The angle between the propeller chord and the rotational plane of the propeller

The angle between the profile chord line and the relative air flow towards it

The angle between the rotational plane of the propeller and the relative velocity

To reduce drags on blades

To keep a nearly constant angle of attack

To optimize the distribution of lift results

Centrifugal force

Torque load

Brake moment

Constant speed propellers (pitch change from low (fine) to high (coarse) pitch) and Constant speed propellers with feathering and reverse (for turboprop engines)

Constant speed propellers with feathering position

All above.

No difference

Adjustable pitch propeller only can be changed on the ground when the engine is shut down and a variable pitch propeller the blade angle can be changed during operation\

A Variable pitch propeller only can be changed on the ground when the engine is shut down and a Adjustable pitch propeller the blade angle can be changed during operation

Propellers are categorized according to the material used for their blades. There are: Wood propellers, Metal propellers and Composite propellers

Propellers are categorized according to the material used for their blades. There are: Steel propellers, Metal propellers and Composite propellers

Propellers are categorized according to the material used for their blades. There are: Wood propellers, Metal propellers and Alluminum propellers

To reduce as little drag as possible

To reduce pilot’s work load

To help A/C stable.

In order to keep the pilot’s work load low if an engine loses power during take−off.

In order to keep the pilot’s work load low if an engine loses power during landing.

To help A/C stable during take-off

This result in difference of toque between engines

this results in vibrations in the aircraft structure which reduce the life span of the structure and additionally produce loud noise.

A/C can not keep stable during flight.

synchronizing systems automatically matches the Torque of one or several engiens to the Torque of the master engine

synchronizing systems automatically matches the revolutions of one or several propellers to the RPM of the master engine

synchronizing systems automatically matches the NH of one or several engiens to the NH of the master engine

Two: Fluid anti−icing system and Electrical de−icing system

Only one: Electrical de−icing system

Two: Electrical de−icing system and Hot air anti-icing system

Propellers can also be used as aerodynamic brakes by reversing the direction of air acceleration.

The propeller is linked to the propeller shaft by the hub.

Both A and B are correct.

an air mass is generated by the difference in pressure on the surfaces of the blades.

an air mass is accelerated by the difference in pressure on the surfaces of the blades.

an air mass is increased by the difference in pressure on the surfaces of the blades.

A propeller case and three or more propeller blades.

A propeller shaft and three or more propeller blades.

A propeller hub and two or more propeller blades.

Leading edge, trailing edge, blade root and blade tip.

Turbine, blade, hub and compressor.

Both A and B.

The geometry of the blade changes from the root to the tip.

The geometry of the blade changes from the leading edge to the trailing edge.

The geometry of the blade changes does not change.

Is the angle between the propeller chord and the profile chord line of the propeller.

Is the angle between the propeller chord and the relative air flow towards it

Is the angle between the propeller chord and the rotational plane of the propeller.

Immediately change of resultant relative air flow direction and velocity.

Gradually change of resultant relative air flow direction and air speed.

Gradually change of resultant relative air flow direction and velocity.

Wood propellers, metal propellers, composite propellers and plastic propellers.

Metal propellers, composite propellers and plastic propellers.

Wood propellers, metal propellers and composite propellers.

If the engine is shut down during flight, the propeller must be moved into the feathering position so that there is as little lift as possible.

If the engine is shut down during flight, the propeller must be moved into the feathering position so that there is as little drag as possible.

None of above is true.

Produce oil pressure for the pitch change mechanism.

Increase the engine’s thrust.

Turn off the unfeathering pump.

rotate at high RPM

operate at high forward speeds.

operate at supersonic tip speeds.

opposes CTM

is not related to CTM.

assists CTM

15 degrees

2 - 4 degrees

6 - 10 degrees

rotates clockwise when viewed from the rear

rotates clockwise when viewed from the front

is fitted to an engine on the left side of the aircraft

centrifugal, twisting, and bending

torque, thrust and centrifugal

torsion, tension and thrust

less than the tip.

same from tip to root

greater than the tip.

ATM

Torque

CTM

coarsen the blade angle at the root.

to maintain Blade Angle along the blade

to maintain Angle of Attack at the same value along the blade

bending, twisting and centrifugal

thrust, aerodynamic and tension

thrust and torque

low

high

master blade angle

propeller shaft

relative airflow.

plane of rotation.

Thrust and torque

Bending, thrust, torque.

Bending, CTM and ATM.

try to bend the blade away from the engine.

turn the blade about the lateral axis.

cause the tips to rotate at supersonic speeds

passes through coarse then fine

passes through coarse

passes through fine.

a positive pitch.

a position depending on rpm.

a negative pitch

the pitch becomes finer.

the pitch becomes coarser

lateral stability decreases.

lift and torque

lift and drag.

thrust and torque.

small mass of air at high velocity

large mass of air at low velocity

small mass of air at low velocity.

the ratio of output speed to input propeller speed.

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

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

in one revolution

in one revolution when slip is maximum

in one revolution without slip.

increase

decrease

remain constant through r.p.m. range

feathering

changing pitch.

rotation

angle of attack

blade angle

helix angle or angle of advance

SHP

forward speed.

turns the blade to windmill

turns the blades to high pitch

root

tip

is constant along the blade length

decreases from root to tip.

increases from root to tip.

take off and climb.

maximum economical cruise in level flight

landing and power checks

distance moved in one revolution

geometric pitch plus slip.

pitch measured at the master station

a small positive blade angle.

a small positive angle of attack.

a small negative angle of attack.

propeller underspeeding

maximum propeller drag.

Centrifugal Twisting Moment.

in the same direction as the plane of rotation.

at right angles to the plane of rotation

in opposition to the direction of rotation.

reduce angle of attack at the blade root.

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

to even out thrust distribution across the propeller.

at 70 to 80% of propeller length.

in the first 50%.

the same all along the length.

about its twisting axis.

bending forward.

towards the feather plane

less.

greater

equal

the master station

the tips

the root

rotates clockwise when viewed from the rear.

is always fitted to the starboard engine.

rotates clockwise when viewed from the front

lowest

Master Station value.

highest

more drag in feather

more drag in fine pitch.

more drag in coarse pitch

a line joining the leading and trailing edges.

a line joining the tip to the root of the blade

a line joining the tips of the blades.

the plane in which thrust force acts.

the plane in which the propeller rotates.

the angle at which the blade strikes the airflow.

intensifies the centrifugal forces to some degrees.

can be used in propeller design to reduce some operation stress

tends to bend the propeller blade forward at the tip.

Positive angle of attack, thrust negative

Negative angle of attack, thrust positive.

Negative angle of attack, thrust negative.

change engine horsepower to thrust.

provide static and dynamic stability to aircraft.

create lift on the fixed aerofoils of an aircraft.

prevent further engine damage when an engine fails in flight.

prevent propeller damage when an engine fails in flight.

eliminate the drag created by a windmilling propeller when an engine fails in flight.

will never be struck by lighting.

does not require lightning strike protection.

requires lightning strike protection.

birch

spruce

balsa.

strain gauges in the reduction gear.

stress gauges in the reduction gear.

pressure transducers in the reduction gear.

hydraulic oil as the pressure medium.

coiled spring levers as the pressure medium.

engine oil as the pressure medium.

for balancing

for protection.

for Anti-icing.

to increase the strength of the blade.

to increase thrust.

to increase flow of cooling air into the engine nacelle.

increase power.

increase pitch.

initiate auto-feather

reduce drag.

reduce drag following engine shutdown.

synchronise blade angle.

90%.

70%.

95%.

0° to plane of rotation.

20° to plane of rotation.

90° to plane of rotation.

torque meter.

propeller rear cone

front bearing in the reduction gear

Compounded twin spool

Direct coupled twin spool.

Free turbine.

Torque reaction at the reduction gear.

The ratio between engine thrust and engine torque.

Engine torque.

stationary cam.

torque tubes and eye bolts.

moving cam.

the front and rear cones

the front git seal.

the rear pre-load shims

blade tips to operate below the speed of sound.

blade tips to operate above the speed of sound.

blade tips to rotate slower than the root of the propeller blade.

locate the master spline.

ensure the master spline and blade alignment are in accordance with the MM

ensure fully seated.

Drainage.

Balancing.

Pivot points used during manufacture.

root to which the gear segment is fitted.

blade face or flat side.

blade back or curved side.

increasing blade chord.

increasing blade angle.

increasing blade thickness

uses an epicyclic reduction gear system.

uses a spur gear reduction system.

does not require a reduction gear system due to the propshaft being driven from the low speed compressor.

Equivalent Shaft Horsepower (ESHP).

Shaft Horsepower (SHP).

Brake Horsepower (BHP).

exhaust gas ingestion , high gas temperature and debris ingestion.

debris ingestion.

high gas temperature.

turbo prop propeller driven by a power turbine.

turbo prop twin spool compressor.

LP Compressor driven by a free turbine.

blade and spinner markings aligned.

below stop warning light on.

flight fine pitch stop lever withdrawn.

increases.

decreases

remains the same.

In inches from the centre of the hub.

In inches from the tip.

As a percentage of blade length from the tip.

DTD 5 8 5

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

PCU oil pressure.

Compound twin spool

Directly coupled.

One using a centrifugal compressor.

centre of the hub.

tip

shank

during landing.

during take off.

in the cruise.

There is only one gauge for all engines

same on all engines.

similar on all engines.

Engine would auto feather.

Engine would overspeed.

Engine would continue to run

provide aerodynamic breaking.

allow aircraft to taxi backwards

reverse the direction of rotation of the propeller

EAS

IAS

TAS

ducted props give more thrust for the diameter of disc.

only ducted propellers can be vectored

ducted props give less thrust for the diameter of disc

high pitch for take off and low pitch for cruise

low pitch for take off and climb and high pitch for cruise.

high pitch for take off, low pitch for climb and descent and high pitch for cruise.

Flight Idle and Ground Idle.

coarse and flight fine pitch

maximum reverse pitch and Flight idle pitch

counter the ATM of the blades.

counteract the CTM of the blades.

balance the blades.

the flat face

the leading edge.

the camber face.

datum.

highest.

lowest.

hydromatic propeller.

a tractor propeller

a pusher propeller.

two propellers on the same shaft on one engine-each revolving in a different direction.

propellers geared to rotate in the opposite direction to the engine.

propellers on a twin engined aircraft revolving in opposite directions.

the feathered pitch position to act as a brake.

the coarse pitch position to act as a brake.

the fine pitch position to act as a brake.

a propeller tip vortex.

a streamline covering over the propeller hub.

an acrobatic manoeuvre.