Multiple choice

The gyroscopic instruments can be powered by

  1. electric sources

  2. pneumatic sources

  3. both (1) and (2)

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Gyroscopic instruments in aircraft require power to maintain their high-speed rotation. Electric systems use vacuum pumps or electric motors, while pneumatic systems use engine-driven vacuum pumps. Modern aircraft typically have both power sources available for redundancy and在不同飞行条件下的灵活性。

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