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Screening > EK > Flashcards

EK Flashcards

1
Q

What are the forces acting on an aircraft in flight

A

Drag Thrust Lift and Weight

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2
Q

What is direct lift control

A

The elevator, stabilizer provide direct lift control

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3
Q

What are high lift devices

A

TE Flaps, LE Flaps. Slats

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4
Q

Define the two major types of drag

A

Profile+Induce drag = Total drag

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5
Q

What are high drag devices

A

TE flaps, spoilers, LDG, REV, braking parachute

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6
Q

How do you prevent span vise airflow on a wing especially swept wing

A

Fences, vortex generators

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7
Q

What is the purpose of vortex generators and fences

A

Reduce spanvise airflow and thereby reduce its effects

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8
Q

What are winglets and how do the work

A

Winglets are aerodynamically efficent surfaces located at the wing tips
They are designed to reduce INDUCED drag
They DISPENSE the s p a n w i s e airflow from the upper and lower surfaces at different points

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9
Q

How does a forward CG affect the stall speed

A

A CG forward Center of Pressure will cause a higher stall speed

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10
Q

What advantages does an aircraft gain from a swept wing

A

High mach cruise speeds
stability in turbulence

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11
Q

Where does a swept wing stall first

A

A simple swept or tapered wing will stall the the wing tip first

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12
Q

Explain speed stability

A

It s the beahviour of the speed after a disturbance at a fixed power setting

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13
Q

What is Mach number

A

Mach number is a true airspeed indication given as percentage relative to the local speed of sound

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14
Q

What is Mach crit

A

Mcrit is the aircrafts mach speed where the airflow over a wing becomes sonic

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15
Q

What is Mach tuck

A

It is the nose down pitching moment an aircraft experiences as it passes its critical mach number

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16
Q

What is the purpose of a mach trimmer

A

A mach trimmer is to compensate automatically for mach tuck above mcrit

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17
Q

What are the effects of compressibility

A

The effect of air being compressed onto a surface resulting in an increase in density and thus dynamic pressure rises above its expected value

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18
Q

What changes the aircrafts AOA at the stall

A

The movement of the Center of pressure point at the stall causes a change in the aircrafts angle of attack

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19
Q

What happens to the stall speed at high alt

A

Mach number compressibility effect on the wing results in a higher EAS actual equivalent airspeed compressibility error on the IAS increases the stall speed

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20
Q

What is a super stall

A

It is a stall from which the aircraft is unable to recover

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21
Q

What is dutch roll

A

an oscillatory instability - it is the combination of yawing and rolling motions

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22
Q

What causes a dutch roll

A

Swept wings

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23
Q

What are the three puposes of spoilers

A

Roll control, air speed brakes and ground lift dumpers

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24
Q

What are Krueger flaps

A

Leading edge flaps used to increase the wing chamber

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25
Q

How do flap affect TO run

A

Higher flap witihn the the TO range will reduce the TO GRD run for a given TO range

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26
Q

What is purpose of yaw and roll dampers

A

Prevent durch roll and coordinate turns

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27
Q

What are the four reasons for a variable incident tailplane / stabilizer

A

Provide a balancing for a large CG range cope with large trim changes large speed range reduce elevator trim drag

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28
Q

What is mass balance

A

Another form of aerodynamic balance control on a control surface

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29
Q

What are active controls

A

A surface that moves automatically / actively in response to non-direct inputs

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30
Q

What is engine torque

A

A force causing rotation

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31
Q

What is specific fuel consumption

A

The quantity of fuel consumed per hour divided by the thrust of engine in pounds

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32
Q

What is purpose of eng relight boundaries

A

Ensure correct proportion of air is delivered to the eng combustion chamber to restafrtt the eng in flight

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33
Q

Why are bleed valves fitted to gas turbine engines

A

To provide bleed air for aux sys regulate correct airflow px between eng sections

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34
Q

Is there a criticial eng on jet

A

no

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35
Q

How does INS IRS find true north

A

It is aligned to true north by its gyroscopes

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36
Q

Advantage INS

A

very accurate self contained totally global sys enabling ac to fly great circle tracks

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37
Q

Disadvantage INS

A

Bounded errors unbounded errors inherent sys errors

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38
Q

What is px alt

A

ISA height above 1013 pressure datum at which value represents that of the level under consideration

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39
Q

How does temp affect LSS

A

low temp low LSS

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40
Q

What are the ASI indications for blocked pitot and or static port

A

it remains a constant value

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41
Q

What is transport wander on an uncorrected gyroscope

A

it is a form of apparent wander - transport wander + apparent wander = total apparent wander

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42
Q

GPWS inputs

A

Baro alt for ROD calc, RA, Flap pos, Gear pos - ILS + GS Approach minima TL pos

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43
Q

Tire temp prior to TO depends on what factors

A

OAT Weight Taxi time amount of braking

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44
Q

Brake to get the hottest

A

Downwind brake with crosswind

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45
Q

What does a Constant Speed drive do

A

maintain ac freq output of an alternator constant normally 400hz

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46
Q

TORA

A

physial lenght of rwy

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47
Q

Screen height for jet

A

35

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48
Q

Stopway?

A

lenght of unprepared surface end of rwy capable of supporting ac

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49
Q

VMCG speed?

A

Min speed on grd for a multi eng ac

50
Q

What is Va speed

A

maneuvering speed

51
Q

VMCA speed?

A

min speed directional ctrl for multi eng in TO and clb config

52
Q

V2 speed?

A

TO safety speed

53
Q

V3 speed?

A

all eng to speed which ac achieves at screen height

54
Q

V4 speed?

A

all eng TO speed ac will achieve at 400ft

55
Q

what is MRC

A

speed for given weight and alt the max fuel mileage is achieved

56
Q

what is lrc

A

speed significantly higher than the max range speed

57
Q

what is pressure gradient force

A

natural generated force by difference in px across a horizontal distance

58
Q

what is a through

A

v shaped extension of a low px sys

59
Q

what is occluded front

A

combination oif cold and warm front

60
Q

what is a microburst

A

severe downdraft

61
Q

what is lowest usuable flight level

A

at least 500ft above the absolute minimum alt

62
Q

how is rvr reported

A

3 points toch mid stopend

63
Q

what does it mean if you have port wind in northern hemisphere

A

means your are flying toward a low pressure sys resulting in a descending flight path for a consisten alt pressure setting

64
Q

What is gliding distance for ac at 30000ft

A

best glide speed ülus rate of descent 30000/1000ft mikn 30min x 5NM/min 150NM

65
Q

Why does ac descent quicker when it is lighter

A

aircraft is restricted to a maximum speed during descent

66
Q

What do you need to see at CAT1 min

A

vis reference three cons lights ctrline of the approach lights or the touchdown or or or combination of these

67
Q

Types of aquaplaning?

A

Dynamic viscous rubber reversion

68
Q

What do we call the following ac mass plus oil unusuable fuel

A

basic empty weight

69
Q

What do we call the position from the datum of measurement to the moment

A

The arm

70
Q

What risk does cumuliform clouds create when found in stratus cloud

A

Embedded thunderstorms

71
Q

What system controls braking during RTO

A

Auto brake sys with anti skid protection

72
Q

For a 2 eng ac what are return airfield requirements

A

60min se airspeed unless etops approval

73
Q

TO minima for 2 crew

A

800m unless company has dispo crew approval

74
Q

What level windshear

A

all levels

75
Q

Where is the FAF point on an ILS

A

GS intercept / maltese cross is for non prec

76
Q

Where can you intercept the ILS approach

A

by min alt & GS intercept unless being radar vectored

77
Q

What determines your choice of HF

A

Pos of sun in the sky during the day ionosphere is lower that at night therefore lower freq is req to travel

78
Q

What does the rudder psi reducer do

A

take stress of vertical fin

79
Q

What cloud turbulence

A

lenticular

80
Q

What effect do slats have on the angle of attack

A

it will increase

81
Q

What is definition of ASDA

A

TORA + length of Stopway

82
Q

A sea breeze is

A

daytime midday when land heats up quicker than sea

83
Q

What are indications of T-VASI

A

Cross bar indicates on slope and deviations appear or three lights above or below the cross bar

84
Q

balabced field length

A

TODA = ASDA

85
Q

During what months would you fog in Dubai

A

winter months Nov - April

86
Q

Effect of 60deg bank turn have on a stall

A

stall speed increases by approx 40%

87
Q

For a given speed how does your rate of descend vary with weight

A

increase in weight will increase your ROD

88
Q

Which of TORA ASDA TODA does clearway change

A

TODA

89
Q

What is the outbound entry timing in a hold

A

up to FL140 1min above FL140 1,5min

90
Q

Why does Airbus have a tail tank

A

To increase range and provide trim

91
Q

Which months is the monsoon season in SE Asia

A

Nov-Feb

92
Q

What happens to airspeed in climb with blocked pitot

A

over read

93
Q

What happens to airspeed in descent with a blocked static port

A

overread

94
Q

IF after 120nm you are 4nm off course what heading correction should you use to regain track in 60nm

A

4nm

95
Q

What is parasite drag

A

px and skin friction drag caused by any surface which deflects or interferes with the smooth airflow

96
Q

Lift by wing varies with angle of attack such that it

A

produces max lift just before stall angle is reached - when ac wing reaches stall angle the wing stops generating lift

97
Q

Normal squawks

A

2000 / 3000

98
Q

FL140 holding speed

A

230

99
Q

For the same eng what is the difference between N1 and thrust when the eng is taken from sea level to a hot / high field

A

n1 and thrust will increase

100
Q

For planning normal diversion fuel must be calculated with which speed

A

LRC

101
Q

Where avbl using a lower flap setting for take off will

A

inc MTOW and V1 VR V2 normally 2nd segment is more limiting)

102
Q

Does a compressor change kinetic energy into pressure energy? If so are the stators divergent or convergent

A

Yes however an axial flow compressor on a modern turbofan eng uses a series of convergent and divergent ducts

103
Q

Whilst maintaining a constant attitude what is the effect of flaps and slats on the angle of attack

A

AOA will DECREASE

104
Q

What is the effect of eng bleed air for AC and anti ice on TO perf

A

TO perf is reduced

105
Q

Besides using the scale where can yopu measure dist on JEP chart

A

lines of longtitude

106
Q

why swept wings

A

high cruise mach low drag

107
Q

what to see when VASI on glide path

A

2 white 2 red

108
Q

a forward or aft CG is more efficient

A

aft reduces tailplane force which reduces aerodynamic drag

109
Q

can an increase in clearway increase mtow

A

yes

110
Q

Cleatrway will increase / decrease MTWO and increase / decreasde V1?

A

increase MTOW Decrease V1

111
Q

If you lenthen clearway what happens to v1

A

will decrease

112
Q

Anabatic wind is

A

blow up steep slop or mountain daytime calm sunny weather

113
Q

northern hemishere the diurnal variation of wind about 2000 is such that

A

increasing speed and wind direction will veer

114
Q

on the indian sub continent the northeasterly monsoon occurs

A

between June and Sep

115
Q

A direct entry hold pattern is made from sector

A

3

116
Q

When flying NDB using RMI to regain track you

A

must first fly trhough the needle

117
Q

a katabatic wind is

A

a local valley wind that flows down the side of hill

118
Q

buy ballots law states that

A

back to the wind in NORTH HEMIS the LOW pres and temp will be on your left

119
Q

DME range at FL350 is

A

229nm

120
Q

centre of lift moves

A

distribution of pressure and Centre of PX will be further FWD the higher AOA

121
Q

when the CG is moved aft of the CP

A

will cause lower stall speed

Screening (6 decks)

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