Gyroscopic precession of a propeller causes:

A yawing force when the aircraft pitches, or a pitching force when the aircraft yaws

Correct

Vibration only

No noticeable effect

Only lateral vibration

Explanation

The spinning propeller acts as a gyroscope; a pitch input produces a yaw effect and vice versa, 90° ahead in the direction of rotation.

Test yourself with random questions from Principles of Flight and all other ATPL subjects.