NEC Code Questions Practice Test-13

Question 1: Which of the following following locations , easily ignitable fibers / flyings are stored?

• Class I Division I
• Class III Division I
• Class III Division 2
• Class I Division 2

NEC Reference: NEC 500.5(D)(2)

Question 2: What is the minimum size electrical service is required for a single family dwelling unit?

• 100 amperes
• 50 amperes
• 150 amperes
• 175 amperes

NEC Reference: NEC 230.79(C)

Question 3: What must be the electrical fuse rating to protect 12 AWG Branch conductor?

• 20 amperes
• 35 amperes
• 25 amperes
• 40 amperes

NEC Reference: NEC 240.4(D)

Question 4: A sign outlet of an commercial occupancy accessible to pedestrians is a .......................... load

• continuous
• non continuous

Question 5: What is the minimum feeder/service conductor calculated load for an electrical sign?

• 15000 VA
• 12000 VA
• 18000 VA
• 10000 VA

NEC Reference: NEC 220.14(F)

Question 6: What is the minimum ampere rating of short circuit ground fault protective device that can be used for individual motor-compressor?

• 12 amperes
• 15 amperes
• 20 amperes
• 18 amperes

NEC Reference: NEC 440.22(A)

Question 7: An industrial heating appliances rated at 40 A is supplied by a tap conductor. what should be the minimum tap conductor ampacity?

• 20 amperes
• 10 amperes
• 30 amperes
• 25 amperes

NEC Reference: NEC 210.19(A)(4)

Question 8: If a single dwelling family unit consists of one air conditioning unit rated at 4 KW and fixed heating equipment rated at 3 KW. What is the total dwelling unit calculated load?

• 4 KW
• 7 KW
• 3.5 KW
• 3 KW

NEC Reference: NEC 220.60

Question 9: A 4000 watts electric oven is connected to 480 volts electric circuit. what is the resistance of heating element?

• 57.6 ohms
• 8.33 ohms
• 0.12 ohms
• 38.4 ohms

NEC Reference: NEC 57.6

Question 10: What is the maximum rating of panel boards containing 30 ampere or less snap switches?

• 30 amperes
• 120 amperes
• 45 amperes
• 200 amperes

NEC Reference: NEC 408.36(A)