FCC Technician Class Exam Study Guide - 2014-2018/Subelement T3 Group B

Radio and electromagnetic wave properties: the electromagnetic spectrum; wavelength vs. frequency; velocity of electromagnetic waves; calculating wavelength

The Question Pool

Question 1

What is the name for the distance a radio wave travels during one complete cycle?

A. Wave speed

B. Waveform

C. Wavelength

D. Wave spread

The correct answer is C.

Question 2

What property of a radio wave is used to describe its polarization?

A. The orientation of the electric field

B. The orientation of the magnetic field

C. The ratio of the energy in the magnetic field to the energy in the electric field

D. The ratio of the velocity to the wavelength

The correct answer is A.

Question 3

What are the two components of a radio wave?

A. AC and DC

B. Voltage and current

C. Electric and magnetic fields

D. Ionizing and non-ionizing radiation

The correct answer is C.

Question 4

How fast does a radio wave travel through free space?

A. At the speed of light

B. At the speed of sound

C. Its speed is inversely proportional to its wavelength

D. Its speed increases as the frequency increases

The correct answer is A.

Question 5

How does the wavelength of a radio wave relate to its frequency?

A. The wavelength gets longer as the frequency increases

B. The wavelength gets shorter as the frequency increases

C. There is no relationship between wavelength and frequency

D. The wavelength depends on the bandwidth of the signal

The correct answer is B.

Question 6

What is the formula for converting frequency to approximate wavelength in meters?

A. Wavelength in meters equals frequency in hertz multiplied by 300

B. Wavelength in meters equals frequency in hertz divided by 300

C. Wavelength in meters equals frequency in megahertz divided by 300

D. Wavelength in meters equals 300 divided by frequency in megahertz

The correct answer is D.

Question 7

What property of radio waves is often used to identify the different frequency bands?

A. The approximate wavelength

B. The magnetic intensity of waves

C. The time it takes for waves to travel one mile

D. The voltage standing wave ratio of waves

The correct answer is A.

Question 8

What are the frequency limits of the VHF spectrum?

A. 30 to 300 kHz

B. 30 to 300 MHz

C. 300 to 3000 kHz

D. 300 to 3000 MHz

The correct answer is B.

Question 9

What are the frequency limits of the UHF spectrum?

A. 30 to 300 kHz

B. 30 to 300 MHz

C. 300 to 3000 kHz

D. 300 to 3000 MHz

The correct answer is D.

Question 10

What frequency range is referred to as HF?

A. 300 to 3000 MHz

B. 30 to 300 MHz

C. 3 to 30 MHz

D. 300 to 3000 kHz

The correct answer is C.

Question 11

What is the approximate velocity of a radio wave as it travels through free space?

A. 3000 kilometers per second

B. 300,000,000 meters per second

C. 300,000 miles per hour

D. 186,000 miles per hour

The correct answer is B.