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module 11b > 11.1.2 - High Speed Flight - 3q > Flashcards

11.1.2 - High Speed Flight - 3q Flashcards

1
Q

What is the formula for Mach number?

A
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2
Q

What is the relationship between speed of sound and temperature?

A
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3
Q

What is the speed of sound value?

A
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4
Q

What happens Velocity,pressure and density in a converging and diverging at Subsonic?

A
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5
Q

What happens Velocity,pressure and density in a converging and diverging at Supersonic?

A
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6
Q

Subsonic =
Transonic =
Supersonic =
(values)

A
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7
Q

What happens shock waves as speed increases?

A
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8
Q

In a Sweepback wing, describe shock wave, mach cone and MAC

A
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9
Q

Mach Trim
* Speeds up, CofP moves in what direction with what nose attitude
* Mach range?
* Is it active if the A/P disconnects?

A
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10
Q

When is air compressible (mach number)?

A
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11
Q

What happens mach number is the A/C descends at constant true air speed?

A
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12
Q

Where does a shockwave form on the wing and which direction does it move?

A
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13
Q

When speed is greater than mach 1, what type of sonic speed is the boundary layer?

A
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14
Q

Before reaching Mach Crit, what happens nose and why?

A
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15
Q

Accelerate through the transonic region, CofP moves in what direction?

A
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16
Q

Incipient shock wave will do what to speed, temp and density?

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17
Q

What happens Drag coefficient above Mach Crit?

A
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18
Q

To increase Mach Crit, what type of wings are used?

A
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19
Q

A Mach trimmer does what?

A
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20
Q

Mach Number formula is what? (speed)

A
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21
Q

What type of airflow occurs in the Transonic region?

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22
Q

Downstream of an oblique shockwave is what?

A
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23
Q

Wave drag increases where?

A
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24
Q

Flying above Mach Crit will cause what pitch attitude?

A
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25
Q

Shock stall causes what?

A
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26
Q

What happens pressure and temp. with a Normal shock wave?

A
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27
Q

Downstream of a normal shock wave is what?

A
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28
Q

Tuck under is caused by what?

A
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29
Q

Shock wave appears at what point of the wing?

A
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30
Q

ATA zone 500 is the
engine
right wing
left wing

A

left wing

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31
Q

A structure which, if it failed, would cause aircraft to crash is
primary
integral
essential

A

primary

32
Q

The method used on a work card to indicate the approximate location of a component is
stations
datum
zones

A

zones

33
Q

A loss of strength resulting from cyclic loading is known as
metal fatigue
age hardening
fail safe

A

metal fatigue

34
Q

When doing a bonding check the maximum resistance between component and earth is
0.005 ohms
1/50 ohms
50 milliohms

A

50 milliohms

35
Q

The fuel drain of a combustion heater must be protected from
ice build-up
lightning strike
accidental damage

A

ice build-up

36
Q

Engine mounts provide for
longitudinal movement
torsional movement
lateral movement

A

longitudinal movement

37
Q

What does a Body station refer to?
the vertical line along the aircraft
the vertical line going through centre of the longitudinal axis of the aircraft
the stations on tailplanes

A

the vertical line along the aircraft

38
Q

Structural members of a conventional fuselage in the Longitudinal plane are called
Spars and ribs
Longerons and stringers
Spars and stringers

A

Longerons and stringers

39
Q

How is damage to the nose cone of an aircraft prevented during a lightning strike?
Earthing strap
Lightning diverter strip
Special paint

A

Lightning diverter strip

40
Q

Tension is the stress of
elongating or stretch
crush or compression
twisting

A

elongating or stretch

41
Q

A Fuselage Station is a
lateral point on aircraft fuse
longitudinal point on the aircraft fuselage
lateral point on aircraft wing

A

longitudinal point on the aircraft fuselage

42
Q

Semi-monocoque fuselage structure normally?
Carries tensile loads
Carries compressive loads
Carries only dynamic loads

A

Carries tensile loads

43
Q

Modern aircraft fuselage construction is normally?
Truss type and Framework construction
Monocoque monolithic composite
Monocoque and Semi-monocoque construction

A

Monocoque and Semi-monocoque construction

44
Q

ATA Zone 100 is
upper fuselage
lower fuselage
left-hand wing

A

lower fuselage

45
Q

The bonding lead to a remote aircraft component must be
Tested to make sure it does not exceed 0.05 Ohms in primary structure
1 Ohm in areas with Flammable fluids
Both of the above are correct

A

Both of the above are correct

46
Q

What force is an I-Beam subjected to?
Tension
Bending
Shear

A

Bending

47
Q

Bulging / skin swelling between rivets on skin might indicate what condition?
An over-pressurisation
Corrosion between skin and internal structure
Temperature shock to structure

A

Corrosion between skin and internal structure

48
Q

A wing spar section is?
Two flanges / spar caps separated by a web
One flange section between two webs
Two webs bolted to spar caps

A

Two flanges / spar caps separated by a web

49
Q

Precise points are located on an aircraft by a system of
frame stations, vertical lines and lateral lines
frame stations, water lines and buttock lines
longitudinal, vertical and lateral lines

A

frame stations, water lines and buttock lines

50
Q

Which of the following is an example of a fail safe structure?
Longeron
Stringer
Spar

A

Stringer

51
Q

Damage tolerant design
is applied only to secondary structure
allows for certain damage to the structure to go un-repaired between scheduled maintenance
allows for damage to structure by distributing loads to other structure

A

allows for certain damage to the structure to go un-repaired between scheduled maintenance

52
Q

In the ATA 100 zonal system the passenger entry door will have a designation of
400
800
600

A

800

53
Q

Which material is an upper wing skin usually made from and why?
7075 due to its ability to withstand tension on the ground and during landing
2024 due to its ability to withstand compression on the ground and during landing
7075 due to its ability to withstand compression during flight

A

7075 due to its ability to withstand compression during flight

54
Q

Which area of the aircraft is subjected to hoop stress?
Wings
Pressure cabin
Control surfaces

A

Pressure cabin

55
Q

What are false ribs?
Rib that is used for positional identification
Rib to increase strength at parts of the wing which may hit birds
Control surfaces Ribs at either end of a Kruger slat

A

Rib to increase strength at parts of the wing which may hit birds

56
Q

Shear stress is described as
compressing forces
pulling forces
slip away under the action of forces

A

slip away under the action of forces

57
Q

Stringers are normally made out of
Pre-stressed Aluminium sheets
Aluminium extrusions
Aluminium forgings

A

Aluminium extrusions

58
Q

Where on an aircraft is FS245, RWS45?
245 inches from the nose of the aircraft and 45 inches from the centreline of the right wing
245 inches from the datum line of the aircraft and 45 inches from the centreline of the right wing
245 inches from the nose of the aircraft and 45 inches from the tip of the right wing

A

245 inches from the datum line of the aircraft and 45 inches from the centreline of the right wing

59
Q

How is the radome protected from lightning strike?
Special paint
Special grease on the hinges
Diverter strips

A

Diverter strips

60
Q

If you short the two prongs with the single prong of a bonding tester together, what would the gauge read?
Centre scale
Zero
Full scale deflection

A

Zero

61
Q

Semi-monocoque construction
is used only for the fuselage
utilizes the safe-life design concept
offers good damage resistance

A

offers good damage resistance

62
Q

Most radio aerials are
not bonded
bonded
insulated from the fuselage

A

bonded

63
Q

Fuselage fatigue life is affected by:
Pressurisation cycles
Environmental factors
Turbulance and high speed flight

A

Pressurisation cycles

64
Q

Water Lines (WLs) are measured points on a
wing line
horizontal line
vertical line

A

vertical line

65
Q

A Main structural longitudinal member in a fuselage is?
a longeron
Stressed skin
Stringer

A

a longeron

66
Q

The various parts of the aircraft airframe are maintained at the same potential by
earthing
bonding
static wicks

A

bonding

67
Q

What governs the ultimate fatigue life of an aircraft?
Landings
Flying hours
Pressure cycles

A

Flying hours

68
Q

The main forces on an aircraft structure are
tension, compression, torsion and shear
tension, compression, twisting and shear
tension, compression, twisting and shear

A

tension, compression, torsion and shear

69
Q

Shear is commonly dealt with in splice joints by?
Rivets
Bonding sealant
Bolts

A

Rivets

70
Q

The fuselage fatigue life is affected bt
Pressurisation cycles
Environmental factors
Take off and landings

A

Pressurisation cycles

71
Q

The life of the structure is counted by
flying hours
G loadings
pressurization cycle

A

flying hours

72
Q

What are buttock lines?
Vertical measurement lines
Horizontal measurement lines
Measurements from the centre line

A

Measurements from the centre line

73
Q

The load carrying structure monocoque design is/are:
The skin
Skin and the stringers
The skin, the stringers, the frames and the bulkhead

A

The skin

74
Q

Aircraft fibreglass panels are protected against lightning strikes, partically by
Metallized fabrics and fibers or mesh
non-conductive paint
bonding

A

Metallized fabrics and fibers or mesh

75
Q

A member taking a compression load is called a
beam
strut
cable

A

strut

76
Q

Stringers are used in which of the following types of aircraft fuselage construction?
Semi-monocoque
Truss type
Monocoque

A

Semi-monocoque

module 11b (42 decks)

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