Aeromedical factorsQuestion 720 of 934

At what cabin pressure altitude must every occupant of the aircraft have supplemental oxygen?

  1. Above 10,000 feet
  2. Above 15,000 feet
  3. Above 12,500 feet
  4. Above 14,000 feet
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Correct answer: Above 15,000 feet

The CFRs require oxygen for every occupant above 15,000 feet cabin pressure altitude.

Source: Aeronautical Information Manual (FAA, Basic with Change 3, 9 July 2026), AIM 8-1-2 Effects of Altitude, page 642

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Questions last reviewed: 18 October 2026