Flight Warning SystemsNavigation — Instrumentation — DGCA CPL practice questions

All 6 questions — Flight Warning Systems

Navigation — Instrumentation · DGCA CPL. The correct option is marked on each.

1. Q1. The aural warning priority order from highest to lowest is:

   • A.GPWS → Windshear → Stall → ACAS
   • B.ACAS → GPWS → Windshear → Stall
   • C.Stall → Windshear → GPWS → ACAS✓
   • D.Windshear → Stall → ACAS → GPWS

   Why: The standard synthetic voice aural warning priority is: Stall → Windshear → GPWS → ACAS . Stall is inhibited during stick push, windshear takes first active priority, then terrain, then collision. See Section 4 . — Mnemonic: "Stall Wins, Goes Ahead" = Stall, Windshear, GPWS, ACAS.

2. Q2. On a Boeing aircraft, an autopilot disconnect is accompanied by:

   • A.A bell
   • B.A siren
   • C.A wailer✓
   • D.Continuous repetitive chimes

   Why: Boeing: wailer = autopilot disconnect. Bell = fire; Siren = cabin altitude, config, overspeed. Continuous repetitive chimes = Airbus red warning. See Section 4 . — On Airbus, AP disconnect = cavalry charge. Important to distinguish Boeing vs Airbus aural warnings.

3. Q3. A Level B alert from the flight warning system requires:

   • A.Immediate crew action
   • B.Immediate crew alertness and subsequent crew action✓
   • C.Crew alertness only
   • D.Automatic system shutdown

   Why: Level A = Warning = immediate action. Level B = Caution = immediate alertness + subsequent action. Level C = Advisory = alertness only. See Section 2 . — Think of it as urgency levels: Level A = drop everything now; Level B = look up and plan action; Level C = note and monitor.

4. Q4. Advisories (Level C alerts) are displayed in which colour?

   • A.Red
   • B.Green
   • C.Amber or yellow only
   • D.Any colour except red or green✓

   Why: Advisories can be displayed in any colour except red (reserved for warnings) or green (reserved for normal status). On EICAS panels, advisories are also amber. See Section 3 . — The rule for advisories is defined by exclusion: not red, not green. In practice most advisories are amber too, but the regulation allows other colours.

5. Q5. The stall warning on a fly-by-wire (Airbus) aircraft consists of:

   • A.A bell and red master WARNING light
   • B.Stick shaker and aural warning
   • C.Cricket sound, synthetic voice STALL, and red master WARNING light✓
   • D.Siren and amber master CAUTION light

   Why: On FBW (Airbus) aircraft: stall warning = cricket sound + synthetic voice "STALL" + red master WARNING light. There is no mechanical stick shaker — the FBW system handles control protection directly. See Section 4 . — FBW stall protection goes beyond warning — the flight computer limits the AoA. The cricket + synth voice is the last "advisory" before the computer intervenes. It's a Warning (red), not just a caution.

6. Q6. The Flight Warning System inhibits some warnings in certain flight phases in order to:

   • A.Reduce avionics power consumption
   • B.Allow the crew to focus on the most immediate threat to safety✓
   • C.Comply with noise abatement procedures
   • D.Prevent automatic engagement of the autopilot

   Why: The FWS prioritises warnings and inhibits those not immediately relevant so the crew can respond to the most critical threat. Multiple simultaneous warnings could confuse the crew and cause them to miss the most urgent one. See Section 1 . — This is the core philosophy of an integrated FWS vs individual standalone warning systems. Integration → prioritisation → reduced workload → better safety outcomes.