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
[edit | edit source]Question 1
[edit | edit source]- 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
[edit | edit source]- 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
[edit | edit source]- 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
[edit | edit source]- 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
[edit | edit source]- 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
[edit | edit source]- 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
[edit | edit source]- 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
[edit | edit source]- 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
[edit | edit source]- 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
[edit | edit source]- 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
[edit | edit source]- 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.