FCC Technician Class Exam Study Guide - 2014-2018/Subelement T5 Group A

Electrical principles, units, and terms: current and voltage; conductors and insulators; alternating and direct current

The Question Pool

Question 1

Electrical current is measured in which of the following units?

A. Volts

B. Watts

C. Ohms

D. Amperes

The correct answer is D.

Question 2

Electrical power is measured in which of the following units?

A. Volts

B. Watts

C. Ohms

D. Amperes

The correct answer is B.

Question 3

What is the name for the flow of electrons in an electric circuit?

A. Voltage

B. Resistance

C. Capacitance

D. Current

The correct answer is D.

Question 4

What is the name for a current that flows only in one direction?

A. Alternating current

B. Direct current

C. Normal current

D. Smooth current

The correct answer is B.

Question 5

What is the electrical term for the electromotive force (EMF) that causes electron flow?

A. Voltage

B. Ampere-hours

C. Capacitance

D. Inductance

The correct answer is A.

Question 6

How much voltage does a mobile transceiver usually require?

A. About 12 volts

B. About 30 volts

C. About 120 volts

D. About 240 volts

The correct answer is A.

Question 7

Which of the following is a good electrical conductor?

A. Glass

B. Wood

C. Copper

D. Rubber

The correct answer is C.

Question 8

Which of the following is a good electrical insulator?

A. Copper

B. Glass

C. Aluminum

D. Mercury

The correct answer is B.

Question 9

What is the name for a current that reverses direction on a regular basis?

A. Alternating current

B. Direct current

C. Circular current

D. Vertical current

The correct answer is A.

Question 10

Which term describes the rate at which electrical energy is used?

A. Resistance

B. Current

C. Power

D. Voltage

The correct answer is C.

Question 11

What is the basic unit of electromotive force?

A. The volt

B. The watt

C. The ampere

D. The ohm

The correct answer is A.

Question 12

What term describes the number of times per second that an alternating current reverses direction?

A. Pulse rate

B. Speed

C. Wavelength

D. Frequency

The correct answer is D.