Journeyman Electrician Practice Test 5

Question 1: one KVA is equal to .............

• 1,000 volts
• 1,000 VA
• 100 VA
• 1,000 watts

Question 2: The circuit conductor resistance varies with .....................

• material
• voltage
• current
• power

Question 3: In an Electrical circuit if the current remains the same and resistance increases, the circuit will consume .............

• more power
• less power
• same power

Question 4: A 230 volts electric heater produces ............ when it is supplied by 208 volts?

• less heat
• more heat
• same heat
• none

Question 5: A reliable conductor to ensure the required electrical conductivity between metal parts required to electrically connected is termed as ………………….

• Branch conductor
• Bonding conductor
• Grounding conductor
• Coupling conductor

NEC Reference: NEC Article 100

Question 6: The demand factor is the ratio of the maximum load demand of a system to the total continuous load.

• TRUE
• False

Question 7: In a metal wire ways the distance between supports shall not exceed ..... feet.

• 10
• 5
• 15
• 8

NEC Reference: NEC 376.30

Question 8: The volume required for NO.14 conductors to be placed in a outlet box is ................. inch³

• 2.0
• 2.25
• 1.50
• 2.50

NEC Reference: NEC 314.16

Question 9: The sealing compound which seals against passage of gas or vapors through the seal fitting shall not have a melting point of less than ____________ degrees C

• 90⁰ C
• 101⁰ C
• 93⁰ C
• 108⁰ C

NEC Reference: NEC 501.15

Question 10: Except AC Generator exciters, all the constant AC voltages should inherently designed with ............................ protection.

• Ground Fault
• Over load
• over voltage
• All the above

NEC Reference: NEC 445.12

Question 11: What is the minimum voltage percentage that a storage battery should supply to emergency load in case of normal power supply failure?

• 85%
• 87 1/2 %
• 92 1/2%
• 90%

NEC Reference: NEC 700.12

Question 12: What is the minimum size copper equipment grounding conductor for a 300 – ampere circuit?

• 4 AWG
• 6 AWG
• 8 AWG
• 10 AWG

NEC Reference: NEC 250.122

Question 13: What is the maximum continuous load that can be connected on a 240 volts 30 amperes circuit using two 10 AWG conductors?

• 24 amperes
• 30 amperes
• 26 amperes
• 28 amperes

NEC Reference: NEC 210.20(A)

Question 14: What is the smallest size copper wire required for a service entrance conductor supplying limited loads of a single branch circuit?

• 12 AWG
• 8 AWG
• 6 AWG
• 10 AWG

NEC Reference: NEC 230.31

Question 15: What is the maximum size fuse allowed to protect 12 AWG THW copper branch conductor?

• 15 amperes
• 20 amperes
• 25 amperes
• 30 amperes

NEC Reference: NEC 240.4(D)(5)

Question 16: How many terminals does a potentiometer have?

• 1
• 2
• 3
• 4

Question 17: What color bands should be found on a 3201Ω resistor with a tolerance of +-1%?

• orange,red,red,brown
• orange,red,black,brown
• orange,red,red,black
• orange,red,black,red

Question 18: A transformer has an efficiency of 95 percentage which works at 120V , 3.6KVA .if the secondary voltage is 240V then what is it's rated primary current?

• 60 amperes
• 30 amperes
• 20 amperes
• 80 amperes

Question 19: A quick recovery Electric heater is rated at 4500 W and operated at 120 V, What will be the rating of circuit breaker to be used to protect it?

• 50 amperes
• 60 amperes
• 40 amperes
• 70 amperes

NEC Reference: NEC 210.20(A)

Question 20: The resistance of a No 12 conductor is 0.2 ohms with a current flow of 12 amperes. What does it cost per one year for the power loss in the conductor if the electricity cost is 8 cents per KW?

• $20.18
• $18.80
• $ 25.58
• $12.5

Question 21: When NM cable passes through a wood stud, a steel protection plate is required when the edge of the hole is less than how many inches from the nearest edge of the stud?

• 1 inch
• 1¼ inches
• 1½ inches
• 2 inches

NEC Reference: NEC 300.4(A)(1)

Question 22: What is the general lighting load in volt-amperes per square foot used for a dwelling unit load calculation?

• 1 VA per sq ft
• 2 VA per sq ft
• 3 VA per sq ft
• 5 VA per sq ft

NEC Reference: NEC Table 220.12

Question 23: What is the maximum standard overcurrent protection allowed for a No.10 AWG copper conductor?

• 20 amperes
• 25 amperes
• 30 amperes
• 35 amperes

NEC Reference: NEC 240.4(D)(3)

Question 24: When a building has more than one grounding electrode, what does NEC 250.50 require?

• Use only the best electrode and ignore the others
• All electrodes must be bonded together as one system
• Each electrode must connect to a different circuit
• Only the metal water pipe electrode is required

NEC Reference: NEC 250.50

Question 25: Power factor in an AC circuit is the ratio of .............

• Apparent power to reactive power
• Reactive power to real power
• Real power to apparent power
• Voltage to current

Question 26: A series circuit has a 120V source. One resistor has a 40V drop and a second has a 30V drop. What is the voltage drop across the third resistor?

• 70V
• 50V
• 90V
• 40V

Question 27: When only one conductor is installed in a conduit, what is the maximum fill percentage of the conduit area allowed?

• 31%
• 40%
• 53%
• 60%

NEC Reference: NEC Chapter 9, Table 1

Question 28: When calculating outlet box fill, how many conductor volumes does a single device (such as a switch or receptacle) count as?

• 0 — devices are not counted
• 1 conductor volume
• 2 conductor volumes
• 4 conductor volumes

NEC Reference: NEC 314.16(B)(4)

Question 29: In a 3-phase system, the line voltage is approximately how many times the phase voltage?

• 1.00 times (same as phase voltage)
• 1.41 times (square root of 2)
• 1.73 times (square root of 3)
• 2.00 times (double the phase voltage)

Question 30: What is the maximum number of service disconnecting means permitted at a single service location?

• 2
• 4
• 6
• 8

NEC Reference: NEC 230.71(A)