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AeroCourse ATPL > Flight Ops > Flashcards

Flight Ops Flashcards

1
Q

What’s a main advantage of an axial flow compressor turbine compared to a centrifugal type

A

smaller frontal area

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2
Q

Engine Pressure Ration (EPR) is correctly defined as…

A

the ratio of turbine discharge total pressure to the total pressure at the compressure inlet.

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3
Q

What are the 2 options for reverse thrust on large turbofans?

A
  • pivoting blocker doors to deflect fan airstream forward
  • diverting air through cascade vanes on the side of the engine cowling
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4
Q

While in BETA, the power lever controls both…

A

fuel flow and prop pitch

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5
Q

What does the dafety out-flow valve do for the aircraft pressurization system?

A

prevents excessive pressure within the aircraft.

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6
Q

What does a negative pressure relief valve do?

A

prevents the outside air pressure from becoming more than the internal cabin pressure.

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7
Q

What does a hydraulic accumulator do?

A
  • absorbs power fluctuations or surges in the system
  • stores system pressure to provide backup in case of pump failure
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8
Q

What do aircraft use to compensate for variable system demands in the hydraulic system?

A

use variable displacement hydraulic pumps

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9
Q

Describe how an anti-skid system works?

A

anti-skid control module detects wheel speed is lower than the reference speed and sends a signal to release the brakes.

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10
Q

Induced drag is ___ proportional to the ___ of the speed.

A

inversely, square

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11
Q

When operating an aircraft in the slow flight speed range, the required power is greater than that for endurance because…

A

the L/D ratio is reduced and the drag increased

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12
Q

In order to maintain maximum range in constant winds, a pilot flying a turbojet should…

A

reduce power / indicated airspeed as fuel weight decreases

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13
Q

To double the speed you need to ___ the thrust.

A

quadruple (x4)

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14
Q

Name a wing feature that will improve lateral stability

A

dihedral

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15
Q

If a dihedral wing drops, the aircraft must first develop a ___ towards that wing before the dihedral design can provide the forces needed to bring the wings back to level.

A

sideslip

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16
Q

How does a fully aft CG effect aircraft stability?

A

decreased longitudinal stability about the lateral axis

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17
Q

An aircraft has greater longitudinal stability when the C of G is…

A

well forward of the centre of pressure

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18
Q

How many degrees of bank are required for a rate one turn at a TAS of 200kts?

A

27°

Formula: TAS/10 +7

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19
Q

Yoru normal stall speed is 95, what’s your stall speed in a 60° baked turn?

A

134kts

(95 * SQRT of 2)

  • 60° = 2G
  • 45° = 1.4G
  • 30° = 1.15G
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20
Q

Wing tip vortices would be at a MINIMUM for an aircraft flying at __ speed, with a ___ wing span, and in the clean configuration.

A

high, long

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21
Q

In respect to departing aircraft, vortex generation is most severe at what point?

A

the point immediately after rotation

22
Q

What configuration creates the most wake turbulence?

A

slow, heavy and clean configuration

23
Q

What’s is the critical engine on a 4 engine pro plane?

A

eith #1 or #4 outboard engines depending on prop rotation

24
Q

The speed of sound in the atmosphere is solely dependent on…

A

air temperature

25
Q

What’s the transonic flight range?

A

0.75 - 1.2 Mach

26
Q

The 2 types of airflow normally present within the transonic regime of flight are…

A

subsonic and supersonic

27
Q

When airflow passes through a shock wave, pressure ___, temperate ___, and velocity ___

A
  • pressure increases
  • temperature increases
  • velocity decreases
28
Q

What’s the critical Mach number?

A

The critical Mach number (Mcr or M* ) of an aircraft is the lowest Mach number at which the airflow over some point of the aircraft reaches the speed of sound, but does not exceed it.

29
Q

Limiting Mach number is…

A

the maximum operating speed in relation to the speed of sound.

30
Q

3 things to know about the Mach Meter

A
  • The instrument contains an airspeed capsule and an altitude capsule
  • Calculates the ratio between the aircraft’s TAS and the speed of sound
  • The same Mach number can occur at different indicated air speeds
31
Q

In high-speed aircraft, sweepback design is utilized to…

A

increase Critical Mach Number

32
Q

A large aircraft with a conventional straight wing will have a ___ Critical Mach number, while an aircraft with a swept wing will have a ___ Critical Mach number.

A

lower, higher

33
Q

An undesirable effect of Sweepback design in a jet is…

A

Dutch Roll tendency

34
Q

What do wing vortex generators do?

A

delay boundary layer separation

35
Q

What’s the purpose of leading edge flaps on large aircraft?

A

to increase the coefficient of lift by changing the camber of the wing

36
Q

What do wing slats do?

A

direct air from under the leading edge to the top of the wing at high angles of attack.

37
Q

What device is used on sweptback wings to decrease spanwise airflow and increase low-speed control effectiveness?

A

wing fences

38
Q

What do spoilers do on large transport aircraft?

A

reduce lift and increase drag

39
Q

Winglets reduce ___drag but do cause some increase in form drag.

A

induced

40
Q

Main advantage of CANARD design?

A

reduced stall speeds

41
Q

What do you call calibrated airspeed corrected for adiabatic compressible flow for a certain altitude?

A

Equivalent Airspeed

42
Q

What air conditions cause the highest indicated airspeed?

A

cold, dry air

43
Q

What are the 3 factors that affect hydroplaning?

A
  • speed of aircraft
  • tire pressure
  • water depth
44
Q

What’s dynamic hydroplaning?

A

when the tire lifts off the pavement and rides on the water and the wheels stop rotating

45
Q

The higher the psi of the tire, the ___ the speed it will hydroplane at.

A

higher

46
Q

The aircraft static source becomes blocked in cruise, what happens to airspeed if you descend?

A

descent = over read

climb = under read

47
Q

What’s the acceleration error you may notice on the attitude indicator during take-off?

A

a false climb indication

48
Q

Review the critical surfaces with regards to icing

A
  • wings
  • control surfaces
  • props
  • horizontal stabilizers
  • vertical stabilizers
  • upper surface of fuselage in the case of aircraft with rear mounted engines.
49
Q

Frost, ice or snow, the thickness of sandpaper can a decrease in lift by ___% and increase drag by ___%.

A

30%, 40%

50
Q

Following the application of Type I and Type IV fluid, you notice snow on top of the applied fluids, can you take off?

A

No

51
Q

With regards to de-icing/anti-icing, holdover time begins when the ___ application of a de-icing/anti-icing fluid commences and expires when the fluid _____.

A

final, looses its effectiveness

AeroCourse ATPL (7 decks)

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