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

Control fuel flow to maintain RPM

Answer

Limit maximum propeller diameter

Answer

Regulate oil temperature to the pitch change mechanism

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

Applying epoxy filler and refinishing

Answer

Filling with wood putty and varnishing

Answer

Monitoring until cracks exceed 1 inch

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

0° to 5° (flat pitch)

Answer

15° to 20° (cruise pitch)

Answer

–5° (reverse pitch)

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

Incorrect torque on the propeller retaining nut

Answer

Governor speeder spring set too high

Answer

Excessive blade track error

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

High-speed level flight

Answer

Descent at idle power

Answer

Ground roll at takeoff speed

Question 6

The blade angle of a propeller is measured from the plane of rotation to the:

Accepted Answer

Chord line of the blade

Answer

Leading edge of the blade

Answer

Trailing edge of the blade

Answer

Thrust face of the blade

Question 7

What is the purpose of the centrifugal twisting moment acting on propeller blades?

Accepted Answer

It tends to move blades toward low pitch (flat pitch)

Answer

It tends to move blades toward high pitch (coarse pitch)

Answer

It counters the gyroscopic effect during turns

Answer

It is used to drive the pitch change mechanism