Journeyman Electrician Practice Test37
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Free Online Practice Test on Journeyman Electrician Exam – 37
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Question 1 of 10
1. Question
1 pointsWhich of the following is not a nominal system voltage that should be used to compute branch circuit, feeder and service calculations?
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Refer : NEC 220

Question 2 of 10
2. Question
1 pointsA 75 feet service is connected between 120/240 volts single phase feeder and a panel board. What is the voltage at panel board if the operating current of service is 60 amperes and resistance of service conductor is 0.2 ohms per 1000 feet?
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R = 0.2/1000 * 75 = 0.015 ohms
Voltage drop = I * R = 60 * 0.015 = 0.9 volts
Voltage a t panel board = 240 – 0.9 = 239.1 volts 
Question 3 of 10
3. Question
1 pointsWhat is the maximum demand for four wallmounted ovens, house hold electric ranges and other house hold cooking appliances rated at over 1 ¾ KW each?
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Refer : ( NEC Table 220.55)

Question 4 of 10
4. Question
1 pointsA 12 volts battery is connected group of four parallel resistors each with 4 ohms. How much current does the circuit draws from the battery?
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Total resistance = 1 ohm
Current = V / R = 12/1 = 12 Amperes

Question 5 of 10
5. Question
1 pointsA lamp with wattage of 20 watt draws 0.5 ampere current. What is its operating voltage?
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Operating Voltage = P / I
= 20/0.5 = 40 volts 
Question 6 of 10
6. Question
1 pointsWhat is the corrected ampacity of a 2/0 THWN conductor in a dry location, If the ambient temperature of the location is 45^{0} C?
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The Ampere rating of 2/0 THWN conductor in wet location (90^{0}C) = 195 Amperes ( NEC Table 310.15(B)(16)
Ambient correction factor at 45^{0}C = 0.87 ( NEC Table 310.15(B)(2))
Corrected Ampacity = 0.87 * 195 = 169.65 = 170 Amperes

Question 7 of 10
7. Question
1 pointsTank storage installations inside buildings below grade level are classified as ……………….
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Refer : NEC Table 515.3

Question 8 of 10
8. Question
1 pointsA device which converts DC input into AC output is called as ……………………
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Question 9 of 10
9. Question
1 pointsWhich of the following is the minimum length of raceway that the conductor ampacity adjustment factors can be applied?
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Refer : NEC 310.15 (B)(2)(a)

Question 10 of 10
10. Question
1 pointsType ITC cables cannot be used in the circuits operating more than ………….. amperes at 150 volts?
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