Propeller

Question 1

The propeller system is divided into two type of control. What are they ?

Answer 1

One for flight and one for ground operation

Question 2

What is the purpose of a propeller ?

Answer 2

To create thrust and either pulling or pushing the aircraft through the air

Question 3

What are the two type of propeller configuration?

Answer 3

Tractor ( pulling) and pushing type

Question 4

What is the purpose of the metal tipping on a leading edge of a wooden propeller ?

Answer 4

It protect the propeller from damage caused by FOD In air ,landing, taxing , and takeoff

Question 5

What type of propeller has the blade angle built into the propeller and cannot be changed?

Answer 5

Fix pitch propellor

Question 6

What tool is used to determine propeller blade angle ?

Answer 6

Universal propeller protractor

Question 7

What are the aerodynamic force and load acting on a rotating propeller blade?

Answer 7

Centrifugal force , centrifugal twisting , aerodynamic twisting ,torque bending and thrust bending force

Question 8

What is the meaning of propeller blade “back “ and “face”?

Answer 8

Blade back is the side facing away from the engine , blade face is the side facing the engine and the pilot .

Question 9

What should you used to clean aluminum and steel propeller blade and hubs?

Answer 9

Suitable cleaning solvent using a brush or cloth

Question 10

Can a fixed pitch propeller’s pitch be changed ?

Answer 10

No they are fixed at specific angle

Question 11

Why do you put the blade of a counterweight propeller into high pitch before stopping the engine ?

Answer 11

This type of propeller has movable cylinder that slides over a fix piston. In high pitch position the cylinder moves inboard covers the piston protecting it from dirt and moisture in the air .

Question 12

Why are cones installed on splined shaft with a propeller ?

Answer 12

Cone center the propeller on the shaft as they are force toward each other by tightening of the nut

Question 13

How is feathering accomplished on a constant speed counter weight propeller ?

Answer 13

By releasing governor oil pressure on the counterweights . The featuring spring moves the blade to the feather position and oil return to the engine

Question 14

What type of system are used for deicing propellers ?

Answer 14

Fluid or electrical

Question 15

What is the purpose of slinger ring on some propeller installation ?

Answer 15

Deicing fluid is ejected from a stationary nozzle on the engine into a u-shape channel attached to the rear of the propeller assembly. Slinger ring is call the u-shaped channel

Question 16

What is blade tracking ?

Answer 16

To determine the position of tip of propeller blade relative to each other

Question 17

Do the counterweight on a constant speed propeller increase or decrease of the blade angle ?

Answer 17

Centrifugal force of counterweight increase the pitch of the blades

Question 18

What should you adjust if pilot request 50 more rpm on the aircraft equipped with a constant speed propeller ?

Answer 18

Adjust the governors prop-level set screw

Question 19

Why are propeller indexed to the crankshaft of an engine

Answer 19

To reduce vibration

Question 20

Can transverse cracks in a propeller be repaired

Answer 20

No

Question 21

What is the alpha range and beta range of a propeller?

Answer 21

Alpha range is the propeller position when aircraft is in flight. Beta range is the condition of the propeller during ground operation, and and reverse pitch position 

Question 22

When changing a metal bushing on a wooden propeller assembly, a thorough inspection of the bolt hole should be accomplish. Why?

Answer 22

To check for check for elongation of the holes

Question 23

How are wooden propellers cleaned?

Answer 23

Soap and water 

Question 24

What happened to a constant speed feathering propeller when the propeller governors oil pressure drops to 0 psi?

Answer 24

It returns to the feathered position

Question 25

What is the purpose of an arbor when balancing a propeller

Answer 25

To support the propeller on the balance knives

Question 26

What two forces are balanced in a propeller governor in an on-speed condition?

Answer 26

Speeder spring, and flyweight

Question 27

How do you determine a reparability of a damage propeller blade?

Answer 27

Manufactures maintenance manual

Question 28

When engine vibration is reported, what should be checked to determine if it is cause by the engine or the propeller

Answer 28

blade tracking and blade angle setting

Question 29

What position of a two bladed propeller are used during static balance test

Answer 29

vertical and horizontal position

Question 30

What adjustments are powerplant mechanics allowed to make on a prop governor?

Answer 30

Only the maximum rpm stop

Question 31

What three things does a typical constant speed, propeller governor accomplish when operating ?

Answer 31

Controls the amount of oil that flows to the propeller, sense the rotational speed of the engine, boosts engine oil pressure before it enters the propeller hub .