aerodynamicsFAA-published sample question (ATM, Aug 2021)
While operating a turbojet transport airplane at high altitude, which of the following is most likely to cause a low speed Mach buffet?
A
Reducing the angle of attack after a high speed Mach buffet.
B
The airplane is flown too fast for its weight and altitude.
C
Tthe airplane is flown too slow for its weight and altitude.✓ Correct Answer
Explanation
Low-speed buffet at high altitude occurs when the airplane is flown too slowly for its weight and altitude, so the high angle of attack causes flow separation near the stall. Flying too fast produces high-speed Mach buffet instead.
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