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Aircraft systems and instrumentsQuestion 527 of 934

The VSI does not show exactly zero on the ramp before takeoff. What can the pilot do?

  1. Use the indicated value as the zero mark
  2. Not fly the airplane until a mechanic resets it
  3. Adjust the VSI with the altimeter setting knob
  4. Wait until the VSI drifts back to exactly zero
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Correct answer: Use the indicated value as the zero mark

Normally the needle is only slightly above or below the zero line.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 8: Flight Instruments — Vertical Speed Indicator (VSI) — Instrument Check, page 210

Practice aircraft systems and instruments

Questions last reviewed: 18 October 2026