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

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.