AMT Aircraft Propeller Systems 2

Question 1

What is the primary purpose of a propeller governor in a constant-speed propeller system?

Accepted Answer

Maintain a selected RPM by varying blade pitch

Answer

The governor senses propeller RPM and adjusts oil pressure to the pitch change mechanism to vary blade angle, maintaining the pilot-selected RPM.

Question 2

When inspecting a wood propeller, small cracks running parallel to the grain are typically treated by:

Accepted Answer

Rejecting the propeller from service

Answer

Cracks parallel to the grain in a wood propeller are cause for rejection because they can rapidly propagate and lead to structural failure.

Question 3

A turboprop engine's propeller is in the FEATHER position when blade angle is approximately:

Accepted Answer

80° to 90° (parallel to airflow)

Answer

Feather positions blades nearly parallel to the airflow (≈85–90°) to minimize drag in the event of an engine failure.

Question 4

Which condition is indicated when a constant-speed propeller surges (hunts) repeatedly between high and low RPM?

Accepted Answer

Air or contaminants in the propeller governor oil system

Answer

Air or contamination in the governor oil system causes erratic oil pressure delivery, producing the characteristic hunting or surging of RPM.

Question 5

On a single-engine aircraft with a right-hand rotating propeller, P-factor is most pronounced during:

Accepted Answer

Low airspeed, high angle of attack flight

Answer

P-factor is greatest at low airspeed and high angle of attack because the descending blade has a much higher angle of attack than the ascending blade.

(AMT) Aviation Maintenance Technician Practice Test

(AMT) Aviation Maintenance Technician Practice Test

AMT Aircraft Propeller Systems 2