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Aeromedical factorsQuestion 881 of 934

How are the three semicircular canals in each inner ear arranged?

  1. In a single flat plane
  2. At approximate right angles to each other
  3. At about 45° to each other in the same plane
  4. In line with the vertical axis only
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Correct answer: At approximate right angles to each other

They are arranged in the roll, pitch, and yaw axes.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 17: Aeromedical Factors — Spatial Disorientation and Illusions, page 428

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Questions last reviewed: 18 October 2026