Ground Adjustable Propeller Hub Construction Quiz

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What is the primary function of the spinner bulkhead in a propeller system?

To hold the spinner in place (correct)

To rotate the propeller blade to high pitch position

To increase the flow of cooling air to the engine nacelle

To change the blade angle during flight

What is the purpose of the cuff in a propeller system?

To actuate hydraulically using engine oil

To rotate the propeller blade

To increase the flow of cooling air to the engine nacelle (correct)

To streamline the engine installation

In a constant speed propeller, what mechanism is used to change the blade angle?

Pitch change mechanism

Counterweight force

Centrifugal flyweight mechanism (correct)

Feather spring

What component is responsible for moving a propeller to fine pitch using engine oil?

Pitch change mechanism Signup and view all the answers

What determines the strength and stiffness of propeller blades?

Material, diameter, and orientation Signup and view all the answers

In a counterweight propeller, what causes the propeller to move to a higher pitch?

Centrifugal force acting on counterweight Signup and view all the answers

What is the direction of rotation for a right-handed propeller when viewed from aft - looking forward?

Clockwise Signup and view all the answers

How does increasing the blade angle affect the pitch of a propeller?

The pitch becomes coarser Signup and view all the answers

What kind of propellers are driven by the same engine on the same shaft but rotate in different directions?

Contra-Rotating Propellers Signup and view all the answers

What is propeller torque a measure of?

Resistance offered by the propeller to rotation Signup and view all the answers

What is effective pitch in relation to a propeller?

The actual distance a propeller moves in one revolution Signup and view all the answers

How is propeller efficiency defined?

Ratio of useful work done by the propeller to work done by the engine Signup and view all the answers

What controls the propeller pitch directly when the pilot selects the propeller to Beta range?

Power lever Signup and view all the answers

What happens to the propeller blade angle when the power lever is advanced while the propeller is set to Beta range?

Increase Signup and view all the answers

What will cause the propeller to overspeed according to the text?

Propeller governor flyweights overcoming the speeder spring Signup and view all the answers

What is used to make the propeller move towards fine pitch in the text?

Counterweight at the blade root Signup and view all the answers

How is a constant speed propeller set for take-off according to the text?

Low pitch (fine) and high RPM position Signup and view all the answers

What provides maximum efficiency by adjusting blade angle for most conditions during flight?

Constant Speed Propeller Signup and view all the answers

What is the purpose of the propeller over speed governor?

To serve as a backup for the propeller governor Signup and view all the answers

How does a constant speed propeller system work?

By allowing the pilot to select propeller and engine speed Signup and view all the answers

What happens when a force is applied to the speeder spring?

The blade angle becomes coarser Signup and view all the answers

How does a propeller synchrophasing system reduce vibration and noise?

By adjusting the phase angle between propellers Signup and view all the answers

What varies directly with engine speed in a constant speed propeller system?

The rotational speed of the flyweight assembly Signup and view all the answers

Why is the propeller over speed governor mounted on the reduction gear box?

To act as backup for the propeller governor Signup and view all the answers

How is the propeller anti-icing fluid delivered to the individual blades?

By pumping it to a slinger ring Signup and view all the answers

How is propeller blade balance achieved when a 2-blade prop is placed on a knife edge?

By adjusting the blade track with shims on the propeller shaft hub Signup and view all the answers

What is the suitable inspection method for cracks in an aluminum alloy propeller?

Dye penetrant inspection Signup and view all the answers

How is propeller de-icing achieved using electrical boots?

Heating in timed sequence with inboard and outboard boots Signup and view all the answers

If a wooden propeller blade tip or trailing edge is slightly damaged, how should it be repaired?

By sanding to a new profile Signup and view all the answers

What is the maximum pressure developed by the pump for delivering anti-icing fluid to the blades?

10 psi Signup and view all the answers