11.2 Flashcards

1
Q

What is a boeing body buttock line known as on airbus aircraft?

A

The y reference plane which passes vertically through the fuselage

Example sentence: The y reference plane is used to define the body buttock line on Airbus aircraft.

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2
Q

What is a body station measured from?

A

A reference point in front of the fuselage

Example sentence: Body stations are crucial reference points for measuring various components on the aircraft.

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3
Q

Where are the body waterlines measured from?

A

A parallel plane below the aircrafts fuselage, body waterline 0

Example sentence: Body waterlines provide important reference points for the aircraft’s design and construction.

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4
Q

What is the wing station on boeing aircraft?

A

A vertical plane from the intersection of the extended leading edge and the wing buttock line, perpendicular to the rear spar

Example sentence: Wing stations help determine the precise location of wing components on Boeing aircraft.

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5
Q

What is the nacelle buttock line 0 on Boeing aircraft?

A

Angled inboard of the wing buttock line

Example sentence: The nacelle buttock line 0 plays a crucial role in the design and placement of engine components on Boeing aircraft.

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6
Q

What is the stabiliser chord plane on Boeing aircraft?

A

A plane through the leading and trailing edge of the stabiliser aerofoil, also known as the horizontal reference plane

Example sentence: The stabiliser chord plane is essential for determining the aerodynamic characteristics of the aircraft’s stabiliser.

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7
Q

Where is the horizontal stabiliser buttock line on Boeing aircraft?

A

Parallel to the body waterline and perpendicular to stabiliser chord plane

Example sentence: The horizontal stabiliser buttock line helps establish the positioning of the stabiliser relative to the aircraft’s body.

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8
Q

Where is the vertical stabiliser plane on Boeing aircraft?

A

Perpendicular to the centerline of the vertical stabiliser rear spar, also known as the fin station

Example sentence: The vertical stabiliser plane is crucial for ensuring the stability and control of the aircraft during flight.

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9
Q

How is the rudder station identified on Boeing aircraft?

A

90 degrees to the rudder hinge centreline

Example sentence: The rudder station plays a key role in determining the movement and control of the aircraft’s rudder.

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10
Q

What are the body coordinates on Airbus aircraft and their respective axis?

A

X longitudinal axis, Y lateral axis, Z vertical axis

Example sentence: Body coordinates provide a standardized system for locating and measuring components on Airbus aircraft.

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11
Q

What is the correct statement regarding airbus aircraft?

A

Wing stations are measured perpendicular to Rib 1, and not along the front spar.

Example sentence: The wing stations are crucial for accurate measurements.

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12
Q

Where is the nacelle station 0 on Airbus aircraft?

A

Wing stations are measured perpendicular to Rib 1 and not along the front spar.

Example sentence: The nacelle station 0 is an important reference point for engine placement.

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13
Q

Where is nacelle station 0 on airbus aircraft?

A

Aft of body station 0

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14
Q

On Airbus aircraft, how are the stabiliser coordinates indicated?

A

Only as stations EG: vertical stabiliser station and horizontal stabiliser station

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15
Q

What number is used to indicate major zone lower fuselage?

A

100

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16
Q

What number is used to indicate the major zone: upper fuselage?

A

200

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17
Q

What number is used to indicate major zone upper fuselage?

A

300

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18
Q

What number is used to indicate major zone power plant?

A

400

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19
Q

What number is used to indicate major zone left wing?

A

500

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20
Q

What number is used to indicate major zone right wing?

A

600

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21
Q

What number is used to indicate major zone landing gear?

A

700

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22
Q

What number is used to indicate major zone doors?

A

800

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23
Q

How are sub major zones identified?

A

By the second digit of the number code.

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24
Q

How can you identify which side a component is fitted to in the sub major zone numbering system?

A

Usually, the right hand side are even numbers and the left hand side are odd numbers

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25
Q

How are aircraft zones indicated?

A

By the third digit in the number code

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26
Q

What sequence does the numbering normally follow?

A

Forward to aft, inboard to outboard, bottom to top.

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27
Q

If one aircrafts structural component fails, another component will assume the load of the failed member. What is this called?

A

Fail safe

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28
Q

If serious damage occurs within the life of the aircraft, the remaining structure can withstand the reasonable loads without failure. What is this design concept known as?

A

Damage tolerance

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29
Q

Why is recording of fatigue life not necessary for large modern aircraft?

A

The structural design includes measures to ensure that the airframe will last indefinitely

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30
Q

Which main structural units does the aircraft consist of?

A

Fuselage, wings, flight control surfaces, stabiliser, and landing gear

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31
Q

Which statement describes a monocoque construction?

A

Monocoque construction uses formers, frame assemblies, and bulkheads to provide the shape of the fuselage, but the skin carries the primary loads

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32
Q

What is the definition of a longeron?

A

The main longitudinal members of a fuselage or nacelle

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33
Q

What is the definition of a tie rod?

A

A member carrying a tensile load

Example sentence: The tie rod is used to connect the control surface to the actuator.

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34
Q

What is the definition of a strut?

A

A member carrying a compression load.

Example sentence: The strut provides support to the wing structure.

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35
Q

In a stressed skin (semi monocoque) construction, which components carry the load?

A

Skin and framework together.

Additional information: The skin and framework work together to distribute the loads efficiently.

36
Q

What is the definition of a frame?

A

Lateral fuselage or nacelle member giving them sectional shape, often circular

37
Q

What is the definition of a rib?

A

A fore and aft sectional member of an aerofoil

38
Q

What is the definition of a spar?

A

The main spanwise member of an aerofoil

39
Q

What is the definition stringer?

A

A stiffener which assists sheet materials to carry loads along their length.

40
Q

What is the definition of a bulkhead?

A

A partition within structure usually lateral but can be longitudinal

41
Q

What is a crack stopper?

A

A re-enforcing member normally placed at right angles to the path of an anticipated crack.

42
Q

What loads are imposed on an aircraft when stationary?

A

Static loading

43
Q

What loads are imposed on an aircraft in flight?

A

Aerodynamic loading

44
Q

In true monocoque construction, what component carry the primary stress?

A

The skin

45
Q

What is the purpose of stringers and longerons?

A

They prevent tension, and compression from bending the fuselage

46
Q

What loads are carried by longerons?

A

Primary bending loads

47
Q

Which metals are treated by cadmium plating?

A

Steel

48
Q

What is the common pre treatment of aluminium alloys prior to painting?

A

Chromic, or sulphuric anodising

49
Q

In corrosion-prevention, what is the application of a thin layer of different metal commonly known as?

A

Sacrificial preservation

50
Q

What are the two divisions of paint coating?

A

Primer and top coat

51
Q

What is important regarding the water used for aircraft external cleaning?

A

It should not contain a high level of chlorine nor should it be acidic or alkaline as this could increase the risk of corrosion

52
Q

Which type of surface protection pre treatment is used on CRES?

A

Cadmium plating

53
Q

Where would you find the actual measurements relating to an aircraft that requires symmetry check?

A

Aircraft logbook

54
Q

What is used to close fuselage drains?

A

Cabin differential pressure

55
Q

A high intensity lighting strike can be identified by burn marks and holes of approximately ¼ inch in diameter

A

True

56
Q

What is meant by indirect lightning strike?

A

Damage to electrical system

57
Q

Bonding resistance when measured should not exceed which of the following values?

A

0.025 ohms

58
Q

What is the maximum number of terminals that can be attached to a single grounding stud?

A

4

59
Q

Where are dual grounds normally used?

A

In fuel vapour areas

Example sentence: Dual grounds are used in fuel vapour areas to prevent static electricity discharge.

60
Q

Which type of loads are floor beams designed to carry?

A

Tensional loads

61
Q

What do head markings of a close tolerance an bolt consist of?

A

A raised or recessed triangle

62
Q

Structural bonding is utilised in the adhesion of the following?

A

Stringers to fuselage skin

63
Q

What do vertical stabiliser attachments align with?

A

Fuselage frames

64
Q

A structure which allows loads diverted from one compressed component to pass through another is considered to be?

A

Fail safe

65
Q

A structure which multiple attachments points share the load instead of a single attachment point is an example of?

A

Damage tolerance

66
Q

Crack limiting joints assist with which philosophy?

A

Damage tolerance

67
Q

A structural design philosophy that incorporates ten 6mm diameter attachment fittings rather than one 50mm diameter attachments pin is?

A

Damage tolerance

68
Q

Condensing thousands of hours of realistic airframe stress loading into a short period of time is known as?

A

Fatigue testing

69
Q

Aircraft wings are generally subjected to what kind of stresses?

A

Tension and compression.

70
Q

The effect of circumferential tensile stress due to internal pressure is known as?

A

Hoop stress.

71
Q

Which of the following is the correct relationship?

A

Waterlines are horizontal planes

72
Q

Which of the following is the correct relationship?

A

Body stations are vertical planes

73
Q

Which of the following is the correct relationship? X axis

A

X axis runs from nose to tail.

Example sentence: The X axis of the aircraft is aligned from the nose to the tail.

74
Q

Which of the following is the correct relationship? Z axis

A

Z axis runs along the vertical stabiliser centreline.

Additional information: The Z axis is aligned with the vertical stabilizer centerline.

75
Q

Which of the following are parallel? Nacelle waterlines

A

Nacelle waterlines and wing reference plane

None

76
Q

Body buttock line zero on a jet aircraft would be in line with?

A

The vertical stabiliser

None

77
Q

How would a “right body buttock line” be represented on airbus aircraft?

A

-y

None

78
Q

How would a “left body buttock line” be represented on airbus aircraft

A

+y

None

79
Q

The flight deck floor on airbus aircraft would be?

A

Measured in mm from a fixed point on the z axis

None

80
Q

Which axis is the datum of the aircraft?

A

None

82

81
Q

Which zone would you find nacelle waterlines?

A

400

None

82
Q

The rear pressure bulkhead would separate which zones?

A

200-300

None

83
Q

Which zones are you likely to find the crew door?

A

200

None

84
Q

The nose undercarriage (zone 700) would generally be found within zone?

A

100

None

85
Q

The crew direct vision windows would generally be found in zone?

A

200

None