Q1. What is the primary purpose of Q-codes in radio communication?
Correct answer is B – To simplify and standardize messages
Q2. How many letters do Q-codes typically consist of?
Correct answer is B – Three
Q3. Which letter do all Q-codes start with?
Correct answer is B – Q
Q4. What does the Q code “QNH” represent in aviation?
Correct answer is A – Altimeter setting based on sea level pressure
Q5. What information does the Q code “QFE” give to a pilot?
Correct answer is B – Atmospheric pressure at airfield elevation
Q6. The Q code “QTE” is used to indicate what?
Correct answer is B – True bearing or direction
Q7. What does the Q code “QDM” mean?
Q8. When an aircraft’s altimeter is set to QFE at a specific airfield, what will the altimeter read while on the runway?
Correct answer is C – Zero (“0”)
Q9. Which of the following best describes the relationship between QNH, QFE, and QNE?
Correct answer is B – QNH = mean sea level; QFE = local airfield surface; QNE = standard datum 1013.25hPa
Q10. What does the Q code “QDM” signify in aviation communication?
Correct answer is A – Magnetic heading
Q11. If an aircraft transmits “QFE,” what information is being requested or provided?
Correct answer is A – Atmospheric pressure at aerodrome elevation
Q12. What does the Q code “QNH” typically indicate in aviation?
Correct answer is B – Altimeter sub-scale setting to obtain elevation when on ground
Q13. What does the Q code “QTE” represent in aviation communication?
Correct answer is C – True bearing
Q14. What is the meaning of the Q code “QDR” in aviation?
Correct answer is B – Magnetic bearing
Q15. What is the main purpose of the SELCAL system in aviation?
Correct answer is – To selectively alert aircraft by coded tones
Q16. How many tones are used in a single SELCAL code?
Correct answer is – Four
Q17. Duration of SELCAL?
Correct answer is – 2 seconds
Q18. What is the primary benefit of using SELCAL for pilots?
Correct answer is – Reduces pilot fatigue by replacing constant listening
Q19. What happens in the cockpit upon receipt of the correct SELCAL code?
Correct answer is – A light and/or chime is activated
Q20. Which letters are excluded from SELCAL code assignments?
Correct answer is – I, N, O , only uses letters from A to S except I, N, O.
Q21. Where is the SELCAL code typically included by the operator?
Correct answer is – In the flight plan
Q22. Before leaving VHF coverage, what should a pilot do regarding SELCAL?
Correct answer is – Establish temporary communication with HF station to check SELCAL
Q23. What is the correct initial cockpit reply to a SELCAL alert and ground station call?
Correct answer is – Aircraft call sign followed by “go ahead”
Q24. If a pre-flight SELCAL check fails, what should the aircraft do?
Correct answer is – Maintain continuous listening watch
Q25. Which of the following is NOT an advantage of SELCAL?
Correct answer is – Replaces all voice communications
Q26. In the event of duplicate SELCAL codes being assigned, what should ground stations always use to establish communications?
Correct answer is – Correct radiotelephony procedures
Q27. If an aeronautical station receives no reply after two SELCAL calls on each frequency, what should it do next?
Correct answer is – Switch to voice calling
Q28. On what radio channels can SELCAL be used for ground-to-air selective calling?
Correct answer is – Both HF and VHF
Q29. SELCAL codes in an aircraft should be associated with which of the following?
Correct answer is – The radiotelephony call sign or flight number or registration
Q30. If SELCAL equipment is only single-code type and the aircraft uses a flight number as the call sign, what must the airline do?
Correct answer is – Advise ground stations of the correct SELCAL code for each flight
Q31. What type of signal is transmitted with SELCAL?
Correct answer is – Audible tones
Q32. Which party is ultimately responsible for ensuring the ground station knows the correct SELCAL code?
Correct answer is – The aircraft operating agency
Q33. What must be done if a SELCAL system malfunctions during flight?
Correct answer is – Pilot announces the issue and switches to voice calling
Q34. When a SELCAL system has been repaired and is again functional, what should be done?
Correct answer is – All relevant stations should be advised
