Aircraft systems and instrumentsQuestion 509 of 934

A pilot sets the barometric scale on the altimeter. What does this correct for?

  1. Nonstandard temperature
  2. Nonstandard pressure
  3. Instrument lag
  4. Pitot tube blockage
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Correct answer: Nonstandard pressure

The indicated altitude is correct only in the standard atmosphere. Setting the corrected pressure adjusts for nonstandard pressure.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 8: Flight Instruments — Altimeter — Effect of Nonstandard Pressure and Temperature, page 206

Practice aircraft systems and instruments

Questions last reviewed: 18 October 2026