Journeyman Electrician Practice Test 34

Question 1: In an electrical circuit the fault current returns to the ground, if proper is grounding is provided.

• true
• False

Question 2: What is the maximum voltage drop that can be there in a 240 volts feeder circuit?

• 4.8 volts
• 7.2 volts
• 12 volts
• 6 volts

Question 3: What is the minimum branch circuit ampere rating for a 2 kW electric heater operating at 240 volts?

• 10.4 amperes
• 8.3 amperes
• 9.5 amperes
• 9 amperes

NEC Reference: NEC 424.3(B)

Question 4: Which of the following is the minimum ground wire size that can be used as per the code?

• No 8
• No 6
• No 10
• No 12

NEC Reference: NEC Table 250.66

Question 5: The disconnecting means is not required for the motor when its power is less than 1/8 Hp.

• True
• False

NEC Reference: NEC 430.81(A)

Question 6: if the load on electric motor is greater than the overload capacity the motor will ...................

• stall
• over speed
• draw more current
• comes to lower speed

Question 7: Which of the following electrical quantity is controlled using regulating transformer?

• voltage
• current
• power
• power factor

Question 8: Which of the following watts is equal to two Horse Power (HP) ?

• 1492 watts
• 1528 watts
• 746 watts
• 764 watts

Question 9: As per NEC , which of the following locations in which flammable vapors present?

• class I
• class II
• class III

NEC Reference: NEC 500.5(B)

Question 10: When 5 current carrying conductors grouped in a flexible card, what is conductor ampacity adjustment value?

• 90 %
• 80 %
• 70%
• 85%

NEC Reference: NEC 400.5(A)(3)

Question 11: Per NEC 210.52(B)(2), the 20-ampere small appliance branch circuits in a dwelling unit kitchen are permitted to also supply a receptacle outlet for which of the following appliances?

• Dishwasher
• Refrigerator
• Range (stove)
• Garbage disposal

NEC Reference: NEC 210.52(B)(2)

Question 12: The main bonding jumper in service equipment connects the grounded (neutral) conductor to the _____ .

• Equipment grounding conductor and the service enclosure
• The hot (ungrounded) conductor
• The utility transformer winding
• The ground rod only

NEC Reference: NEC 250.28(A)

Question 13: Per NEC 300.4(A)(1), when NM cable or other cable is run through a hole in a wood framing member and the edge of the hole is less than _____ inch(es) from the nearest edge of the framing member, a steel plate (at least 1/16 inch thick) must be installed to protect the cable.

• 1/2 inch
• 1 inch
• 1-1/4 inches
• 2 inches

NEC Reference: NEC 300.4(A)(1)

Question 14: Compared to a No. 12 AWG copper conductor, a No. 10 AWG copper conductor of the same length has _____ resistance.

• Higher resistance
• The same resistance
• Lower resistance
• Cannot be compared

Question 15: Per NEC 408.40, equipment grounding conductor (EGC) terminals in a panelboard shall be connected to _____ .

• The neutral (grounded) conductor terminal bar
• The metal enclosure of the panelboard
• The utility ground outside the building
• Nothing — EGCs are isolated in panelboards

NEC Reference: NEC 408.40

Question 16: Per NEC 430.53(A), two or more motors may be connected to a single branch circuit if each motor is rated at _____ HP or less AND the branch circuit is protected by a 20-ampere or smaller fuse or circuit breaker.

• 1/4 HP
• 1/2 HP
• 1 HP
• 2 HP

NEC Reference: NEC 430.53(A)

Question 17: What is the relationship between watts and joules?

• 1 watt = 1 joule per minute
• 1 watt = 1 joule per second
• 1 watt = 1,000 joules
• 1 watt = 1 joule per hour

Question 18: Per NEC 210.11(C)(1), the 20-ampere small appliance branch circuits required for the kitchen shall not supply _____ .

• Refrigerator receptacles
• Lighting outlets or outlets in other rooms
• Countertop receptacle outlets
• Dining room receptacles

NEC Reference: NEC 210.11(C)(1)

Question 19: Per NEC 406.9(A), receptacle outlets installed outdoors in a wet location must have an enclosure that is weatherproof _____ .

• Only when the plug is not inserted
• Whether or not a cord is plugged in (in-use cover required)
• Only when the plug is inserted
• Only during rain — standard covers are acceptable otherwise

NEC Reference: NEC 406.9(B)(1)

Question 20: In a Class I, Division 2 hazardous location (where flammable vapors are present only during abnormal conditions), which of the following wiring methods is permitted?

• Non-metallic sheathed cable (NM)
• Electrical metallic tubing (EMT) with listed fittings
• No conduit is required in Division 2
• Open wiring on insulators only

NEC Reference: NEC 501.10(B)

Question 21: A 240-volt circuit supplies a resistive load with a resistance of 30 ohms. What is the current flowing in the circuit?

• 30 amperes
• 16 amperes
• 8 amperes
• 4 amperes

Question 22: Per NEC 230.54(C), service entrance cables shall be arranged so that water _____ .

• Is directed upward into the service head
• Drains away from the cable and the building entry point
• Can enter freely since service cable is waterproof
• Is blocked by a sealed weatherproof fitting only

NEC Reference: NEC 230.54(C)

Question 23: Per NEC 310.10(A), conductors shall not be used in locations where the operating temperature will exceed the _____ of the conductor insulation.

• The minimum rated voltage of the insulation
• The temperature rating of the conductor insulation
• The ambient room temperature only
• 200°C in all cases

NEC Reference: NEC 310.10(A)

Question 24: A feeder supplies a continuous load of 40 amperes and a noncontinuous load of 10 amperes. Per NEC 215.3, the minimum feeder overcurrent protective device (OCPD) rating must be at least _____ .

• 50 amperes
• 60 amperes
• 70 amperes
• 80 amperes

NEC Reference: NEC 215.3

Question 25: Per NEC 240.21(B)(1), feeder tap conductors not more than 10 feet long shall not extend beyond the _____ they supply.

• Utility transformer
• Switchboard, panelboard, disconnecting means, or control device they supply
• Next junction box
• 10 feet beyond the feeder tap point

NEC Reference: NEC 240.21(B)(1)

Question 26: Per NEC 225.36, the disconnecting means at a separate building or structure (supplied by a feeder or branch circuit) must be _____ .

• A standard branch circuit breaker
• Suitable for use as service equipment
• A fusible disconnect rated 200A minimum
• Installed in a weatherproof enclosure only

NEC Reference: NEC 225.36

Question 27: Per NEC 440.32, where a hermetic refrigerant motor-compressor is the only load on an individual branch circuit, the branch circuit conductor shall have an ampacity of not less than _____ percent of the compressor's rated-load current.

• 100%
• 115%
• 125%
• 175%

NEC Reference: NEC 440.32

Question 28: A three-phase motor operates at 480 volts (line-to-line), draws 20 amperes per line, and has a power factor of 0.85. What is the true power (watts) consumed by the motor?

• 8,160 watts
• 14,130 watts
• 16,627 watts
• 9,792 watts

Question 29: Per NEC 210.62, at least one receptacle outlet must be installed in or directly above a commercial show window for every _____ feet (or fraction thereof) of window length.

• 6 feet
• 10 feet
• 12 feet
• 20 feet

NEC Reference: NEC 210.62

Question 30: Per NEC 110.3(B), listed or labeled electrical equipment shall be installed and used _____ .

• Only per the inspector's approval
• In accordance with any instructions included in the listing or labeling
• However the installer sees fit
• Only if no other code section applies

NEC Reference: NEC 110.3(B)