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POF Flashcards

POF

1
Q

In an aircraft which is spinning to left the application of ailerons to the right -

A

May delay the spin recovery

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2
Q

Longitudinal dihedral is a design feature used as a method of improving stability -

A

About the lateral axis

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3
Q

Directional stability is an aeroplane is achieved-

A

Through the vertical fin

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4
Q

When gliding into wind-

A

The glide angle will increase

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5
Q

If only rudder is applied during straight and level flight the following will occur-

A

Yaw followed by roll and a spiral dive

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6
Q

If the pressure of a parcel of air is kept constant and the -

A

Temperature is increased the density will decrease

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7
Q

The use of a Horn balance in an aeroplane -

A

Improves the aerodynamic balance of the controls

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8
Q

The layer of air in contact with the surface of an aerofoil during flight is referred to as -

A

The boundary layer

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9
Q

During a steady climb the arrangement of the four forces is such that -

A

Thrust is greater than drag

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10
Q

Mass balance extending ahead of the hinge line is attached to the leading edge of a control surface in order to -

A

Prevent control flutter

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11
Q

In oder to maintain altitude during a turn -

A

The angle of attack must be increased

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12
Q

The angle of attack pf an aeroplane is define as the angle -

A

Between the relative airflow and the chrod line

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13
Q

The relationship between the four forces in level flight is that -

A

Lift is equal to weight and thrust equal to drag

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14
Q

During a flapless approach to land rhe nose position of the aeroplane will in relation to a normal approach with full flap be -

A

Higher

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15
Q

Application of flaps during a turn will -

A

Decrease the stall speed

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16
Q

The stalling angle of attack of a particular aerofoil -

A

Will remain constant irrespective of airspeed, bank angle or weight

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17
Q

An anti-balance or anti - servo tab which is incorporated in a stabilator will -

A

Move in the same direction as the control surface

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18
Q

A change in pitch will cause an aircraft to rotate around its -

A

Lateral axis and centre of gravity

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19
Q

During entry into a left hand turn drom straight and level flight rudder is normally applied in the same direction as ailerons in order to -

A

Correct the andverse yaw created by lowering the aileron on the right wing

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20
Q

When climbing to clear obstacles in the take-off path an aeroplane should climb-

A

At the best angle of climb speed

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21
Q

An aircraft which has its CG to aft would -

A

Be difficult to control in pitch

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22
Q

An increase in the AOA of an aileron will -

A

Decrease in pressure above the wing and increase drag

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23
Q

Whilst maintaining straight and level flight-

A

The centre of pressure is located behind the CG

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24
Q

In order to maintain elevator control effectiveness when loading an aeroplane it would be better to -

A

Have forward CG

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25
Q

When climbing the maximum height gained in the shortest distance will be achieved -

A

By climbing at the best angle of climb speed

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26
Q

Induced drag is created by-

A

The lift produced by the wings

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27
Q

If the temperature of a dry parcel of air is kept constant-

A

An increase in pressure will result in an increase of density

28
Q

During a straight climb at a constant speed -

A

Lift is less than weight

29
Q

The total lift produced by the wings during a balanced lever turn must equal-

A

The vertical component of lift and the centripetal force

30
Q

A passenger carrying aeroplane is usually designed to have -

A

Dynamic stability

31
Q

During a glide -

A

Application of flap will reduce the best lift drag ratio

32
Q

The four forces acting on an aeroplane in a level flight are normally arranged so that-

A

An increase in thrust will cause the nose to pitch up

33
Q

In respect of an aeroplanes wing the term “ aspect ratio” refers to the ratio of -

A

The wingspan to the mean aerodynamic chord

34
Q

During autorotation stage of a spin to yhe left -

A

The left wing will have a greater angle of attack than the right wing

35
Q

The AOA of an aeroplane is defined as the angle-

A

Between the chrod line and the relative airflow

36
Q

Load factor is the term given to -

A

The resultant of centrifugal force and gross weight during a turn

37
Q

In order to initiate soin recovery the controls should be used in the following manner-

A

Rudder is applied before elevator

38
Q

An increase in induced drag can be expected-

A

When the AOA in increased

39
Q

The stalling angle of attack of an aeroplane -

A

Remains constant regardless of airspeed or weight

40
Q

The use of a Horn balance in an aeroplane-

A

Improves the aerodynamic balance of the controls

41
Q

The symbol V in the lift formula refers to -

A

TAS

42
Q

The lift force produced by an aerofoil always acts -

A

Perpendicular to the RAF

43
Q

The initial effect of uncorrected aileron drag or adversed aileron yaw is to -

A

Cause an initial yaw to the right when rolling

44
Q

Dust which is on the surface of a wing before flight will often still be there at the end of the flight because of -

A

Skin friction

45
Q

During level flight the CG is normally-

A

Located forward of the CP

46
Q

An anti balance or anti servo tab which in incorporated in stabilator will -

A

Move the same direction as the control surface

47
Q

The forces acting on an aeroplane in a climb are so arranged that -

A

The value of lift is less than that of weight

48
Q

Frise ailerons are a design feature which may be installed on some aeroplanes in order to -

A

Reduce aileron drag

49
Q

The angle between the aerofoils chord line and the RAF is referred to as -

A

The Angle Of Attack

50
Q

An aircraft which has its CG to far aft would -

A

Be difficult to control in pitch

51
Q

When in climbing to clear obstacles in the T/O path an aeroplane should climb -

A

At best angle of climb speed

52
Q

During the approach to a power of stall in level flight -

A

Contol effectiveness decrease at a steady rate

53
Q

Adverse aileron yaw (aileron drag) will be most noticeable-

A

At a angle of attack

54
Q

On an aerofoil the point through which the total lift acts is called the -

A

Centre of pressure

55
Q

In accordance with Bernoullis theory when air flows through the throat of the venturi tube -

A

The velocity increases and the pressure decreases

56
Q

The total lift produced by the wings during a balanced level turn must equal-

A

The vertical component of lift and the centripetal force

57
Q

The position which seperates the laminar air flow from the turbulent airflow around an aerofoil is call -

A

The transition point

58
Q

In comparison to a high aspect ratio wing a low aspect ratio wing will -

A

Create more induced drag

59
Q

Ailerons may have to be used to Prevent the aeroplane from underbanking during -

A

A gliding turn

60
Q

Frise ailerons are a design feature which may be installed on some aeroplanes in order to -

A

Reduce aileron drag

61
Q

As the angle of attack of an aerofoil in normal level flight is increased the centre of pressure will -

A

Move forward

62
Q

In terms of the ISA the sea level density of the air is -

A

1225 grammes per cubic meter and decreases with altitude

63
Q

True airspeed (TAS) is -

A

CAS/RAS corrected for temperature and altitude

64
Q

An aeroplane which has a high lift/drag ratio -

A

Will have a shallow gliding angle

65
Q

Whilst maintaining straight and level flight-

A

The centre of pressure is located behind the centre of gravity

POF (1 decks)

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