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BSAeE 3-2 > AMCR MIDTERMS > Flashcards

AMCR MIDTERMS Flashcards

1
Q

The most common technique of joining sheets of
aluminum is this. A _____ is a metal pin with a formed head on one end. A
_____ is inserted into a drilled hole, and its shank is then deformed by a hand or
pneumatic tool. ____ create a union at least as strong as the material being
joined.

A

Rivets

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2
Q

It has been used since sheet metal was first utilized in
aircraft and remains the single most used aircraft fastener today.

A

Solid Shank Rivet

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3
Q

When a rivet is driven, its cross-sectional area _____ along with its
bearing and shearing strengths.

A

increases

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4
Q

Rivet Codes that are used today

A

Air Force - Navy, or AN system,
and the Military Standards 20 system, or MS20.

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5
Q

The two most common rivet head styles

A

Universal head and Countersunk

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6
Q

What is the code of the universal head

A

470

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7
Q

What is the code of countersunk

A

426

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8
Q

These were developed to streamline airfoils and permit a
smooth flow over an aircraft’s wings or control surfaces.

A

AN426 (countersunk rivets)

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9
Q

before a
countersunk rivet can be installed, the metal must be ________

A

countersunk or dimpled

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10
Q

It is a process in which the metal in the top sheet is cut away in the
shape of the rivet head.

A

Countersinking

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11
Q

It is a process that
mechanically “dents” the sheets being joined to accommodate the rivet head.

A

Dimpling

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12
Q

Rivet Code of a universal head

A

AN470 - MS20470

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13
Q

Rivet Code of a flat head

A

AN442

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14
Q

Rivet Code of a roundhead

A

AN430

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15
Q

Rivet Code of a Brazier Head

A

AN455

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16
Q

To provide a smooth finish after
the rivet is driven, the protruding rivet head is removed using a ____ . This
rotary cutter shaves the rivet head flush with the skin, leaving an aerodynamically
clean surface.

A

Microshaver

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17
Q

An alternative to leaving the rivet head sticking up slightly is to use the _________.

A

Alcoa crown flush rivet

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18
Q

the amount of force that is
needed to cut a rivet into two

A

Shear Strength

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19
Q

the amount of force that will
cause the rivet to tear out from the metal

A

Bearing Strength

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20
Q

Rivets made of pure aluminum have no identifying marks on their manufactured head
and are designated by the letter A in the rivet code.

A

1100 Aluminum (Rivet Code: A)

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21
Q

is the most widely used for manufacturing and maintenance of
modern aircraft. Rivets made of this alloy have a dimple in the center of the head and
are represented by the letters AD in rivet part codes. Because AD rivets are so common
and require no heat treatment, they are often referred to as “field rivets.”

A

2117 Aluminum Alloy (AD) or 2117-T3

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22
Q

Some aircraft parts are made of magnesium. If aluminum rivets were used on these
parts, dissimilar metal corrosion could result. For this reason, magnesium structures
are riveted with 5056 rivets which contain about 5 percent magnesium. These rivets
are identified by a raised cross on their heads and the letter B in a rivet code.

A

5056 Aluminum Alloy (B)

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23
Q

the aluminum industry modified 2017 alloy to produce a new version of 2017 aluminum,
called the _________.

A

crack free rivet alloy

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24
Q

are identified by a raised dot in the center of their head and the letter D in rivet
codes. Because D-rivets are so hard they must be heat treated before they can be used.

A

2017 Aluminum Alloy (D)

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25
Q

are identified by two raised dashes on their head.

A

DD-Rivets / 2024 Aluminum Alloy (DD)

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26
Q

This alloy contains zinc as the major alloying ingredient and is precipitation heat-treated.
This alloy is used by the Boeing Airplane Company as a replacement for 2024T31 rivets
in the manufacture of the 767 widebody aircraft.

A

7050-T73 Aluminum Alloy (E)

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27
Q

Stainless steel rivets are used for fastening corrosion-resistant steel sheets in
applications such as firewalls and exhaust shrouds. They have no marking on their
heads.

A

Corrosion Resistant Steel (F)

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28
Q

This rivets are identified with two recessed dimples in their heads. They are used in
place of corrosion-resistant steel rivets when their somewhat lower shear strength is
not a detriment.

A

Monel (M)

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29
Q

used for fastening
steel and titanium alloy.

A

Titanium (T)

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30
Q

AMS

A

Aeronautical Material Specifications

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31
Q

AN

A

Air Force-Navy

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32
Q

AND

A

Air Force-Navy Design

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33
Q

AS

A

Aeronautical Standard

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34
Q

ASA

A

American Standards Association

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35
Q

ASTM

A

American Society for Testing and Materials

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36
Q

MS

A

Military Standard

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37
Q

NAF

A

Naval Aircraft Factory

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38
Q

NAS

A

National Aerospace Standard

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39
Q

SAE

A

Society of Automotive Engineers

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40
Q

These rivets are installed with
access to only one end of the rivet.

A

Special Rivets or Blind Rivets

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41
Q

These rivets have limited use on aircraft and are never used for structural repairs. Useful for temporarily lining
up holes; used in some homebuilt aircraft

A

Pop Rivets

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42
Q

develop the maximum strength from the sheet metal
as determined by the amount of load that the sheet
metal must carry.

A

Rivet Layout Pattern

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43
Q

metal sheet will tear out in extreme conditions

A

If it’s too close to the edge

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44
Q

metal sheet separates; contaminants enter the join

causing corrosion for instance.

A

If it’s too far from the edge

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45
Q

no closer than _____ rivet shank diameters from
the edge and no further back than _____ diameters

A

2, 4

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46
Q

the distance between adjacent rivets in a row.

A

Rivet Pitch

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47
Q

Accepted Practice in Rivet Pitch

A

3D-12D

48
Q

the distance between rows of rivets in a
multi-row layout.

A

Transverse Pitch

49
Q

Accepted practice in Transverse Pitch

A

75% RP, if staggered

RP=TP, if not staggered

50
Q

safer to use; less chances of electric
shock and arcing; motor speed is controlled by varying
trigger pressure.

A

Pneumatic Drills

51
Q

what type of dimpling that uses a forging action

A

Coin Dimpling

52
Q

what type of dimpling that uses a folding action

A

Radius Dimpling

53
Q

Two types of Dimpling

A

Double-Dimple, Dimple-Countersunk

54
Q

When installing rivets, it is important to install the
rivet with as _________ as possible so the materials
will not work-harden and crack.

A

few impacts

55
Q

3 Types of Rivet Installation

A

Hand Riveting, Compression Riveting, Gun Riveting

56
Q

radius of depression in the set
must be larger than that of the rivet head, but
not so large that the edges of the set contract
the surface of the metal.

A

Rivet Set

57
Q

When a rivet is driven,
the actual compression of the rivet is
not performed by the action of the
rivet gun, instead, the rivet is backed
up by a metal bar that reciprocates in
response to the beats of the rivet gun.

A

Bucking Bar

58
Q

early form of
blind rivet. It cannot replace solid
shank rivets size for size and must be
at least one size larger in diameter.
Center stem is one of its drawback

A

Cherry friction-lock rivet

59
Q

designed to prevent the
center stem of a rivet from falling out via lock ring as a
result of vibration encountered during aircraft operation

A

Mechanical Lock Rivets

60
Q

first mechanical lock rivet; limited to
aircraft manufacturers and large repair facility

A

Huck-Lock

61
Q

requires a special pulling tool
per size and head shape.

A

bulbed CherryLOCK

62
Q

lightweight, spindle-type blind rivet;
less expensive, only 3 installation tools are required

A

Olympic-Lok

63
Q

economical and replaces solid shank
rivets size for size; installed by a one size puller for
all sizes.

A

CherryMAX

64
Q

4 types of mechlocktype rivets

A

Huck-Lock, Bulbed CherryLOCK, OlympicLOK, CherryMAX

65
Q

high strength and light weight fastener that can be used
in place of conventional AN bolts and nuts. Held in place
by a collar, squeezed into position instead of being
screwed on like a nut.

A

Special Fasteners

66
Q

for both shear and tension applications

A

Lock Bolts

67
Q

withstand bearing and shearing loads

A

Hi-Lok Bolts

68
Q

excellent strength to weight ratio;
lighter

A

Hi Lite Fastener

69
Q

one piece fastener made of 2 titanium
alloys

A

CherryBuck

70
Q

strongest; creates radial and vertical
compression

A

TaperLok

71
Q

has a bead at the threaded end;
preloads the hole to strengthen the joint

A

Hi Tigue Fastener

72
Q

threaded rivets; attach rubber
deicer boots to aircraft wing and tail surfaces

A

Rivnuts

73
Q

secure inspection
plates, doors cowlings and other removable
panels on aircraft.

Ex. Dzus Fastener

A

Turn-lock Fasteners

74
Q

unlike rivets and pins, these may be
disassembled and reassembled an almost infinite
number of times.

A

Threaded Fasteners

75
Q

4 classifications of threads

A

American National Coarse (NC)
American National Fine (NF)
American Standard Unified Coarse (UNC)
American Standard Unified Fine (UNF)

76
Q

designated by the number of times the incline
(threads) rotates around a _____ inch length of given
diameter bolt or screw. (Thread Designation)

A

1

77
Q

Class 1

A

loose fit – fingers only – wing nuts

78
Q

Class 2

A

free fit - screws

79
Q

Class 3

A

medium fit – aircraft bolts

80
Q

Class 4

A

close fit – requires wrench

81
Q

Class 5

A

tight fit - requires wrench

82
Q

The hole is larger than the shaft, enabling the
two parts to slide and / or rotate when assembled.

A

Clearance Fit

83
Q

The hole is fractionally smaller than the shaft
and mild force is required to assemble / disassemble

A

Transition Fit

84
Q

The hole is smaller than the shaft and high
force and / or heat is required to assemble / disassemble

A

Interference Fit

85
Q

Fastener Diameter

A

1/16 inch increment

86
Q

Fastener Length

A

1/8 inch increment (1/8 – 7/8 only)

87
Q

Letter “H” after the number indicating the diameter

A

drilled head

88
Q

Letter “A” after the dash number

A

undrilled shank

89
Q

Why head is drilled

A

for safetying

90
Q

AN73 to AN81

similar to the standard hex bolt, but has a deeper
head that is drilled to receive wire for safetying.

Letter “A” before the dash number – coarse threaded

A

Drilled Head Bolt

91
Q

AN173 to AN186 – Hex head

NAS80 to NAS86 – Countersunk head

Identified by a cross or asterisk inside a triangle
used in areas that are subject to pounding loads
or in a structure that is required to be both riveted
and bolted.

A

Close Tolerance Bolt

92
Q

AN21 to AN36

Domed head that is either
slotted or recessed; mostly
safetied with a cotter pin

Shorter threaded shank, thus
longer grip length

Both diameter and length are
measured in 1/16 in increment
applications requiring shear
loads only; control cables

A

Clevis Bolts

93
Q

A sort of locking device is a must to prevent nuts from
loosening and falling off.

A

Aircraft Nuts

94
Q

two basic types of nuts

A

self locking nuts, non self locking nuts

95
Q

locks onto a bolt on its own

A

self locking nuts

96
Q

relies on either a cotter pin, check
nut, or lock washer to hold it in place.

A

non self locking nuts

97
Q

Code of Castle Nut

A

AN310

98
Q

Code of Shear Castle Nut

A

AN320

99
Q

Code of Plain Nut

A

AN315

100
Q

2 types of self locking nuts

A

Fiber or Nylon Type / All metal type

101
Q

3 types of other aircraft nuts

A

Wing Nut, Anchor Nut, Tinnerman Nut

102
Q

made of lower strength materials compared to bolts
loose-fitting thread; class 2 fit

head shapes are made to engage a screwdriver or wrench

A

Aircraft Screws

103
Q

3 Basic Classification of aircraft screws

A

Machine Screw, Self tapping screw, Structural Screw

104
Q

used in shear applications and for safetying

A

Aircraft Pins

105
Q

4 types of aircraft pins

A

Roll, Clevis, Cotter, Taper

106
Q

provide a bearing surface area for nuts
act as spacers

shims to obtain the proper grip length
for a bolt and nut assembly

A

Aircraft Washers

107
Q

strong and light weight, and its flexibility makes it easy to route.

actuate flight controls, engine controls, emergency landing gear
extension controls and trim tab systems.

A

Aircraft Control Cables

108
Q

develop 75% of
the cable strength

Ex. Army-Navy 5 tuck splice /
Roebling roll

A

Woven Splices

109
Q

used most in
large aircraft manufacture. At
least as strong as the cable

A

Swaged Terminals

110
Q

squeezed onto control cables
to form terminal ends, and place AN100 thimble
inside the loop. At least the same strength of the
cable.

A

Nicopress Sleeves

111
Q

allows cable tension to be adjusted.by
rotating it.

A

Turnbuckle

112
Q

prevents cable contact to other parts of
the aircraft

A

Fairlead

113
Q

changes direction of travel

A

Pulley

114
Q

changes motion through an angle;
Ex. rudder mechanism

A

Bellcrank

115
Q
A

BSAeE 3-2 (32 decks)

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