Journeyman Electrician Practice Test 40

Question 1: A residence has six 2-wire branch circuits what is the minimum size service is required for this residence?

• 100 ampere for a 3 wire service
• 140 ampere for a 2 wire service
• 50 ampere for a 3 wire service
• 80 ampere for a 2 wire service

NEC Reference: NEC 230.79

Question 2: What is the demand factor in percentage for a non-dwelling unit with a receptacle load of 15 kVA?

• 50%
• 70%
• 60%
• 40%

NEC Reference: NEC 220.44

Question 3: What is permissible voltage drop in percentage for feeders at the farthest outlet of power heating and lighting loads?

• 3 %
• 2 %
• 5 %
• 8 %

NEC Reference: NEC 215.2(A)(4)

Question 4: What is the minimum percentage rated voltage that a storage battery should supply the emergency load?

• 80 %
• 85 %
• 82 1/2 %
• 87 1/2 %

Question 5: What is the maximum operating voltage of a low voltage lighting system?

• 30 volts
• 25 volts
• 40 volts
• 35 volts

NEC Reference: NEC 411.2

Question 6: How many number of branch circuits required for a 1600 square foot house?

• Two 20-amperes branch circuits
• one 30-ampere branch circuits
• two 15 ampere branch circuits
• three 20 ampere branch circuits

Question 7: Receptacles installed on 20 ampere branch circuit shall be grounding type.

• True
• False

Question 8: Type ITC cables cannot be used in the circuits operating more than ………….. amperes at 150 volts?

• 10 amperes
• 5 amperes
• 15 amperes
• 20 amperes

Question 9: What is the minimum clearance of service drops of 600 volts over residential property?

• 10 feet
• 15 feet
• 8 feet
• 12 feet

NEC Reference: NEC 230.24(B)(3)

Question 10: What is the operating cost of 1 watt electric clock for two years at 2 cents per kwh?

• 30 cents
• 70 cents
• 35 cents
• 55 cents