23. MODULE 17A (B1) — PROPELLER

32 multi-choice. Time allowed 40 minutes.

1 / 32

Electrical power supplies on large aircraft, for electrical deicing are.

DC

AC

Both AC or DC

2 / 32

In a turbo propeller twin engine system using FADEC, which synchronization method is most likely used?

Synchronization

Syncrophasing

Synchronization and Synchrophasing

3 / 32

A compound twin spool engine is

LP Compressor driven by a free turbine

turbo prop twin spool compressor

turbo prop propeller driven by a power turbine

4 / 32

On a free turbine engine it is possible to vary the propeller RPM whilst the engine RPM

by operating the PCU control Lever

it is not possible to vary the propeller RPM

by operating the Power lever

5 / 32

Adjustments to a variable pitch propeller are

made on the ground with the engine running

made in the air using the synchronizer

made on the ground with the engine stationary

6 / 32

On an underspeed condition the blades are turned to.

fine

coarse

feather

7 / 32

The oil used in the torquemeter system is.

DTD 5 8 5

engine oil pressure boosted by a pump driven off the reduction gear

PCU oil pressure

8 / 32

On a reversing propeller moving to the maximum reversing angle, the propeller

from fine pitch through plane of rotation, fine reverse then course reverse

from course pitch through plane of rotation course, fine reverse then course reverse

from fine pitch through plane of rotation, course reverse then fine reverse

9 / 32

Which of the following statements concerning the installation of a new fixed-pitch wood

NAS close-tolerance bolts should be used to install the propeller

If a separate metal hub is used, final track should be accomplished prior to installing the hub in the

Inspect the bolts for tightness after the first flight and again after the first 25 hours of flying

10 / 32

What are the optimal rotational speed and blade pitch angle requirements during take-off?

High speed and low pitch angle

Low speed and high pitch angle

High speed and high pitch angle

11 / 32

What is the purpose of the auto coarsening system?

To prevent overspeeding in the event of the flight fine pitch stop failing

To reduce drag during power loss

To save the pilot making minor changes when changing altitude

12 / 32

High speed aerofoils are employed at.

the root

the master station

the tips

13 / 32

Blade cuffs are fitted to the root of the blades.

to increase flow of cooling air into the engine nacelle

to increase the strength of the blade

to increase thrust

14 / 32

The advantage of the beta range is it allows.

low power settings with higher than normal pitch setting for ground manoeuvres

high power settings with higher than normal pitch settings when in flight

low fine pitch settings with high power

15 / 32

Repairs of aluminium alloy adjustable pitch propellers are not permitted to be made on

face

back

shank

16 / 32

The purpose of propeller blade twist is to:

Coarsen the blade angle at the root

Maintain a uniform angle of attack along the blade

Maintain a constant blade angle along the blade

17 / 32

When inhibiting a propeller off-wing, the blades are left in the

fully feathered position

fine pitch position

coarse pitch position

18 / 32

An aerodynamic braking propeller goes through

the fine pitch position to act as a brake

the feathered pitch position to act as a brake

the coarse pitch position to act as a brake

19 / 32

Propeller De-icing can be checked by.

visually checking for ice on the blades

checking the torque meter for abnormal readings

checking the the de-icing ammeter

20 / 32

When in the beta range, the propeller pitch is controlled.

indirectly from the power lever

directly from the power lever

directly from the pitch change mechanism to the PCU

21 / 32

If a flanged propeller shaft has dowel pins.

install the propeller so that the blades are positioned for hand propping

the propeller can be installed in only one position

check carefully for front cone bottoming against the pins

22 / 32

As propeller rotation speed increases, Centrifugal Twisting Moment will:

Remain constant through the RPM range

Decrease

Increase

23 / 32

With a propeller defect, the frequency of vibration will be.

higher than a turbine defect

lower than a turbine defect

higher than a auxiliary gearbox defect

24 / 32

Which of the following generally renders an aluminium alloy propeller

A transverse crack of any size

Any repairs that would require shortening and re-contouring of blades

Any slag inclusions or cold shuts

25 / 32

A propeller synchrophasing system allows a pilot to reduce noise and vibration by

adjusting the plane of rotation of all propellers

setting the RPM of all propellers exactly the same

adjusting the phase angle between the propellers

26 / 32

The limits for a tracking check are.

1/8 inch maximum difference between all blades

1/8 inch maximum difference between opposite blades

1/4 inch maximum difference between adjacent blades

27 / 32

The blade angle at the root is.

greater than the tip

same from tip to root

less than the tip

28 / 32

When running-up an engine and testing a newly installed hydromatic propeller, it is

seat the blades fully against the low pitch stop

remove any entrapped air

test the maximum RPM setting of the governor

29 / 32

The purpose of the pitch change cams is to.

convert rotary motion to linear motion

convert linear motion to rotary motion

prevent windmilling

30 / 32

Synchrophasing would primarily be used on:

All multi-engine aircraft

All aircraft

Single turbo-prop aircraft

31 / 32

A wooden propeller should be stored.

a warm but light storeroom

a dry and well ventilated area

in a room with high humidity to stop it drying and cracking

32 / 32

In an ‘on speed’ condition, oil in the tube

flows out of the tubes

flows in the tubes

remains constant

Your score is

The average score is 38%

0%

23. MODULE 17A (B1) — PROPELLER

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