Module 17: propeller

Which of the following defects is cause of rejection of a wood propeller?

An oversize hub or bolt hole, or el...
Solder missing from screw heads sec...
No protective coating on propeller

Longitudinal (fore and aft) clearance of constant speed propeller blades or...

At the lowest pitch angle
At take-off pitch (maximum thrust) ...
Feathered or in the most critical p...