Performance and weight and balanceQuestion 868 of 934

What is a moment index used for?

  1. It replaces the datum in the computations
  2. It shows the greatest moment that the airplane can carry at its maximum gross weight
  3. It keeps the numbers small when heavy items and long arms give large moments
  4. It converts station numbers to inches
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Correct answer: It keeps the numbers small when heavy items and long arms give large moments

A moment index is a moment divided by a constant such as 100, 1,000, or 10,000.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 10: Weight and Balance — Terms and Definitions, page 249

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Questions last reviewed: 18 October 2026