aircraft systemsFAA-published sample question (PAR, Aug 2021)
What is one purpose of wing flaps?
A
To enable the pilot to make steeper approaches to a landing without increasing the airspeed.✓ Correct Answer
B
To relieve the pilot of maintaining continuous pressure on the controls.
C
To decrease wing area to vary the lift.
Explanation
Flaps are secondary flight controls that increase both lift and drag, so the airplane can fly a steeper descent angle toward the runway without picking up speed (PHAK Ch. 6; AFH Ch. 9). Relieving the pilot of continuous control pressure is the job of trim tabs, not flaps. Flaps also do not decrease wing area; extending them increases camber (and on some designs wing area) to change lift.
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