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power plant > Turbine Prop > Flashcards

Turbine Prop Flashcards

1
Q

Grease reduces the frictional resistance of parts and is easily molded into any form under pressure, this statement defines

A

Anti friction and Plasticity characteristics of grease

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2
Q

Engine operation at speeds lower than those which the constant speed propeller control can govern in the INCREASE RPM position, the propeller will

A

Remain in the full low pitch position

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3
Q

Determines oil and grease specification for lubrication of propellers

A

Propeller manufacturer

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4
Q

Blade tracking is the process of determining

A

Position of the tips of the propeller blades relative to eachother

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5
Q

Aircrafts propeller system beta range

A

Is used to produce ZERO or NEGATIVE THRUST

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6
Q

Blades station are measured from the

A

Hub center line

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7
Q

Counterweights on counter speed propellers are used to aid in

A

Increase blade angle

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8
Q

During what condition will blade pitch be the greatest

A

High speed and high altitude cruising flight

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9
Q

Force tend to increase propeller blade angle

A

Aerodynamic twisting force

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10
Q

How is a propeller in a large aircraft with turbo prop controlled

A

By the engine power lever

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11
Q

Identified as the cambered or curved side of propeller blade corresponding to the upper surface of a wing

A

Blade back

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12
Q

How is electrical power for propeller de icer system transferred from the ENGINE to propeller HUB

A

By slip rings and carbon brushes

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13
Q

Removal of blade tips within type certificate data sheets limits when correcting defects is

A

A major repair

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14
Q

Blade movement of a feathering propeller that is in the HIGH RPM position when feathering action begun

A

Low pitch THOUGH HIGH PITCH to feather position

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15
Q

Ice formation on propellers during flight will

A

Decrease thrust and cause excessive vibrations

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16
Q

Renders and aluminum allow propeller unrepairable

A

Transverse cracks of any size

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17
Q

Critical ranges are established to avoid

A

Severe propeller vibrations

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18
Q

Manually feathering a “HYDROMECHANICAL” propeller means to

A

Port governor oil pressure from the cylinder of the propeller

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19
Q

Surface treatment to counter the effects of dye penetrant inspection on prop is accomplished by

A

Washing off with solvent

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20
Q

Propeller blade stations increase from

A

Hub centerline to tip

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21
Q

Nico in aluminum allow propeller blades be repaired soon as possible in order to

A

Eliminate stress concentration point

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22
Q

Blade angle is the angle between

A

CHORD OF THE BLADE and the ROTATIONAL PLANE of the PROPELLER

23
Q

Dye penetrant inspection on prop is accomplished to detect

A

Cracks and other defects

24
Q

How is speed of propeller changed during flight

A

By changing the load tension against the flyweights in the governor

25
Q

Purpose of permanently sealing and partially filling hubs with dyed oil is to

A

Make the location of cracks readily apparent

26
Q

How is anti fluid ejected from the slinger ring on props

A

By centrifugal force

27
Q

Geometric pitch of prop is defined as the

A

Effective pitch plus slippage

28
Q

Angle of attack of rotating propeller blade is MEASURED between the blade chord or face and

A

Relative airstream

29
Q

Propeller governor controls the

A

Oil to and from the changing pitch mechanism

30
Q

Reason for careful inspection of minor surface scratches on aluminum allow propellers is to prevent

A

Fatigue failure

31
Q

If a flanged propeller shaft has dowel pins

A

The propeller can be installed in a given position

32
Q

Advantage of dye penetrant

A

It shows weather visible lines are cracks rather than scratches

33
Q

When engine power is increased constant speed propellers tries to function so that it will

A

Maintain RPM, increase blade angle, maintain low angle of attack

34
Q

Unit that control the output of the anti icing pump

A

Rheostat

35
Q

Thrust produced by rotating propeller is a result of

A

An area of decreased pressure immediately in front of the propeller blades

36
Q

Constant speed non feathering, mccauley, hartzell WITHOUT counterweights increase pitch angle using

A

Oil pressure

37
Q

Force causes the greatest stress on propeller

A

Centrifugal force

38
Q

Force tends to bend propellers forward

A

Thrust bending force

39
Q

Synchrophasing system allows pilot to reduce noose and vibration by

A

Adjusting the PHASE ANGLE between propellers

40
Q

Centrifugal force acting on a propeller

A

Is greater than aerodynamic TWISTING force and tends to move the blade to a lower pitch angle

41
Q

Repairs of nicks in aluminum prop must be made

A

Parallel to the length of the blade

42
Q

Purpose of a 3 way propeller valve

A

Direct oil from the engine oil system to the propeller cylinder

43
Q

Prepairing blade for inspection shouod be cleaned with

A

Mild soap and water

44
Q

Primary purpose of a feathering propeller is to

A

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

45
Q

How propeller speed governor on a turbo prop engine DECREASES RPM

A

By allowing oil to escape the propeller hub, driving the blades to an increase blade angle

46
Q

Propeller aerodynamic “Thrust” imbalance can be largely eliminated by

A

Correct blade contouring and angle setting

47
Q

Requires the use of propeller blade station

A

Measuring blade angle

48
Q

How steel propeller hub be tested for cracks

A

By magnetic particle inspection

49
Q

Function of automatic propeller synchronizing on multi engine is to

A

To control engine rpm and reduce engine vibration

50
Q

Actuates pilot valve in the governor of propeller

A

Governor flyweights

51
Q

Used to inspect aluminum propeller blade when crack is suspected

A

Dye penetrant

52
Q

Distance a propeller moves through the air during one revolution

A

Effective pitch

53
Q

Cold straightening an aluminum blade is accomplished by

A

A appropriately rated repair station or manufacturer

power plant (3 decks)

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