Communication systems in aerospace MCQs – Aerospace

1. What is the primary purpose of communication systems in aerospace?
(A) Navigation
(B) Weather updates
(C) Data transmission
(D) Ground control communication

2. Which frequency band is most commonly used for satellite communication in aerospace?
(A) VHF
(B) UHF
(C) C-band
(D) L-band

3. What is the typical range of the Very High Frequency (VHF) used in aviation communication?
(A) 108 – 118 MHz
(B) 118 – 137 MHz
(C) 200 – 300 MHz
(D) 137 – 156 MHz

4. Which modulation technique is widely used for voice communication in aircraft?
(A) Frequency Modulation (FM)
(B) Amplitude Modulation (AM)
(C) Phase Modulation (PM)
(D) Pulse Modulation (PM)

5. In aerospace, what does the acronym SATCOM stand for?
(A) Satellite Communication
(B) Secure Aerospace Terminal Communication
(C) Surveillance and Tactical Communication
(D) Systematic Air Traffic Communication

6. What is the primary function of a transponder in an aircraft communication system?
(A) To send signals to other aircraft
(B) To receive signals from satellites
(C) To automatically respond to radar interrogations
(D) To control communication between crew members

7. Which frequency range is used by the Instrument Landing System (ILS) for aircraft landing assistance?
(A) 108 – 112 MHz
(B) 118 – 137 MHz
(C) 1 – 2 GHz
(D) 12 – 14 GHz

8. Which type of antenna is commonly used for satellite communication in aerospace?
(A) Yagi-Uda antenna
(B) Horn antenna
(C) Parabolic dish antenna
(D) Dipole antenna

9. What does the term “Line of Sight” (LOS) mean in aircraft communication?
(A) Communication based on satellite signals
(B) Communication with direct visual contact between transmitter and receiver
(C) Communication dependent on atmospheric conditions
(D) Communication with terrestrial repeaters

10. Which system is responsible for sending real-time flight data to ground stations?
(A) ACARS
(B) ADS-B
(C) TCAS
(D) VOR

11. What is the primary role of the Aircraft Communication Addressing and Reporting System (ACARS)?
(A) In-flight entertainment
(B) Voice communication between the pilot and air traffic control
(C) Digital data transmission between aircraft and ground stations
(D) Flight navigation

12. Which system is used to prevent collisions between aircraft?
(A) ILS
(B) ACARS
(C) TCAS
(D) ADS-B

13. Which technology is responsible for the automatic broadcast of an aircraft’s location and velocity?
(A) ADS-B
(B) ILS
(C) VOR
(D) HF Communication

14. What does TCAS stand for in aviation communication systems?
(A) Traffic Collision Avoidance System
(B) Tactical Communication and Surveillance
(C) Total Communication Air System
(D) Transponder Communication Assistance System

15. What is the typical frequency range used for radar systems in aerospace?
(A) 1 – 2 GHz
(B) 5 – 10 GHz
(C) 20 – 40 GHz
(D) 30 – 300 MHz

16. Which of the following is a long-range communication system used in aerospace?
(A) VHF
(B) UHF
(C) HF
(D) L-band

17. What is the primary purpose of Automatic Dependent Surveillance-Broadcast (ADS-B)?
(A) Enhance cockpit communication
(B) Provide real-time weather data
(C) Broadcast aircraft position and speed
(D) Control ground-to-air traffic

18. Which aviation system aids in automated landings using radio signals?
(A) GPS
(B) ACARS
(C) ILS
(D) HF Communication

19. Which communication band is primarily used for military aviation communication?
(A) VHF
(B) HF
(C) UHF
(D) L-band

20. Which of the following systems helps to provide navigational information to aircraft in flight?
(A) ADS-B
(B) VOR
(C) TCAS
(D) SATCOM