MODULE 17 - MOCK TEST 30 MARKS

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Propeller Vibration occurs

1 point

A) If the propeller hub appears to swing in slight orbit

B) If the propeller hub does not appear rotate in an orbit

C) RPM improperly hub rotates on an absolutely vertical plane

Clear selection

Engine vibration occurs

1 point

A) If the propeller hub appears to swing in slight orbit

B) If the propeller hub does not appear rotate in an orbit

C) RPM improperly hub rotates on an absolutely vertical plane.

Clear selection

The propeller blade face is also subjected to

1 point

A) Tension from Centrifugal force

B) Tension from Centrifugal force and additional tension

C) Only Tension from the bending

Clear selection

A variable pitch propeller mechanism, for store long period should

1 point

A) Should be completely emptied and dried.

B) Be filled with special inhibiting oil to prevent condensation and corrosion.

C) Be filled with the normal operating oil to prevent condensation

Clear selection

In the ice formation on the propeller, when the aircraft is in flight will.

1 point

A) Decrease available engine power

B) Increase aircraft stall speed and increase noise

C) Decrease thrust and cause excessive vibration.

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If the propeller cone or hub cone seats show evidence of galling and wear the most likely cause is.

1 point

A) The propeller retaining nut was not tight enough during previous operation

B) The front cone was not fully bottomed against the crankshaft splines during installation

C) The pitch change stops were located incorrectly, causing the cone seats to act as the high pitch stop.

Clear selection

If there is any doubt as to whether the propeller de-Icing system is functioning properly it should be checked during an engine ground run.

1 point

A) Flow chat

B) Functional Test

C) Inhibiting

Clear selection

Propeller blade tracking

1 point

A) Tracking shows only position of the blade

B) Tracking shows only the relative position of the blade

C) Tracking shows only the relative position of the blade not their actual path.

Clear selection

Forces acting on a propeller are.

1 point

A. centrifugal, twisting, and bending.

B. torque, thrust and centrifugal.

C. torsion, tension and thrust.

Clear selection

Blade angle is taken from the chord and.

1 point

A. propeller shaft.

B. relative airflow.

C. plane of rotation.

Clear selection

If the blade angle is increased.

1 point

A. the pitch becomes finer.

B. the pitch becomes coarser.

C. lateral stability decreases

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Propeller efficiency is.

1 point

A. the ratio of output speed to input propeller speed.

B. the ratio of the work applied to the geometric pitch to useful work on the C.S.U.

C. the ratio of the useful work done by the propeller to work done by the engine on the propeller.

Clear selection

Torque acts

1 point

A. in the same direction as the plane of rotation.

B. at right angles to the plane of rotation.

C. in opposition to the direction of rotation.

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The purpose of blade twist is to.

1 point

A. reduce angle of attack at the blade root.

B. to ensure that tip speed does not go faster than Mach 1.

C. to even out thrust distribution across the propeller

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The chord line of a propeller is.

1 point

A. a line joining the leading and trailing edges.

B. a line joining the tip to the root of the blade.

C. a line joining the tips of the blades.

Clear selection

A fibreglass composite blade.

1 point

A. will never be struck by lighting.

B. does not require lightning strike protection.

C. requires lightning strike protection.

Clear selection

Torque sensing is used to.

1 point

A. reduce drag.

B. reduce drag following engine shutdown.

C. synchronise blade angle.

Clear selection

The minimum percentage seating on a propeller rear cone should be

1 point

A. 90%.

B. 70%.

C. 95%.

Clear selection

Total power of a turbo‐prop engine is measured in.

1 point

A. Equivalent Shaft Horsepower (ESHP).

B. Shaft Horsepower (SHP).

C. Brake Horsepower (BHP)

Clear selection

When the power lever on a turbo prop engine is moved from ground idle to flight fine the fuel flow increases and the blade angle.

1 point

A. increases.

B. decreases.

C. remains the same.

Clear selection

Blade stations are measured from the

1 point

A. centre of the hub.

B. tip.

C. shank.

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Counterweights are used to.

1 point

A. counter the ATM of the blades.

B. counteract the CTM of the blades.

C. balance the blades.

Clear selection

The constant‐speed control unit is also called a.

1 point

A. propeller pitch control.

B. accumulator.

C. governor

Clear selection

Pitch control using torque measuring is for.

1 point

A. reducing drag in engine failure.

B. increasing drag.

C. reducing drag in binding.

Clear selection

Geometric Pitch is the distance moved.

1 point

A. in one revolution.

B. in one revolution when slip is maximum.

C. in one revolution without slip.

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A right hand propeller.

1 point

A. rotates clockwise when viewed from the rear.

B. is always fitted to the starboard engine.

C. rotates clockwise when viewed from the front.

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The primary purpose of propeller is to.

1 point

A. change engine horsepower to thrust.

B. provide static and dynamic stability to aircraft.

C. create lift on the fixed aerofoils of an aircraft.

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The term spinner is applied to.

1 point

A. a propeller tip vortex.

B. a streamline covering over the propeller hub.

C. an acrobatic manoeuvre

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The constant speed unit (C.S.U.) governor works on the principle of

1 point

A. manual selection through a gearbox.

B. centrifugal twisting moments.

C. spring pressure acting against centrifugal force.

Clear selection

Low torque sensing is used to initiate.

1 point

A. relighting.

B. fine pitch selection.

C. auto feathering

Clear selection

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