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Navy Airframes > AM Book Ch 2 Aircraft Construction & Materials > Flashcards

AM Book Ch 2 Aircraft Construction & Materials Flashcards

1
Q

What does the airframe of a fixed-wing aircraft consist of?

A

5 principal units: fuselage, wings, stabilizers, flight control surfaces, and landing gear

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2
Q

What does the airframe of a rotary-wing aircraft consist of?

A

Fuselage, landing gear, main rotor assembly, and tail rotor.

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3
Q

How many principal structural units are there on a fixed-wing (conventional) aircraft?

A

9: fuselage, engine mounts, nacelle(s), wings, stabilizer(s), flight control surfaces, and landing gear, arresting gear, and catapult equipment.

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4
Q

What is the main structure or body of the aircraft to which all the units attach?

A

Fuselage

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5
Q

What provides space for crew, passengers, cargo, most of the accessories, and other equipment?

A

Fuselage

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6
Q

The monocoque design can be divided into how many classes?

-monocoque design relies largely on strength of of skin or shell to carry various loads.

A

3: monocoque, semi-monocoque, reinforced shell

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7
Q

How is monocoque reinforced?

A

Has its only reinforcement vertical rings, station webs, and bulkheads

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8
Q

How is semimoncoque reinforced?

A

With same monocoque features and with addition with skin is reinforced by longitudinal members, that are stringers and longerons, but no diagonal web members.

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9
Q

How is reinforced shell reinforced?

A

By a complete framework of structural members.
Cross sectional shape= bulkheads, station webs, and rings,
Longitudinal contour with longerons, formers, and stingers. The skin is fastened to all these members, primarily Carrie’s the shear load and together with longitudinal members Carrie’s loads of tension and bending stresses.

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10
Q

How is the longitudinal contour developed?

A

Longerons, formers, and stringers

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11
Q

What materials is a semimonocoque fuselage co trusted primarily by?

A

Aluminum alloy, newer A/C use graphite epoxy composite. Steel and titanium are found in areas subject to high temperatures.

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12
Q

What absorbs primary bending loads?

A

Longerons

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13
Q

What structure carry concentrated loads where fittings attach other units like what?

A

Vertical members referred to bulkheads, frames, and formers.
Units that attach to it are wings, engines, and stabilizer.

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14
Q

How many sections are in fuselage in small aircraft compared to larger aircraft?

A

Small aircraft= 2 or more sections
Larger= 6 sections.

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15
Q

Station markings?

A

Various points in fuselage located by station number. A station on aircraft may be a rib or frame number

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16
Q

Fuselage Stations (FS)are neasured in?

A

Station 0 is @ or near nose of aircraft. Other stations are distances measured in inches aft of station 0.

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17
Q

Vibrations originating in the engine are transmitted to aircraft structure through the ___?

A

Engine mounts

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18
Q

Nacelles are similar in shape and design for the same size aircraft. Larger aircraft require less fairing therefore _____ nacelles.

A

Smaller

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19
Q

I’m certain cases the ____ is designed to transmit engine loads and stress to the ____ through the engine mounts.

A

Nacelle,
Wings

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20
Q

Internal structure of wings running spanwise?

A

Spars and stringers
Spars are main structural members of wing, often referred to as “beams”.

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21
Q

Internal structure is wings running chordwise (leading edge to trailing edge)?

A

Ribs and formers

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22
Q

What’s a box beam construction?

A

The stringers and sparlike sections are joined together in a box shaped beam. Remainder of wing is constructed around the box.

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23
Q

How many variations are there for wing construction?

A

3, monospar, multispar, and box beam

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24
Q

*1. How many principal structural units are there in a fixed wing aircraft?

A

5,
Fuselage, wings, stabilizers, flight control surfaces, and landing gear

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25
Q

*2. On a semi monocoque fuselage, what component absorbs the primary bending loads?

A

Longerons

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26
Q

2-1: The shimmy damper on a nose landing gear assembly prevents the nosewheel from shimmying during takeoff and landing by what means?

A
  1. By actuating a low-rate gear train
  2. By forcing a rotary bar to move against a
    friction plate
  3. By accentuating sudden torque loads ap-
    plied to the nose wheel
  4. By metering hydraulic fluid through a
    small orifice between two cylinders or
    chambers
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27
Q

2-2: What component is used to hold the arresting hook in the down position to prevent it from bouncing when it strikes the carrier deck?

A
  1. A snubber
  2. A drag ling
  3. A cable assembly
  4. A liquid centering spring
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28
Q

2-3: When comparing catapult hookup methods on a carrier, the nose gear launch method is superior to the holdback pendant method for all EXCEPT which of the following?

A
  1. It saves time
  2. It cost less to operate
  3. It requires fewer personnel
  4. It is the safest method
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29
Q

2-4: Which of the following helicopter components provide(s) lift?

A
  1. The engines
  2. The fuselage
  3. The tail rotor
  4. The rotor blades
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30
Q

2-5: What main landing gear component of a helicopter includes the weight-on-wheels sensing switch?

A
  1. Left main landing gear
  2. Right main landing gear
  3. Tail gear
  4. Sponson
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31
Q

2-6: The tail landing gear of a helicopter is capable of swiveling how many degrees?

A
  1. 45°
  2. 90°
  3. 180°
  4. 360°
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32
Q

2-7: What type of spar is used in the construction of a rotor blade?

A
  1. Aluminum spar
  2. Magnesium spar
  3. Titanium spar
  4. Nickel spar
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33
Q

2-8: How many rotor blades are attached to the main rotor head of an H-60 helicopter?

A
  1. Two
  2. Three
  3. Four
  4. Five
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34
Q

2-9: Which of the following components is NOT a part of the tail pylon of a helicopter?

A
  1. The intermediate gearbox
  2. The tail gearbox
  3. The horizontal stabilator
  4. The swash plate
35
Q

2-10: What type of stress is defined as “stress exerted when two pieces of fastened material tend to separate”?

A
  1. Tension
  2. Compression
  3. Shear
  4. Bending
36
Q

2-11: What type of stress is produced in an engine crankshaft while the engine is running?

A
  1. Torsion
  2. Bending
  3. Compression
  4. Tension
37
Q

2-12: What structural metal is lightweight, strong, and corrosion resistant?

A
  1. Magnesium
  2. Titanium
  3. Nickel
  4. Aluminum
38
Q

2-13: What is the largest portion of metal present in an alloy?

A
  1. Main metal
  2. Base metal
  3. Foundation metal
  4. Major component metal
39
Q

2-14: What high tensile metal is used to manufacture tubes, rods, and wires?

A
  1. Aluminum
  2. Titanium
  3. Magnesium
  4. Alloy steel
40
Q

2-15: What does the core material of reinforced plastic consist of?

A
  1. Honeycomb structure
  2. Fiber cloth
  3. Bonding material
  4. Liquid resin
41
Q

2-16: The strength of all metals is closely related to what other characteristic?

A
  1. Hardness
  2. Denseness
  3. Brittleness
  4. Conductivity
42
Q

2-17: What property of a metal allows for little
bending and deformation without shattering?

A
  1. Hardness
  2. Brittleness
  3. Malleability
  4. Ductility
43
Q

2-18: What metal property allows a metal to be
hammered, rolled, or pressed into various
shapes without cracking or breaking?

A
  1. Brittleness
  2. Malleability
  3. Ductility
  4. Elasticity
44
Q

2-19: What metal property allows a metal to be
permanently drawn, bent, or twisted into
various shapes without breaking?

A
  1. Brittleness
  2. Malleability
  3. Ductility
  4. Elasticity
45
Q

2-20: What metal property allows a metal to carry heat or electricity?

A
  1. Ductility
  2. Fusibility
  3. Conductivity
  4. Malleability
46
Q

2-21: When all other metal properties are equal, what method of joining metals structurally has the greatest advantage?

A
  1. Welding
  2. Brazing
  3. Riveting
  4. Soldering
47
Q

2-22: The intermediate shape of steel that has width greater than twice the thickness and from which sheets are rolled is known by what name?

A
  1. Slab
  2. Bloom
  3. Ingot
  4. Billet
48
Q

2-23: What metal working process is used to make wire?

A
  1. Pressing
  2. Extruding
  3. Hammering
  4. Cold drawing
49
Q

2-24: What metal working process involves the
forcing of metal through an opening in a die?

A
  1. Extruding
  2. Cold drawing
  3. Cold working
  4. Cold rolling
50
Q

2-25: While holding a piece of metal against a
revolving stone, you see red sparks leave the
stone and turn to straw color. This is what type
of metal?

A
  1. Low-carbon steel
  2. Nickel steel
  3. Wrought iron
  4. Cast iron
51
Q

2-26: What is the prime characteristic of aluminum?

A
  1. Lightweight
  2. Low melting point
  3. Ease of fabrication
  4. Corrosion-resistant properties
52
Q

2-27: An aluminum alloy containing manganese as the major alloying element is identified by what number?

A

A. 1035
B. 2014
C. 3003
D. 7010

53
Q

2-28: What aluminum alloy should be used when the highest strength is necessary?

A

A. 1100
B. 2014
C. 5052
D. 7178

54
Q

2-29: Alclad is an aluminum alloy with a protective coating of what material?

A

A. Manganese
B. Pure aluminum
C. Zinc chromate
D. Aluminum oxide

55
Q

2-30: Titanium becomes brittle and worthless after exposure to temperatures above what number, in degrees Fahrenheit?

A

A. 500
B. 750
C. 1000
D. 1250

56
Q

2-31: The use of copper as a structural material is limited by what factor?

A

A. Cost
B. Great weight
C. High heat conductivity
D. High electrical conductivity

57
Q

2-32: What is the principal element added to copper to form brass?

A

A. Tin
B. Lead
C. Zinc
D. Aluminum

58
Q

2-33: Which of the following extinguishing agents should be used on a magnesium fire?

A

A. Graphite powder
B. Carbon dioxide
C. Water
D. Foam

59
Q

2-34: How many different weights does a Rockwell hardness tester have?

A

A. One
B. Two
C. Three
D. Four

60
Q

2-35: Each Riehle harness tester is supplied with a diamond penetrator and what size, in inches, ball
penetrator?

A

A. 1/64
B. 1/32
C. 1/16
D. 1/8

61
Q

2-36: You can distinguish a plastic enclosure from a glass enclosure by performing which of the following actions?

A

A. Tapping lightly with a blunt instrument
B. Checking the ease with which it is drilled
C. Checking its reaction to acetone
D. Checking its reaction to hexane

62
Q

2-37: If long and improper storage has caused the adhesive to deteriorate on a sheet of plastic, the
masking paper should be moistened with what chemical?

A

A. Ether
B. Xylene
C. Glass cleaner
D. Aliphatic naphtha

63
Q

2-38: In various aircraft structural components, what materials are replacing and supplementing
metallic materials?

A

A. Rubber
B. Plastic
C. Sandwich
D. Composite

64
Q

*3. What multiengine aircraft structure is designed to transmit engine loads, stresses, and vibrations to the aircraft structure?
A. Fuselage
B. Landing gear
C. Nacelle
D. Tires

A

Nacelle

65
Q

*4. A rudder is designed to move an aircraft about what axis?
A. Lateral
B. Longitudinal
C. Horizontal
D. Vertical

A

Vertical

66
Q

*5. What secondary flight controls are small airfoils recessed in the trailing edge of a primary control surface?
A. Slats
B. Spoilers
C. Trim tabs
D. Wing flaps

A

Trim tabs

67
Q

*6. What secondary flight control on some aircraft are long, narrow surfaces hinged at their leading edge to the upper wing skin?
A. Slats
B. Spoilers
C. Trim tabs
D. Wing flaps

A

Spoilers

68
Q

*7. During strut compression, fluid passes through an orifice into what chamber of a shock strut?
A. Aft
B. Upper
C. Lower
D. Forward

A

Upper

69
Q

*8. How does the shimmy damper on a nose landing gear assembly prevent the nosewheel from shimmying during takeoff and landing?
A. By actuating a low-rate gear train
B. By forcing a rotary bar to move against a friction plate
C. By accentuating sudden torque loads applied to the nosewheel
D. By metering hydraulic fluid through a small orifice between two cylinders or chambers

A

By metering hydraulic fluid through a small orifice between two cylinders or chambers

70
Q

*9. The droop stops of an H-53 main rotor assembly are released when the main rotor speed reaches what percent of power?
A. 25
B. 50
C. 75
D. 90

A

75

71
Q

*10.The leading edge of an H-53 tail rotor assembly is protected by what type of abrasion strip?
A. Nickel
B. Copper
C. Titanium
D. Magnesium

A

Nickel

72
Q

*11. What type of stress is produced by two forces pulling in opposite directions along the same straight line?

A

Tension

73
Q

*12. What force is the opposite of tension?
A. Shear
B. Tension
C. Torsional
D. Compression

A

Compression

74
Q

*13. What type of stress is a combination of tension and compression?
A. Shear
B. Bending
C. Torsional
D. Stretching

A

Bending

75
Q

*14. What is the most widely used metal in modern aircraft construction?
A. Aluminum alloy
B. Brass
C. Titanium
D. Steel

A

Aluminum alloy

76
Q

*15. What structural metal is lightweight, strong, and corrosion resistant?
A. Nickel
B. Titanium
C. Aluminum
D. Magnesium

A

Titanium

77
Q

*16. At what temperature, in degrees Fahrenheit, does transparent plastic become soft and
pliable?
A. 32
B. 115
C. 225
D. 325

A

225

78
Q

*17. The strength of all metals is closely related to what other property?
A. Hardness
B. Denseness
C. Brittleness
D. Conductivity

A

Hardness

79
Q

*18. What metal property allows a metal to be hammered, rolled, or pressed into various shapes without cracking or breaking?
A. Ductility
B. Elasticity
C. Brittleness
D. Malleability

A

Malleability

80
Q

*19. At what temperature, in degrees Fahrenheit, does aluminum alloy become a liquid form?
A. 1,000
B. 1,110
C. 1,120
D. 1,130

A

1,100

81
Q

*20. What term is defined as the eating away or pitting of the surface or the internal structure of
a metal?
A. Corrosion
B. Exfoliation
C. Anodizing
D. Intergranular

A

Corrosion

82
Q

*21. What property allows two metals to be welded, brazed, or soldered?
A. Weight
B. Joining
C. Strength
D. Working

A

Joining

83
Q

*22. The intermediate shape of steel that has width greater than twice the thickness and from
which sheets are rolled is known by what name?
A. Slab
B. Ingot
C. Billet
D. Bloom

A

Slab

Navy Airframes (29 decks)

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