NEC Code Test

Question 1

A cord-and-plug-attached appliance is linked to a 25 ampere branch circuit. 
What is the maximum ampere rating that the appliance can handle?

Accepted Answer

20 amperes

Answer

22.5 amperes

Answer

18.5 amperes

Answer

25 amperes

Question 2

On a 15 amp branch circuit operating at 120 volts, what is the maximum
 number of receptacles that can be installed?

Accepted Answer

10

Answer

11

Answer

12

Answer

13

Question 3

The branch conductor's ampacity, which supplies power to the motor
 with an FLC of 25 amperes, is

Accepted Answer

32 amperes

Answer

28 amperes

Answer

30 amperes

Answer

25 amperes

Question 4

A 2/0 THWN conductor is placed in a dry area at a temperature of 
450 degrees Celsius. What is the conductor's corrected ampacity?

Accepted Answer

170 Amperes

Answer

165 Amperes

Answer

175 Amperes

Answer

160 Amperes

Question 5

A 1/0 THWN in a wet location has a rated ampacity of 150 amperes. If the
 same conductor is used at a temperature of 400 degrees Celsius. What is the
corrected ampacity?

Accepted Answer

132 amperes

Answer

142 amperes

Answer

138 amperes

Answer

150 amperes

Question 6

The entry points of underground ducts or conduits into the building must be sealed.

Accepted Answer

True

Answer

False

Question 7

If the raceway contains four 1/0 THWN conductors, what is the ampacity of a 1/0 THWN 
conductor in a dry location at a temperature of 1040 F?

Accepted Answer

124

Answer

132

Answer

165

Answer

170

Question 8

What conductor size is needed for a single-family housing unit with an estimated
 load of 220 amps and a maximum unbalanced neutral load of 110 amps?

Accepted Answer

3/0 AWG and 3 AWG

Answer

3/0 AWG and 2 AWG

Answer

2/0 AWG and 2 AWG

Answer

1/0 AWG and 4 AWG

Question 9

Which of the following is the minimum size of a single supply-side bonding jumper for three metal raceways with 
300 kcmil service conductors each?

Accepted Answer

2 AWG

Answer

1 AWG

Answer

3 AWG

Answer

1/0 AWG

Question 10

The connected load of a single family dwelling unit is 4000 VA. The calculated 
demand load is which of the following?

Accepted Answer

3350 VA

Answer

4000 VA

Answer

3550 VA

Answer

3850 VA

A cord-and-plug-attached appliance is linked to a 25 ampere branch circuit. What is the maximum ampere rating that the appliance can handle?

A cord-and-plug-attached appliance is linked to a 25 ampere branch circuit.
What is the maximum ampere rating that the appliance can handle?