COLORADO RADIO COMMUNICATION TECHNICIAN
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNOAD PDF
1. Which frequency range is commonly used for VHF
communications?
A. 3–30 kHz
B. 30–300 MHz
C. 300–3000 MHz
D. 3–30 GHz
Rationale: VHF (Very High Frequency) is defined as 30–300
MHz and is widely used in radio communication.
Correct Answer: B
2. What is the primary function of a repeater in radio
communication?
A. Encrypt signals
B. Amplify audio only
C. Extend communication range
D. Convert analog to digital
Rationale: Repeaters receive and retransmit signals to increase
coverage distance.
Correct Answer: C
,3. What does modulation refer to in radio systems?
A. Filtering noise
B. Varying a carrier signal to transmit information
C. Increasing antenna height
D. Reducing power usage
Rationale: Modulation encodes information onto a carrier
wave.
Correct Answer: B
4. Which modulation type varies the frequency of the carrier
wave?
A. AM
B. FM
C. PM
D. QAM
Rationale: Frequency Modulation (FM) changes the frequency
based on input signal.
Correct Answer: B
5. What is the main purpose of an antenna?
A. Store energy
B. Convert electrical signals into electromagnetic waves
C. Increase voltage
,D. Filter frequencies
Rationale: Antennas transmit and receive radio waves.
Correct Answer: B
6. What unit is used to measure frequency?
A. Ohm
B. Watt
C. Hertz
D. Volt
Rationale: Frequency is measured in Hertz (Hz).
Correct Answer: C
7. Which component is used to reduce signal noise?
A. Oscillator
B. Filter
C. Modulator
D. Amplifier
Rationale: Filters remove unwanted frequency components.
Correct Answer: B
8. What is the speed of radio waves in a vacuum?
A. 3 × 10⁶ m/s
B. 3 × 10⁸ m/s
C. 3 × 10⁵ m/s
, D. 3 × 10⁷ m/s
Rationale: Radio waves travel at the speed of light in vacuum.
Correct Answer: B
9. What does bandwidth refer to?
A. Antenna size
B. Range of frequencies transmitted
C. Power output
D. Signal strength
Rationale: Bandwidth is the range of frequencies a system uses.
Correct Answer: B
10. Which device converts RF signals into audio signals?
A. Modulator
B. Demodulator
C. Transmitter
D. Oscillator
Rationale: Demodulators extract audio from RF signals.
Correct Answer: B
11. What is impedance measured in?
A. Watts
B. Ohms
C. Hertz
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
|INSTANT DOWNOAD PDF
1. Which frequency range is commonly used for VHF
communications?
A. 3–30 kHz
B. 30–300 MHz
C. 300–3000 MHz
D. 3–30 GHz
Rationale: VHF (Very High Frequency) is defined as 30–300
MHz and is widely used in radio communication.
Correct Answer: B
2. What is the primary function of a repeater in radio
communication?
A. Encrypt signals
B. Amplify audio only
C. Extend communication range
D. Convert analog to digital
Rationale: Repeaters receive and retransmit signals to increase
coverage distance.
Correct Answer: C
,3. What does modulation refer to in radio systems?
A. Filtering noise
B. Varying a carrier signal to transmit information
C. Increasing antenna height
D. Reducing power usage
Rationale: Modulation encodes information onto a carrier
wave.
Correct Answer: B
4. Which modulation type varies the frequency of the carrier
wave?
A. AM
B. FM
C. PM
D. QAM
Rationale: Frequency Modulation (FM) changes the frequency
based on input signal.
Correct Answer: B
5. What is the main purpose of an antenna?
A. Store energy
B. Convert electrical signals into electromagnetic waves
C. Increase voltage
,D. Filter frequencies
Rationale: Antennas transmit and receive radio waves.
Correct Answer: B
6. What unit is used to measure frequency?
A. Ohm
B. Watt
C. Hertz
D. Volt
Rationale: Frequency is measured in Hertz (Hz).
Correct Answer: C
7. Which component is used to reduce signal noise?
A. Oscillator
B. Filter
C. Modulator
D. Amplifier
Rationale: Filters remove unwanted frequency components.
Correct Answer: B
8. What is the speed of radio waves in a vacuum?
A. 3 × 10⁶ m/s
B. 3 × 10⁸ m/s
C. 3 × 10⁵ m/s
, D. 3 × 10⁷ m/s
Rationale: Radio waves travel at the speed of light in vacuum.
Correct Answer: B
9. What does bandwidth refer to?
A. Antenna size
B. Range of frequencies transmitted
C. Power output
D. Signal strength
Rationale: Bandwidth is the range of frequencies a system uses.
Correct Answer: B
10. Which device converts RF signals into audio signals?
A. Modulator
B. Demodulator
C. Transmitter
D. Oscillator
Rationale: Demodulators extract audio from RF signals.
Correct Answer: B
11. What is impedance measured in?
A. Watts
B. Ohms
C. Hertz
