PP 08

How is aircraft electrical power for propeller de-ice system transferred from the engine to the propeller hub assembly?. Static discharge wicks. Slip rings and brushes.

How is anti-icing fluid ejected from the slinger ring on a propeller?. By centrifugal force. By centrifugal action.

What fluid is generally used in propeller anti-icing systems?. Isopropyl alcohol. MIL-5606.

How is the pitch changing mechanism of the hydromatic propeller lubricated?. By pitch changing oil. Pitch change oil.

How does the aerodynamic twisting force affect operating propeller blades?. It tends to turn the propeller blades to a higher blade angle. It tends to rotate blades to a higher pitch.

When the centrifugal force acting on the propeller governor counterweights overcomes the tension on the speeder spring, what speed condition is the propeller in?. Overspeed condition. Underspeed condition.

What operational force causes the greatest stress on a propeller?. Centrifugal force. Centrifugal load.

How does a constant speed propeller provide maximum efficiency?. By adjusting blade angle for most conditions encountered in flight. By adjusting blade pitch for best efficiency.

Describe propeller blade angle. The angle between the blade chord and the rotational plane of the propeller. The angle of the blade to rotation plane.

Why is it important that nicks in the leading edge of aluminum alloy propeller blades be removed as soon as possible?. To eliminate the condition where fatigue cracks can start (stress risers). To maintain aerodynamic smoothness.

What is the term for the actual distance a propeller moves forward through the air during one revolution?. Effective pitch. Propeller slip.

Explain what is happening as far as the centrifugal force on the flyweights and the tension on the speeder spring during the onspeed condition of the propeller governor?. Flyweight force exceeds speeder spring force. Centrifugal force on the governor flyweights is equal to the speeder spring force (balanced).

How should propellers exposed to salt spray be cleaned?. Fresh water. Alcohol wipes.

What actuates the pilot valve in the governor of a constant speed propeller?. Governor flyweights. Engine throttle plate.

How should the power output be reduced in relation to the manifold pressure, RPM, throttle and propeller control lever on an engine equipped with a constant speed propeller and operating near maximum RPM (max BMEP)?. Manifold pressure is reduced with the throttle control before the RPM is reduced with the propeller control. Reduce RPM before manifold pressure.

Under which of the following conditions of flight will the blade angle of a constant speed propeller be the greatest?. High speed, high altitude cruising flight. Climb following takeoff.

What will happen to the propeller blade angle and the engine RPM if the tension on the propeller governor speeder spring (underspeed) is increased?. Blade angle will decrease RPM will increase. Blade angle decreases RPM decreases.

What blade angle does the centrifugal twisting force of an operating propeller rotate the propeller blades to?. Decrease blade pitch (blade angle). Reverse pitch.

What blade angle does the aerodynamic twisting force of an operating propeller rotate the propeller blades to?. Increase blade pitch (blade angle). Decrease blade pitch (blade angle).

What is usually used to correct a horizontal unbalance of a wood fixed pitch propeller?. Solder. Weights at the hub.

How is the speed of a hydromatic constant speed propeller changed in flight?. By changing the load tension against the flyweights in the governor. By changing the rotational speed of the pilot valve in the governor.

What is the purpose of the holes drilled in the tips of wood fixed pitch propellers?. To equalize the moisture content within the blades. To decrease drag.

What is required when the front cone bottoms while installing a propeller?. The rear cone should be moved forward. Additional washers must be installed.

How can an out of track condition be corrected for a wood fixed pitch propeller that has been properly installed that exceeds the out of track tolerance?. By placing shims between the inner flange and outer of the propeller. By blade bending.

What area of aluminum propeller blades are repairs not permitted?. The blade shank. The blade tip.