Q1. What is the priority indicator for distress messages in AFTN?
Correct answer is B – SS
Q2. Which part of the international aeronautical telecommunication service handles aircraft-to-ground message exchange?
Correct answer is B – Aeronautical mobile service (MS)
Q3. How many categories of messages are there in the Aeronautical Fixed Telecommunication Network (AFTN)?
Correct answer is C – 8
Q4. The correct priority indicator for meteorological messages is:
Correct answer is A – GG
Q5. A NOTAM message in AFTN belongs to which message category?
Correct answer is B – Aeronautical Information Services (AIS) messages
Q6. What word is used in radiotelephony to indicate a distress call?
Correct answer is B – MAY DAY – THREE TIMES
Q7. MAY DAY MAY DAY MAY Comes under
Correct answer is A – Distress
Q8. How long may test signals be transmitted during adjustment in the aeronautical mobile service?
Correct answer is A – 10 seconds
Q9. The responsibility for establishing communication rests with:
Correct answer is B – The station having traffic to transmit
Q10. In radiotelephony, the signal for urgency message is:
Correct answer is B – PAN-PAN
Q11. Messages concerning immediate concern to aircraft in flight are:
Correct answer is A – Flight safety messages
Q12. Administration of communication between civil aviation authorities relates to:
Correct answer is A – Aeronautical administrative messages
Q13. What is the correct priority indicator for aeronautical administrative messages?
Correct answer is C – KK
Q14. Which of the following are not included in the aeronautical fixed service?
Correct answer is C – VOR station signals
Q15. In radiotelephony, who decides the order when called by several aircraft?
Correct answer is B – The ground station
Q16. Which message is sent when there is grave and imminent danger requiring immediate assistance?
Correct answer is B – Distress message
Q17. After making a call, how long should you wait before repeating?
Correct answer is C – 10 seconds
Q18. The use of CPDLC requires a response:
Correct answer is B – In the same manner, via CPDLC
Q19. Which message category has priority indicator “FF”?
Correct answer is A – Flight safety messages
Q20. Messages originated by aircraft operating agencies reporting an aircraft arrival or departure?
Correct answer is C – Flight regularity messages
Q21. In aircraft, VHF radios operate in which frequency range?
Correct answer is B – 118–136.990 MHz
Q22. HF communication is mainly used for:
Correct answer is B – Long-range communication
Q23. Which modulation method is typically used in aeronautical VHF voice communication?
Correct answer is B – AM
Q24. The SELCAL system is designed to:
Correct answer is B – Alert crew to incoming calls without continuous monitoring
Q25. The ionospheric “skip” in HF communication is affected by:
Correct answer is A – Time of day, frequency, and aircraft altitude
Q26. Which component in an HF system matches the antenna to the transmitter?
Correct answer is B – HF antenna coupler
Q27. The frequency spacing of 8.33 kHz in VHF aviation radios is available in which range?
Correct answer is A – 118.000–121.400 MHz
Q28. Which of the following is NOT a component of a basic VHF communication system?
Correct answer is C – HF antenna coupler
Q29. A modulated carrier wave is generated by:
Correct answer is B – The transmitter
Q30. SATCOM has reduced dependence on:
Correct answer is B – HF
