Journeyman Electrician Practice Test 2

Question 1: The snap switches equipped in the panel boards are rated at 25 amperes, these switches must be protected not in excess of ..........................

• 200
• 30
• 120
• 150

NEC Reference: NEC 408.36(A)

Question 2: How many 12 AWG conductors are allowed in an 12.5 in³ round octagonal outlet box?

• 6
• 5
• 7
• 2

NEC Reference: NEC 12.5

Question 3: The vertically  run metal wire-ways shall be surely supported at intervals not exceeding ............. ft of wire way and shall not have more than one joint between supports.

• 15
• 10
• 5
• 8

NEC Reference: NEC 376.30

Question 4: The interior of any dip tank can be considered as ................... location

• Class1, Division1
• Class1 Division 2
• Class 2 Division 1
• Class2 Division 2

NEC Reference: NEC 516.3

Question 5: A continuous load is load where the maximum current is expected to continue for ............ hours or more.

• 1
• 2
• 3
• 24

Question 6: If the replacement compressor motor draws 35 amperes current, what is the minimum rating for disconnecting means used to protect the motor?

• 40.25 amperes
• 42 amperes
• 38.5 amperes
• 43.75 amperes

NEC Reference: NEC 440.12(A)(1)

Question 7: If the diameter of the branch conductor is doubled, the resistance of conductor .......

• increases
• halve
• be unchanged
• decreases

Question 8: Over head conductors for festoon lighting shall not be smaller than .............. .

• 8 AWG
• 6 AWG
• 12 AWG
• 10 AWG

NEC Reference: NEC 225.6(A)(2)

Question 9: What is the corrected ampacity of a 2/0 THWN conductors in a dry location. If the ambient temperature of location is 40⁰C?

• 170 Amperes
• 195 Amperes
• 180 Amperes
• 160 Amperes

NEC Reference: NEC 310.15(B)(16)

Question 10: What is the minimum size THWN branch circuit conductor required for a 20 HP, 480-volt, 3 Phase Induction type squirrel cage motor with nameplate FLI of 26.5 amps?

• 10 AWG
• 8 AWG
• 12 AWG
• 6 AWG

NEC Reference: NEC 26.5

Question 11: What is the total voltage drop in a 12 AWG conductor that supply a 18 ampere load which is located 50 feet from the power source? The resistance of conductor is 2 ohm/1000 feet.

• 1.8 volts
• 3.6 volts
• 18 volts
• 36 volts

Question 12: A transformer having 1600 turns in primary winding and 400 turns in secondary winding is supplied with 120 volts AC. What is its secondary voltage.

• 40 volts
• 30 volts
• 480 volts
• 120 volts

Question 13: The ungrounded ducts or conduits should be sealed before entering buildings.

• True
• False

NEC Reference: NEC 230.8

Question 14: What is the minimum percentage rated voltage that a storage battery should supply the emergency load?

• 80℅
• 85%
• 82 1/5 %
• 87 1/2 %

Question 15: An 120 voltage source is supplying a lamp with a resistance of 172 ohms. what is the current flow in the circuit?

• 0.7 amperes
• 1.2 amperes
• 0.5 amperes
• 0.9 amperes

Question 16: What is the maximum constant wattage per linear meter allowed for heating cables embedded in concrete?

• 54
• 16 1/2
• 36
• 22 1/2

NEC Reference: NEC 424.4(A)

Question 17: Which of the following wiring methods that can be used for underfloor wiring in computer room in a building?

• Rigid conduit
• electrical metallic tubing
• electrical non metallic tubing
• All the options are correct

Question 18: What is the maximum standard over current device rating used to protect instrument circuits located in a panel board?

• 15 amperes
• 30 amperes
• 200 amperes
• 150 amperes

NEC Reference: NEC 408.52

Question 19: A 8 AWG conductor is suitable to use at maximum ............ KW supplied with a 120 volts power source?

• 6000
• 300
• 6
• 30

NEC Reference: NEC 310.15(B)(16)

Question 20: Which of the following each unit must always required a 20 ampere laundry circuit?

• industrial wash room
• Dwelling unit
• Commercial utility room
• Motel unit

NEC Reference: NEC 210.52(F)