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Systems > 1 > Flashcards

1 Flashcards

1
Q

Highest temp in a gas turbine eng is?

A

In the primary (front) part of the combustion chamber.

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2
Q

The hot bat bus is powered:

A

Only by the aircraft battery.

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3
Q

Which is NOT an element of anti skid?

A

Pneumatic reserve braking.

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4
Q

Compared to a turbojet (pure jet) of the same thrust output, the high pressure turbine of a turbo-fan would be:

A

Smaller due to the reduced mass airflow.

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5
Q

Which is NOT air data computer output?

A

Pitch attitude.

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6
Q

Nose wheel steering follow up does what?

A

Commands the steering valve to select the nose wheel in neutral during gear retraction.

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7
Q

Shock wave conventional wing section; what are the characteristics of the airflow ahead and behind the ‘normal’ shockwave?

A

Supersonic ahead, subsonic behind with no change in airflow direction.

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8
Q

Throttle is set during a climb in a turbojet aircraft. What element is maintained as the aircraft climbs?

A

Fan speed (N1).

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9
Q

Vortex generators on a horizontal stab primarily does what?

A

Reduces turbulent flow separation & preserves elevator authority at all flight speeds.

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10
Q

What is the effect of dissolved water in Avtur fuel?

A

Increases SG and causes corrosion.

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11
Q

Tyres must be replaced when:

A

There is a bulge in the tread.

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12
Q

Air conditioner load on an engine can be relieved by:

A

Selecting the recirc fans on.

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13
Q

Body gear when fitted:

A

Turns in the opposite direction to nose gear to reduce tyre scuffing.

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14
Q

Spiral instability is worse when:

A

Directional stability is high compared to lateral stability.

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15
Q

Climbing at constant CAS, you’d expect Mach no. & TAS to:

A

Both increase.

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16
Q

Climbing at a constant speed just below VMO, you’d expect:

A

The MMO value to eventually be exceeded.

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17
Q

To reduce VMCG speed:

A

Decrease T/O thrust setting and/or move CoG forward.

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18
Q

A high-density altitude affects the VMCG speed in what way?

A

Decreases it.

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19
Q

With the loss of the right engine, which statement is most correct?

A

With a bank toward the live engine, less rudder deflection will be needed, and the skid ball will be slightly displaced to the live engine side

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20
Q

In aircraft with two engines mounted in pods beneath the wing, and one tail mounted engine with its thrust line up high (e.g. DC10) failure of the left wing mounted engine would see:

A

A requirement for pitch up trim, a yaw to the left, right rudder trim required

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21
Q

Regarding factors affecting VMCA, which statement is MOST correct?

A

High density altitude, dihedral, and skid induced blanketing of the live engine wing, reduce VMCA values

22
Q

Which statement is MOST correct about drag?

A

Induced drag is highest at the angle of attack for maximum lift

23
Q

Compared to a conventional wing a laminar flow wing has its position of maximum camber:

A

Further rearward

24
Q

In comparing MCRIT and MCDR of a supercritical wing to a conventional cambered wing:

A

MCRIT and MCDR are both higher

25
Q

FYI: Shark teeth or stall strips are fitted to the leading edges near the wing roots to stall first, and provide more stable static longitudinal stability at the stall

A

Copy

26
Q

Shortly after takeoff, a swept wing aircraft encounters a downdraft. Best recovery technique would be to:

A

Raise aircraft alpha to just less than stick-shaker speed

27
Q

Which statement best describes the properties of slots and LE flaps?

A

Slots and slats re-energise the boundary layer, slats and LE flaps increase the camber

28
Q

Leading edge decides:

A

Contribute most to lift values at high angles of attack

29
Q

The leading edge devices fail to extend on approach, but trailing edges do extend normally. You would expect what changes to approach alpha angle, drag, selected approach speed, and cockpit cut-off angle, compared to an approach with all high lift devices deployed

A

Lower alpha and drag, higher approach speeds, and improved view over the nose

30
Q

Which statement best describes properties a Zap flap?

A

Increases camber, drag and wing area. Deployment requires nose-up trim change

31
Q

Spoiler panels are:

A

located just ahead of the trailing edge flaps. Deflecting the roll spoilers up on the right wing will see the right wing aileron deflect upwards to initiate a roll to the right

32
Q

Shock waves form:

A

First over the upper wing surface where airflow reduces to below Mach 1. The lower shockwave forms later, but reaches the trailing edge before the upper

33
Q

Which statement is most correct as speed increases beyond MCRIT?

A

The centre of lift moves aft, lift reduces, and nose-down pitch moment occurs (Mach tuck)

34
Q

Which statement best represents the order of events as speed increases?

A

MCRIT, MCDR, speed of sound, MDET

35
Q

Which answer best describes the airflow qualities behind a normal shockwave?

A

Temp and pressure rise, velocity and Mach number decreases, density increases

36
Q

Airflow direction:

A

Through an oblique shockwave changes in direction but does not do so through a normal shock wave

37
Q

For high-flying jet aircraft featuring swept wings:

A

Low speed stall indicated airspeed increases cumulatively as altitude is gained

38
Q

‘Aerodynamic ceiling’ for a given aircraft is:

A

Lower with increased turbulence/greater bank angle

39
Q

Increased apparent gross weight does what if anything to the speed margin between initial buffet
speeds?

A

Reduces it

40
Q

An aircraft is cruising at a very high altitude and experiences buffet. This is:

A

High or low speed buffet

41
Q

To ensure correct flow direction is maintained in a hydraulic system you would fit a:

A

Check valve

42
Q

FYI: An advantage of pneumatics over hydraulics is that pneumatics has a faster response time

A

Copy

43
Q

Shuttle valves move:

A

Automatically should normal system pressure fail

44
Q

FYI: Most air transport jet aircraft use electrical starter mechanisms

A

Copy

45
Q

Ideal humidity for an aircraft cabin is:

A

30%

46
Q

Humidity level possible in a high-flying aircraft cabin is about?

A

30%

47
Q

Ideal temp range for humans is:

A

18-24oC

48
Q

FYI: Bleed air extraction during take off reduces take off and climb performance

A

Copy

49
Q

FYI: Air cycle machine basic advantage is its lightweight. Disadvantage is poor ground cooling & The lowest temperature achieved in air cycle machine is that expansion turbine outlet

A

Copy

50
Q

To achieve a ‘fail operational’ autopilot coupled ILS approach in a B767-300ER:

A

Three autopilots engage at 1500 ft radio altitude

Systems (28 decks)

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