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AerodynamicsQuestion 452 of 934

What are elevator trim tabs and adjustable horizontal stabilizers used for?

  1. To lower the stall speed at high weights
  2. To shorten the takeoff ground roll
  3. To balance moments from fuel and load changes
  4. To correct airspeed indicator errors at altitude
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Correct answer: To balance moments from fuel and load changes

Trimming devices counteract the moments set up by fuel burnoff and by loading or off-loading passengers or cargo.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 5: Aerodynamics of Flight — Moment and Moment Arm, page 111

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Questions last reviewed: 18 October 2026