A&P Propeller Systems and Maintenance

Question 1

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

Accepted Answer

To maintain a constant engine RPM by varying blade pitch angle

Answer

To maintain constant blade pitch regardless of throttle position

Answer

To automatically feather the propeller during engine failure

Answer

To prevent propeller overspeed by mechanically limiting blade travel

Question 2

Which blade pitch setting is used during takeoff on a constant-speed propeller to achieve maximum thrust?

Accepted Answer

Low pitch (fine) angle to allow the engine to develop maximum RPM

Answer

High pitch (coarse) angle to maximize propeller efficiency

Answer

Feathered position to prevent torque effects during acceleration

Answer

Beta range to provide maximum blade bite at low airspeed

Question 3

What does the term 'blade track' mean when applied to propeller inspection?

Accepted Answer

The ability of all blades to follow the same plane of rotation

Answer

The arc swept by each blade tip during one full rotation

Answer

The angle each blade makes relative to the propeller hub center

Answer

The spiral path of air accelerated behind the propeller disc

Question 4

What is the primary reason for feathering a propeller after an engine becomes inoperative in flight?

Accepted Answer

To minimize aerodynamic drag and prevent windmilling of the failed engine

Answer

To increase drag and reduce aircraft speed for an emergency approach

Answer

To cool the inoperative engine during the subsequent descent

Answer

To lock the crankshaft and prevent further internal engine damage

Question 5

What does 'effective pitch' mean in propeller terminology?

Accepted Answer

The actual distance the aircraft advances through the air per propeller revolution

Answer

The blade angle measured at the manufacturer-specified reference station

Answer

The theoretical advance per revolution assuming no propeller slippage

Answer

The maximum pitch angle the variable-pitch propeller can achieve

Question 6

At which station along the blade is propeller blade angle typically measured per FAA standards?

Accepted Answer

75% of the blade radius from the hub center

Answer

12 inches from the blade tip measured along the leading edge

Answer

42 inches from the propeller centerline measured radially

Answer

50% of the blade radius from the hub center

Question 7

What does 'propeller slip' represent in terms of propeller performance?

Accepted Answer

The difference between geometric pitch and effective pitch

Answer

Physical slippage of the propeller hub on the engine crankshaft splines

Answer

Blade flutter caused by aerodynamic imbalance at high RPM

Answer

A reduction in blade pitch angle that occurs under high power settings