flight instrumentsFAA-published sample question (PAR, Aug 2021)
What does the red line on an airspeed indicator represent?
A
Maneuvering speed.
B
Turbulent or rough-air speed.
C
Never-exceed speed.✓ Correct Answer
Explanation
The red radial line on an airspeed indicator marks VNE, the never-exceed speed; operating above it can cause structural damage or failure (PHAK Ch. 8). Maneuvering speed (VA) is not marked on the airspeed indicator, and the caution range for smooth air only is the yellow arc, whose lower end is VNO, the maximum structural cruising speed.
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