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

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.