Numbers to Memorise — Master TablesRadio Telephony — DGCA CPL practice questions

All 9 questions — Numbers to Memorise — Master Tables

Radio Telephony · DGCA CPL. The correct option is marked on each.

1. Q1. The Chicago Convention created ICAO and was signed in:

   • A.1944✓
   • B.1947
   • C.1919

   Why: Signed 7 Dec 1944; in force (ICAO created) 4 Apr 1947.

2. Q2. Annex 10 covers:

   • A.Rules of the Air
   • B.Aeronautical Telecommunications✓
   • C.Aerodromes

   Why: eronautical Telecommunications. Annex 10 — Aeronautical Telecommunications (TEN = TELECOM).

3. Q3. QNE is the standard setting:

   • A.1003.2 hPa
   • B.1013.2 hPa✓
   • C.760 hPa

   Why: 1013.2 hPa (29.92 inHg) → flight levels.

4. Q4. The AIRAC cycle is:

   • A.7 days
   • B.14 days
   • C.28 days✓

   Why: Common effective dates every 28 days.

5. Q5. Broken cloud (BKN) is:

   • A.1–2 oktas
   • B.3–4 oktas
   • C.5–7 oktas✓

   Why: FEW 1–2, SCT 3–4, BKN 5–7, OVC 8.

6. Q6. c = f × λ, where c is:

   • A.3 × 10♠ m/s (approx typo for 10^6)
   • B.3 × 10&sup8; m/s✓
   • C.300 m/s

   Why: Speed of radio waves ≈ 3 × 10&sup8; m/s.

7. Q7. HF long-range voice uses:

   • A.AM, ground wave
   • B.SSB, sky wave✓
   • C.FM, line-of-sight

   Why: HF = SSB, sky wave; VHF = AM, line-of-sight.

8. Q8. The squawk for radio failure is:

   • A.7500
   • B.7600✓
   • C.7700

   Why: 7600 radio failure; 7500 hijack; 7700 emergency.

9. Q9. The distress signal, spoken three times, is:

   • A.PAN-PAN
   • B.MAYDAY✓
   • C.SECURITE

   Why: MAYDAY ×3 = distress; PAN-PAN ×3 = urgency.