EIAT and NEIEP Test FREE NEIEP Electrical Theory Questions and Answers 2

Question 1

What is the standard frequency of AC power in the United States?

Accepted Answer

60 Hz

Answer

The US standard AC power frequency is 60 hertz (Hz), meaning the current alternates direction 60 times per second.

Question 2

What does a transformer do in an electrical system?

Accepted Answer

Changes AC voltage from one level to another

Answer

A transformer uses electromagnetic induction to step up or step down AC voltage levels.

Question 3

Which wire color is used for the neutral conductor in standard US residential wiring?

Accepted Answer

White

Answer

In US residential wiring, the white wire is the neutral conductor, which carries current back to the source.

Question 4

What does a fuse do in an electrical circuit?

Accepted Answer

Interrupts the circuit if current exceeds a safe level

Answer

A fuse contains a metal element that melts when excess current flows, breaking the circuit to prevent damage or fire.

Question 5

What is the difference between AC and DC current?

Accepted Answer

AC periodically reverses direction; DC flows in one direction only

Answer

Alternating current (AC) reverses its flow direction periodically, while direct current (DC) flows continuously in one direction.

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