Test on Aircraft Propeller Systems: Operation and Maintenance
Aircraft Propeller Systems: Operation & Maintenance Guide
Test: Aircraft Propellers
20 questions
Question 1: Is the propeller's blade angle directly adjusted inside the governor to change the operating speed of a constant-speed propeller?
A. Ano
B. Ne
Explanation: To change the speed at which a constant-speed propeller is operating, the compression of the speeder spring is adjusted inside the governor.
Question 2: The piston of a counterweight propeller is exposed to the open air when the blades are in the low pitch position.
A. Ano
B. Ne
Explanation: In the low pitch position, the movable cylinder of a counterweight propeller is outboard, and the propeller piston is exposed to the open air. This is why blades are moved to high pitch before stopping the engine to protect the piston from dirt and moisture.
Question 3: Is an external air source required to unfeather a McCauley propeller?
A. Ano
B. Ne
Explanation: The accumulator on some McCauley feathering propellers stores oil under pressure, and this oil is used to help the propeller blades move toward low pitch when the propeller is being unfeathered. It does not mention an external air source.
Question 4: The beta range of operation for a turboprop propeller is its in-flight mode, covering takeoff to landing.
A. Ano
B. Ne
Explanation: The study materials state that the beta range of operation of a turboprop propeller is the mode of ground operation, including starting, taxiing, and ground reverse operation. The in-flight mode of operation from takeoff to landing is referred to as the alpha range.
Question 5: In the air, do aerodynamic forces contribute to allowing a McCauley feathering propeller to move to the feather position?
A. Ano
B. Ne
Explanation: In the air, aerodynamic forces keep the propeller rotating. This rotation, combined with centrifugal force, holds the blades unlatched, allowing them to move to the feather position when oil pressure is removed.