NCCER Ch. 12 Review

Front

What does an ammeter measure?

Back

Current.

Front

What is an uninterrupted electrical path for current flow called?

Back

Circuit.

Front

What is a coil in electrical terms?

Back

A number of turns of wire used for electromagnetic effects or providing electrical resistance.

Front

What does CAT IV rating indicate?

Back

The highest level of protection for electrical instruments.

Front

What is a characteristic of analog meters?

Back

Analog meters rely on a moving-coil meter movement.

Front

What is the primary function of a voltmeter?

Back

To measure voltage.

Front

What is the difference between AC and DC current?

Back

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction.

Front

What is the purpose of a circuit breaker?

Back

To protect an electrical circuit from damage caused by overload or short circuit.

Front

What does the term 'insulation resistance' refer to?

Back

The resistance of the insulating material to the flow of electric current.

Front

What is the function of a transformer?

Back

To change the voltage level in an AC circuit.