Mississippi (Ms) Communication Systems Exam Questions And All Answers Correct (Multiple Choice) Newest

1. What is the primary purpose of a communication system?
• A) To generate power
• B) To transmit and receive information
• C) To store data
• D) To amplify signals only Answer: B
2. Which frequency range is classified as VHF?
• A) 3-30 MHz
• B) 30-300 MHz
• C) 300-3000 MHz
• D) 3-30 kHz Answer: B
3. What does UHF stand for?
• A) Ultra High Frequency
• B) Under High Frequency
• C) Universal High Frequency
• D) Upper High Frequency Answer: A
4. What is the typical range of a VHF radio in flat terrain?
• A) 1-5 miles
• B) 5-15 miles
• C) 15-30 miles
• D) 30-50 miles Answer: C
5. What is modulation in radio communication?

, • A) Changing the power supply
• B) Varying a carrier wave to encode information
• C) Filtering noise
• D) Amplifying the signal Answer: B
6. Which type of modulation varies the amplitude of the carrier wave?
• A) FM
• B) PM
• C) AM
• D) DM Answer: C
7. What does FM stand for?
• A) Fast Modulation
• B) Frequency Modulation
• C) Fixed Modulation
• D) Forward Modulation Answer: B
8. What is the main advantage of FM over AM?
• A) Longer range
• B) Better resistance to noise and interference
• C) Lower cost
• D) Simpler equipment Answer: B
9. What is a repeater in radio communication?
• A) A device that stores messages
• B) A device that receives and retransmits signals
• C) A device that only receives signals
• D) A backup radio unit Answer: B
10. What is the purpose of a squelch control on a radio?
• A) To increase volume
• B) To mute the speaker when no signal is present

, • C) To change frequencies
• D) To boost transmission power Answer: B
11. What is simplex communication?
• A) One-way communication only
• B) Two-way communication on the same frequency
• C) Two-way communication on different frequencies
• D) Three-way communication Answer: B
12. What is duplex communication?
• A) One-way communication
• B) Two-way simultaneous communication on different frequencies
• C) Communication using two radios
• D) Emergency communication only Answer: B
13. What is the function of an antenna?
• A) To power the radio
• B) To convert electrical signals to radio waves and vice versa
• C) To amplify the audio
• D) To store signals Answer: B
14. What does dB stand for?
• A) Direct Band
• B) Decibel
• C) Digital Band
• D) Double Bandwidth Answer: B
15. What is a carrier wave?
• A) A wave that carries the radio unit
• B) A high-frequency wave that is modulated to carry information
• C) A low-frequency audio signal
• D) An emergency signal Answer: B

, 16. What is bandwidth in communication systems?
• A) The width of the antenna
• B) The range of frequencies a system can handle
• C) The distance a signal can travel
• D) The power output of a transmitter Answer: B
17. What is attenuation?
• A) Signal amplification
• B) Signal loss or reduction in strength
• C) Signal modulation
• D) Signal reception Answer: B
18. What causes radio wave propagation?
• A) Gravitational pull
• B) Electromagnetic energy traveling through space
• C) Sound waves
• D) Magnetic fields only Answer: B
19. What is line-of-sight propagation?
• A) Radio waves that follow the Earth's curvature
• B) Radio waves that travel in straight lines
• C) Radio waves that bounce off satellites
• D) Radio waves that travel underground Answer: B
20. What is a common cause of radio interference?
• A) Clear weather
• B) Other electronic devices or radio signals
• C) Low humidity
• D) Calm atmospheric conditions Answer: B
21. What is the purpose of a power supply in a communication system?
• A) To transmit signals