Journeyman Electrician Practice Test 1

Question 1: For stationary small motors rated less than .................., the branch circuit over current device  may serve as a controller.

• 1/2 horsepower
• 1/ 8 horse power
• 1 horsepower
• 5 horse power

NEC Reference: NEC 430.81

Question 2: A 440 volts motor has a full load current of 34 amperes. what size disconnecting means is required?

• 45 amperes
• 34 amperes
• 50 amperes
• 40 amperes

NEC Reference: NEC 440.12(A)(1)

Question 3: If the panel board rating is 100 amperes, what shall be the over current device rating located in panel board?

• 125 amperes
• 100 amperes
• less than 100 amperes
• greater than 100 amperes

NEC Reference: NEC 408.36

Question 4: Underground wiring shall be installed in which of the following conduit

• Threaded rigid metal
• Threaded steal intermediate metal
• PVC
• All options are correct

NEC Reference: NEC 515.8

Question 5: What is the minimum size of THWN conductors required for single phase 10 HP motor  connected to 240 volts supply?

• 4 AWG THWN Copper
• 6 AWG THWN Copper
• 8 AWG THWN Copper
• 10 AWG THWN Copper

NEC Reference: NEC 430.248

Question 6: All 15,20 amperes receptacle outlets installed in bathrooms of dwelling units shall always require ...........................................

• water proof receptacles
• protective guards
• Ground fault circuit interceptor
• over current protection device

NEC Reference: NEC 210.8(A)(1)

Question 7: What is the minimum size secondary conductor required for a 2 wire 480 volts/ 120 volts transformer rated at 2.3 KVA with 75⁰C temperature at terminals?

• 14 AWG
• 12 AWG
• 10 AWG
• 8 AWG

NEC Reference: NEC 19.16

Question 8: What is the low voltage contact limit for sinusoidal AC?

• 15 Volts RMS
• 18 Volts RMS
• 16 Volts RMS
• 10 Volts RMS

Question 9: Flexible cards may not be used in the following locations ..........

• wiring of luminaries
• cranes
• Elevator cables
• To replace a fixed wiring of a structure

NEC Reference: NEC 400.7

Question 10: When branch circuits used at outside, the size of overhead conductors for 600 volts or less, for spans upto 50 feet, shall not be less than ............. copper.

• NO 18
• NO 12
• NO 10
• NO 8

NEC Reference: NEC 225.6(A)(1)

Question 11: The following materials shall not be used as Grounding electrodes.

• Copper
• Metal
• Aluminum

NEC Reference: NEC 250.52

Question 12: In a metal wire-ways, the distance between supports shall not exceed .............. ft.

• 10
• 5
• 15
• 8

NEC Reference: NEC 376.30(A)

Question 13: What is the resistance of the conductor if the conductor voltage drop is 3.6 volts and current flowing through conductor is 18 amperes?

• 0.2 ohms
• 2 ohms
• 0.5 ohms
• 5 ohms

Question 14: When an electrical circuit tested with ohmmeter, a short circuit is indicated by a reading of ......................

• 100 ohm
• Zero
• infinity
• half of the voltage in circuit

Question 15: What is the resistance of 80 watt Light bulb rated at 120 volts?

• 180 ohms
• 1.5 ohms
• 54 ohms
• 120 ohms

Question 16: If two 4 ohm resistors are connected in series which are powered by 240 volts power source, what is the current flow across one 4 ohm resistor?

• 30 amperes
• 15 amperes
• 120 amperes
• 60 amperes

Question 17: What is the demand factor applied  in calculating feeder or service conductor load for a commercial kitchen having four electrical equipment

• 100 %
• 90 %
• 80 %
• 75 %

NEC Reference: NEC 220.56

Question 18: When the single phase air conditioner rating is less than .......... at 240 volts can be considered as single motor unit in determining branch circuit conditions.

• 30 amperes
• 40 amperes
• 50 amperes
• 60 amperes

NEC Reference: NEC 440.62(A)

Question 19: If a 230 volts load is connected to 240 volts power source, what is the minimum voltage that can be supplied to load as recommended by NEC?

• 228 volts
• 240 volts
• 230 volts
• 235 volts

Question 20: For a 300 ampere electrical circuit, what is the minimum size copper equipment grounding conductor as per NEC?

• 6 AWG
• 4 AWG
• 8 AWG
• 10 AWG

NEC Reference: NEC 250.122