 230.71 (A)
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Question 13 of 15
13. Question
1 pointsWhat is the maximum size fuse allowed to protect 12 AWG THW copper branch conductor?
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Refer: NEC 240.4 (D) (5)
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Question 14 of 15
14. Question
1 pointsThe maximum wattage of incandescent-lamps must not exceed …………… that may be used on medium bus lampholders.
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Refer: NEC 410.103
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Question 15 of 15
15. Question
1 pointsUnder normal conditions, how should be the voltmeter is connected to measure the voltage of the circuit or device?
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