Propeller Fundamentals Quiz

What is the primary purpose of a propeller?

• To generate lift

• To control the aircraft's direction

• To convert engine power into thrust

• To stabilize the aircraft

What is the maximum number of blades typically used on a propeller?

• Two

• Three

• Six

• Five

What is the angle of attack in relation to a propeller?

• The angle between the propeller blade and the ground

• The angle between the chord line of a blade and the relative wind

• The angle between the propeller and the engine

• The angle of the aircraft's nose

What is the term for the distance a propeller section moves forward in one revolution?

• Effective pitch

• Pitch distribution

• Blade angle

• Geometric pitch

What is the primary disadvantage of a ducted fan compared to a conventional propeller?

• Larger diameter

• Higher noise levels

• Less efficient at cruise

• More complex design

What does the term 'solidity' refer to in propeller design?

• The number of blades on the propeller

• The ability to absorb power from the engine

• The surface area of the propeller

• The strength of the material used

What is the effect of windmilling on a variable pitch propeller?

• It increases thrust

• It reduces RPM

• It causes drag and negative torque

• It stabilizes the aircraft

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

• To change the pitch of the blades

• To reduce drag

• To maintain a selected RPM

• To increase engine power

What is the primary purpose of feathering a propeller?

• To improve fuel efficiency

• To reduce drag during windmilling

• To increase thrust

• To stabilize the aircraft

What is the term for the angle between the propeller's plane of rotation and the chord line of the propeller aerofoil?

• Angle of attack

• Pitch angle

• Blade angle

• Effective pitch