FREE IEC Basic Electrical Standards Questions and Answers

Question 1

In a dwelling, at least how many ampere branch circuit must be provided for bathroom receptacles?

Accepted Answer

20-ampere

Answer

10-ampere

Answer

21-ampere

Answer

100-ampere

Question 2

What type of switch will be used to break two underground circuit conductors such as to a motor?

Accepted Answer

A double-pole switch

Answer

A double-throw switch

Answer

A short-circuit switch

Answer

A single-pole switch

Question 3

After six 12 AWG wires are previously installed in a 4 11/16 x 2 1.8 square box, how many number 10 AWG conductors may be installed?

Accepted Answer

11 number 10 AWG

Answer

50 number 10 AWG

Answer

21 number 10 AWG

Answer

12 number 10 AWG

Question 4

How should two identical 24-volt loads be connected to a single 24-volt battery to ensure they receive the correct voltage?

Accepted Answer

In a parallel connection

Answer

In a series connection

Answer

In a short circuit connection

Answer

In an ungrounded connection

Question 5

What color is an electrical grounding conductor permitted to be?

Accepted Answer

Green

Answer

Ungrounded

Answer

Blue

Answer

Red

Question 6

What is the minimum wire size needed to limit the voltage drop to 5% when running a 300 ft length of type NM-B cable to supply power to a 120 volt, 1/2 HP 8-amp load?

Accepted Answer

10 AWG

Answer

12 AWG

Answer

20 AWG

Answer

100 AWG

Question 7

Under what location classification would a luminaire installed under a covered breezeway need to be marked as suitable for?

Accepted Answer

A damp location

Answer

A wet location

Answer

A dry location

Answer

A green location

Question 8

What type of condition occurs if the hot conductors are inadvertently touched together in a junction box within a circuit installed in EMT between a 2-pole circuit breaker and a load?

Accepted Answer

A short circuit condition

Answer

A parallel condition

Answer

A double pole condition

Answer

An open circuit condition

Question 9

What is the minimum depth requirement for installing underground feeder cable in PVC conduit under a building?

Accepted Answer

At least 0 inches deep

Answer

At least 8 inches deep

Answer

At least 12 inches deep

Answer

At least 24 inches deep

Question 10

What is the maximum amp rating for a circuit breaker that can be installed on a 12 AWG copper circuit conductor connected to multiple receptacles?

Accepted Answer

20-amp

Answer

0-amp

Answer

10-amp

Answer

100-amp