Aircraft systems and instrumentsQuestion 666 of 934

Which circuit does the master switch NOT supply with electrical energy?

  1. The ignition system
  2. The landing lights
  3. The radio equipment
  4. The fuel gauges
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Correct answer: The ignition system

The magneto ignition works with no outside electrical power.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 7: Aircraft Systems — Electrical System, page 190

Practice aircraft systems and instruments

Questions last reviewed: 18 October 2026