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Aeromedical factorsQuestion 884 of 934

Which situation can create a false horizon?

  1. A sloping cloud formation or a dark scene with ground lights
  2. Flying straight and level in clear air with the horizon in view
  3. A well-lit runway on a clear day
  4. A steady climb in smooth air
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Correct answer: A sloping cloud formation or a dark scene with ground lights

A false horizon can lead the pilot to place the airplane in a dangerous attitude.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 17: Aeromedical Factors — Vestibular Illusions, page 430

Practice aeromedical factors

Questions last reviewed: 18 October 2026