flight instrumentsFAA-published question bank (Private Pilot, 2008)
If the pitot tube and outside static vents become clogged, which instruments would be affected?
A
The altimeter, airspeed indicator, and turn-and-slip indicator.
B
The altimeter, airspeed indicator, and vertical speed indicator.✓ Correct Answer
C
The altimeter, attitude indicator, and turn-and-slip indicator.
Explanation
The altimeter, airspeed indicator and vertical speed indicator are the pitot-static instruments, so blocking the pitot tube and static vents affects them (the airspeed indicator uses both, the altimeter and VSI use static pressure). The attitude and turn indicators are gyroscopic and are not connected to the pitot-static system.
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