Test yourself: 5 hard theory questions, free Airspace, weather, regs and aerodynamics, FAA-style — instant score, every answer explained. No signup.
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Skin friction drag is reduced by:
A
Increasing surface roughness
B
Maintaining smooth, clean surfaces and keeping boundary layer laminar as long as possible
C
Increasing angle of attack
D
Flying at lower altitudes
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See where you stand: 5 hard questions, instant score, every answer explained.