Journeyman Electrician Practice Test-31
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Free Online Journeyman Electrician Exam Practice Test – 31
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Question 1 of 10
1. Question
1 pointsWhat is the calculated load on branch circuit for 10 15 ampere receptacles in a retail store?
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Refer : NEC 220.14 (I)
Except Dwelling unit , banks, in all other units the receptacles calculated load shall not be less than 180 volt-ampere for each single.Calculated load = 10 * 180 = 1800 Volt -Ampere
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Question 2 of 10
2. Question
1 pointsHow many 20 Amp circuits are required for a 2500 sq.ft dwelling unit?
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Refer : NEC Table 220.12
the minimum general lighting load per sq.ft = 3 Volt-ampere
Total load = 2500 * 3 = 7500 volt-Ampere
(* Since it is not specified take supply voltage as 120 volts)
Total ampere rating = 7200/120 = 62.5
Total number of branch circuits = 62.5 / 20 = 3.125 or 4 circuits. -
Question 3 of 10
3. Question
1 pointsWhat is the best used conductor to carry current in electric circuit unless it is specified?
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Question 4 of 10
4. Question
1 pointsThe dis-connector switch rating for motor loads is kept lower than motor branch conductor to permit the motor to start.
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The rating should be high so that the motor can start smoothly
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Question 5 of 10
5. Question
1 pointsWhich of the following electrical parameter remains unchanged in a series electrical circuit?
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Question 6 of 10
6. Question
1 pointsAn LED light of 200W is supplied by a 120 volts electrical supply. what is the resistance ?
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P = V2 / R
R = V2 / P = 14400 / 200 = 72 ohms -
Question 7 of 10
7. Question
1 pointsThe load on cord and plug type receptacle shall not be more that ………………… % of the receptacle rating.
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Question 8 of 10
8. Question
1 pointsUnless specifically marked, which of the following is the maximum overload protection rating of No. 16 AWG copper conductor?
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Refer : NEC 240.4(D)
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Question 9 of 10
9. Question
1 pointsWhich of the following is the maximum ampacity of a No 8 THWN copper conductor at temperature 75 0 C?
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Refer : NEC Table 350.15(B)(16)
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Question 10 of 10
10. Question
1 pointsHow many transformer are needed for open – delta connection?
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