Journeyman Electrician Practice Test 4

Question 1: The minimum spacing between wood or other combustible materials and an incandescent lamp shall be ........ inches

• 1
• 1 1/2
• 2
• 2 1/2

NEC Reference: NEC 600.9

Question 2: PVC conduit shall be permitted to use in underground wiring where it is buried under not less than ........... of cover

• 2 ft
• 3 ft
• 1 ft
• 4 ft

NEC Reference: NEC 515.8

Question 3: The size of conductors used in over head services with out any exceptions shall not be less than ............ copper.

• NO.14 AWG
• NO.12 AWG
• NO.10 AWG
• NO.8 AWG

NEC Reference: NEC 230.23(B)

Question 4: A 2 KW electric kettle takes 6 minutes to boil. how much does it cost to boil it once a day for 30 days at 21 c/kwh?

• $2.52
• 21C
• $1.25
• 42C

Question 5: In a direct current electric circuit, which of the following effect the current flow?

• resistance
• capacitance rectance
• inductive reactance
• All

Question 6: What is the delay time permitted to start emergency generators in-case of normal power supply failure?

• 10 minutes
• 20 minutes
• 15 minutes
• 5 minutes

NEC Reference: NEC 700.12

Question 7: A string of outdoor lights that is suspended between two points is called as serial lighting.

• True
• False

Question 8: The wiring conductors of two or more emergency circuits supplied from same source shall not be permitted in the same raceway.

• True
• False

NEC Reference: NEC 700.10

Question 9: What is allowable ampacity of NO.8 THWN conductor placed in a room where the ambient temperature of the room is at 42 degrees C?

• 50 amperes
• 65 amperes
• 67 amperes
• 47 amperes

NEC Reference: NEC 316.6

Question 10: Enclosures, cabinets, cut boxes installed in wet locations shall be ...............

• Weather proof
• Water proof
• air tight
• Rain tight

NEC Reference: NEC 312.2

Question 11: A 2 ft branch conductor with a resistance of 2.5 ohms is supplied with 120 V power supply. If 3 amperes current flows in the conductor then what is voltage drop across the conductor?

• 5 volts
• 7.5 volts
• 3 volts
• 2 volts

Question 12: Which of the following electrical quantity definition is the pressure required to force one ampere electrons through a one ohm resistor?

• volt
• ohm
• power
• current

Question 13: The ohm's law states that in an electrical circuit the current is ...................... proportional to resistance of the circuit.

• inversly
• directly

Question 14: Which of the following is connected in series with the load to measure the required parameter?

• watt-hour meter
• volt meter
• ammeter
• power meter

Question 15: When voltage remains constant in the circuit, to double the current flow in circuit, the resistance should be .................

• reduced to half
• doubled
• increased
• reduced to one by fourth

Question 16: A concealed conductor in electrical wiring means:

• Rendered inaccessible by the structure or finish of the building
• Easily accessible conductor
• Cable of being reached quickly
• A conductor having no cover

Question 17: A 250 amperes panel board may supply the maximum load of ……………………

• 250 amperes
• 200 amperes
• 150 amperes
• 300 amperes

NEC Reference: NEC 408.30

Question 18: For a single family dwelling unit what is the minimum allowable current rating of 3-wire service-entrance conductors?

• 120 amperes
• 100 amperes
• 150 amperes
• 200 amperes

NEC Reference: NEC 230.42(B)

Question 19: What shall be the maximum weight of the lightening fixture when it is supported only by the screw shell of the lamp holder?

• 4 pounds
• 6 pounds
• 8 pounds
• 10 pounds

NEC Reference: NEC 410.30(A)

Question 20: Small motors rated not more than …………….. may use a branch circuit over current protection device as the controller.

• 1/8 horsepower
• 1 horse power
• ¼ horse power
• ½ horse power

NEC Reference: NEC 430.81(A)