Journeyman Electrician Practice Test 37

Question 1: Which of the following is not a nominal system voltage that should be used to compute branch circuit, feeder and service calculations?

• 120
• 120/240
• 208Y/240
• 208Y/120

Question 2: A 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?

• 239.1 volts
• 240 volts
• 238.5 volts
• 238 volts

NEC Reference: NEC 239.1

Question 3: What is the maximum demand for four wall-mounted ovens, house hold electric ranges and other house hold cooking appliances rated at over 1 ¾ KW each?

• 17 KW
• 15 KW
• 10 KW
• 25 KW

NEC Reference: NEC 220.55

Question 4: A 12 volts battery is connected group of four parallel resistors each with 4 ohms. How much current does the circuit draws from the battery?

• 12 Amperes
• 3 Amperes
• 8 Amperes
• 24 Amperes

Question 5: A lamp with wattage of 20 watt draws 0.5 ampere current. What is its operating voltage?

• 40 volts
• 10 volts
• 20 volts
• 80 volts

Question 6: What is the corrected ampacity of a 2/0 THWN conductor in a dry location, If the ambient temperature of the location is 45⁰ C?

• 170 Amperes
• 188 Amperes
• 139 Amperes
• 160 Amperes

NEC Reference: NEC 310.15(B)(16)

Question 7: Tank storage installations inside buildings below grade level are classified as ……………….

• Class I Zone 1
• Class II Zone 1
• Class I Division 1
• Class II Zone 1

NEC Reference: NEC 515.3

Question 8: A device which converts DC input into AC output is called as ……………………

• Inverter
• Rectifier

Question 9: Which of the following is the minimum length of raceway that the conductor ampacity adjustment factors can be applied?

• 24 inch
• 28 inch
• 18 inch
• 20 inch

NEC Reference: NEC 310.15(B)(2)(a)

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

• 5
• 15
• 10
• 20