AME Aircraft Propeller Systems and Theory 2

Question 1

What is 'blade angle' in propeller terminology?

Accepted Answer

The angle between the blade chord line and the plane of rotation

Answer

Blade angle (pitch angle) is measured between the blade chord line and the plane of rotation, determining how much air is deflected with each revolution.

Question 2

'Geometric pitch' of a propeller is defined as:

Accepted Answer

The theoretical distance the propeller would advance per revolution with no slippage

Answer

Geometric pitch is the theoretical advance per revolution based on blade angle alone, whereas effective pitch accounts for actual slippage through the air.

Question 3

Which FAA regulation governs the type certification of propellers?

Accepted Answer

14 CFR Part 35

Answer

14 CFR Part 35 establishes the airworthiness standards specifically for propeller type certification in the United States.

Question 4

A propeller exhibiting excessive vibration during ground runup most likely indicates:

Accepted Answer

Dynamic imbalance or damaged blades

Answer

Excessive vibration during runup typically points to propeller dynamic imbalance, a bent blade, or damage that disrupts the even distribution of rotating mass.

Question 5

What is the typical repair method for minor nicks and gouges on aluminum propeller blade leading edges?

Accepted Answer

Filing the nick smooth and blending it into the blade profile

Answer

Minor nicks on aluminum propeller blades are repaired by carefully filing them smooth and blending the edges to prevent stress concentration and fatigue cracking.

AME - Aircraft Maintenance Engineer Practice Test

AME - Aircraft Maintenance Engineer Practice Test

AME Aircraft Propeller Systems and Theory 2