Ch2 A&b&c

Front 1

The type of metal most often used in the construction of civilian aircraft is heat treated ___ alloy

Back 1

Aluminum

Front 2

Two basic types of sheet metal structure used for aircraft are:

Back 2

Monocoque and semimonocoque

Front 3

A repair to an aircraft structure must restore its original:

Back 3

Strength, stiffness and shape

Front 4

The five basic stresses encountered by an aircraft structure are:

Back 4

Tension

Compression

Torsion

Bending

Shear

Front 5

The top of a wing spar, in flight, is subjected to a ___ stress

Back 5

Compressive

Front 6

The bottom of a wing spar, in flight, is subjected to a ___ stress

Back 6

Tensile

Front 7

A torsional stress is made up of ___ and ___ acting perpendicular to each other

Back 7

Compression and tension

Front 8

a properly designed rivet joint is subjected to what types of stresses or loads?

Back 8

Tensile and Shear

Front 9

If a properly designed rivet joint fails, the rivet first will ___.

Back 9

Shear

Front 10

Aircraft structures are most likely to fail at points where stresses ___ due to abrupt changes in ___

Back 10

Concentrate, cross-sectional area.

Front 11

To prevent a small crack from extending, you may ___-___ it's end.

Back 11

Stop-drill

Front 12

Aluminum alloys ___ susceptible to corrosion

Back 12

Are

Front 13

2117

Back 13

Copper

Front 14

2024

Back 14

Copper

Front 15

5056

Back 15

Magnesium

Front 16

7075

Back 16

Zinc

Front 17

Commercially pure aluminum is identified by the number ___

Back 17

1XXX

Front 18

Most of aluminum alloy used for aircraft structure is alloy number ___

Back 18

2024

Front 19

Alclad is ___, that is ___ onto the surface of heat treated aluminum alloys

Back 19

Pure aluminum, rolled

Front 20

In order to protect the alloy within an alclad sheet and to prevent creation of potential stress points, the surface of aircraft sheet metal should be protected from ___ and ___

Back 20

Scratches and abrasions

Front 21

When aluminum alloy is heated to its critical temperature and quenched, it is ___ heat-treated

Back 21

Solution

Front 22

Artificial aging is another name for ___ heat treatment

Back 22

Precipitation

Front 23

Aluminum Alloys may be ___ by annealing

Back 23

Softened

Front 24

As fabricated

Back 24

- F

Front 25

Annealed

Back 25

-O

Front 26

Solution heat treated

Back 26

T4

Front 27

Solution heat treated and cold worked

Back 27

T3

Front 28

Solution heat treated and artificially aged

Back 28

T6

Front 29

Strain Hardened to quarter hard temper

Back 29

H12

Front 30

Strain Hardened to full hard temper

Back 30

H18

Front 31

Magnesium is ___ than aluminum

Back 31

Lighter

Front 32

Three drawbacks to the use of magnesium as a structural material are:

Back 32

Cracks easily

corrodes easily

Burns readily

Front 33

Titanium is used in structural areas of jet transports where a high __ to __ ratio is required

Back 33

Strength to weight

Front 34

Because of its strength and resistance to corrosion, stainless steel is well suited for ___ temperature applications such as:

Back 34

High

Firewalls

Exhaust systems

Front 35

Aluminum alloy faced honeycomb panels are useful as a structural material because of their:

Back 35

High strength

Light weight

Stiffness

Front 36

Three methods of Corrosion Prevention used on aluminum Alloys are:

Back 36

1. An area of electrode potential difference

2. Covering with an impenetrable oxide film

3. Covering with primer and paint

Front 37

Three requirements for the formation of corrosion on aluminum alloy are:

Back 37

1 an area of electrode potential difference

2 a conductive pass between these areas

3 an electrolyte covering the surface

Front 38

When using a scale for Sheet Metal layout, you ___ measure from its end

Back 38

Should not

Front 39

Scribes ___ be used to mark bend lines because ________.

Back 39

Should not

The part will crack when it's bent

Front 40

If a lead pencil is used to make marks on turbine engine hot section parts or reciprocating engine exhaust systems, what can happen?

Back 40

Carbon infuses into the metal

Front 41

Felt marking pens ___ widely used for sheet metal layout.

Back 41

Are

Front 42

A ___ punch is used to locate the center of a rivet hole when using the old skin as a pattern for a new one

Back 42

Transfer

Front 43

A ___ punch is commonly used to remove rivets

Back 43

Pin

Front 44

A ___ is a power or hand tool that is very useful for making detailed inside cuts

Back 44

Nibbler

Front 45

Aviation snips

Cuts right

Back 45

Green

Front 46

Aviation snips Cuts left

Back 46

Red

Front 47

Aviation snipsCuts straight

Back 47

Yellow

Front 48

When using a deburring tool, avoid using too much pressure to prevent the hole from becoming ___

Back 48

Countersunk

Front 49

The most commonly used shop tool for cutting sheet metal work is the ___

Back 49

Squaring sheer

Front 50

Three main parts of a twist drill

Back 50

Tip body and shank

Front 51

A number ___ drill is used to cut holes for the 1/8 diameter rivets

Back 51

30

Front 52

The ___ break is the most widely used bending machine in aircraft maintenance shops

Back 52

Box

Front 53

What color to identify cleco fasteners

3/32 inch

Back 53

Silver

Front 54

What color to identify cleco fasteners

1/8 inch

Back 54

Copper

Front 55

What color to identify cleco fasteners

5/32 inch

Back 55

Black

Front 56

What color to identify cleco fasteners

3/16 inch

Back 56

Brass

Front 57

A ___ is used for finding the location of the new rivet holes when joining undrilled sheet metal skins over previously drilled skins

Back 57

Hole finder

Front 58

A ___ is used to remove unwanted metal chips produced by drilling from between metal sheets

Back 58

Chip chaser

Front 59

Rivet length is measured in increments of ___-inch and rivet diameter are measured in increments of ___-inch

Back 59

1/16inch and 1/32inch

Front 60

Identify the head shape of each of these all aluminum alloy rivets

AN426 (MS20426)

Back 60

Countersunk

Front 61

Identify the head shape of each of these all aluminum alloy rivets

AN470 (MS20470)

Back 61

Universal

Front 62

Identify the head shape of each of these all aluminum alloy rivets

AN430

Back 62

Round

Front 63

Identify the head shape of each of these all aluminum alloy rivets

AN442

Back 63

Flat

Front 64

Prior to installing in AN426 rivet, the metal must be ___ or ___

Back 64

Countersunk or dimpled

Front 65

Identify the alloy used in solid aluminum rivets having these head identification characteristics

No mark

Back 65

1100

Front 66

Identify the alloy used in solid aluminum rivets having these head identification characteristics

Dimple

Back 66

2117

Front 67

Identify the alloy used in solid aluminum rivets having these head identification characteristics

Teat or raised dot

Back 67

2017

Front 68

Identify the alloy used in solid aluminum rivets having these head identification characteristics

Raised dashes

Back 68

2024

Front 69

Identify the alloy used in solid aluminum rivets having these head identification characteristics

Raised cross

Back 69

5056

Front 70

Give the alloy number used for rivets identified by the following code letters

A

Back 70

1100

Front 71

Give the alloy number used for rivets identified by the following code letters

B

Back 71

5056

Front 72

Give the alloy number used for rivets identified by the following code letters

AD

Back 72

2117

Front 73

Give the alloy number used for rivets identified by the following code letters

D

Back 73

2017

Front 74

Give the alloy number used for rivets identified by the following code letters

DD

Back 74

2024

Front 75

Give the alloy number used for rivets identified by the following code letters

E

Back 75

7050

Front 76

Magnesium skin should be Riveted using a rivet identified by the code letter ___

Back 76

B

Front 77

2017 aluminum our way rivets, identify by the code letter D must be ___ before they can be driven. To maintain them in and Daniel condition, they are Quint and immediately stored in a freezer. Or this reason they are commonly called ___ rivets

Back 77

Heated

Icebox

Front 78

Rivets that can be installed without access to both ends are called ___ rivets

Back 78

Blind

Front 79

A(n) ____ is a special type of rivet that leaves a threaded hole for a machine screw after installation

Back 79

Rivnut

Front 80

Three commonly used turn-lock fasteners used on cowlings, access panels, etc, are referred to buy their trade names, and are called ____, ____, and ____ fasteners.

Back 80

Dzus, airloc and camlock

Front 81

A ___ saw is a portable circular metal cutting saw that can cut out damaged sections of sheet metal

Back 81

Kett

Front 82

___ are cutting tools that rough cut small holes and skins, radio chassis, and instrument panels

Back 82

Nibblers

Front 83

On a properly driven rivet, the width of the Bucked head must be ___ times the original shank diameter and the height must be ___ times the original shank diameter.

Back 83

1.5

.5

Front 84

For a rivet joint to develop its required strength, no rivet should be installed with its center nearer to the edge of a sheet than ___ rivet diameters

Back 84

Two

Front 85

Adjacent rivets in a row should be no closer than ___ diameters, and no further apart than ___ to ___ diameters of the rivet shank.

Back 85

Three diameters

Ten to twelve diameters

Front 86

The distance between rows of staggered rivets should be ___ of the distance between rivets in a given row.

Back 86

75%

Front 87

What size twist drill for these rivet sizes?

3/32

Back 87

#40

Front 88

What size twist drill for these rivet sizes?

1/8

Back 88

#30

Front 89

What size twist drill for these rivet sizes?

5/32

Back 89

#21

Front 90

What size twist drill for these rivet sizes?

3/16

Back 90

#11

Front 91

The head angle of an MS20426 is ___ degrees

Back 91

100

Front 92

When three sheets of metal are dimpled and stacked to be Riveted together, they should be ___ dimpled

Back 92

Coin

Front 93

What type of dimpling is used on magnesium sheets to prevent them from cracking in the dimpling process? ___ dimpling

Back 93

Hot

Front 94

An AN470DD6 rivet would be most properly driven with a ___ rivet gun

Back 94

One-shot

Front 95

When installing rivets according to the NACA method, the manufactured head is placed on the ___ of the structure.

Back 95

Inside

Front 96

Tapping code

Bad rivet

Back 96

3 taps

Front 97

Tapping code

Good rivet

Back 97

Two taps

Front 98

Tapping code

Drive the rivet some more

Back 98

One tap

Front 99

When practical, bends should be made ___ the grain of the metal

Back 99

Across

Front 100

The point of intersection of the mold lines of two sides of a bend is called the ___ point

Back 100

Mold

Front 101

The distance from the mold point to the bend tangent line is known as the ___

Back 101

Setback

Front 102

For a bend of 90 degrees, the setback is calculated using the formula known as a ___ or ___ factor to find the setback

Back 102

K-value or k-factor

Front 103

For a bend of 90 degrees, the setback is calculated using the formula: Setback= __ + __

Back 103

BR (bend radius) + MT (metal thickness)

Front 104

The formula used to determine setback of an angle other than 90 degrees is

Setback = ____

Back 104

K (R+T)

Front 105

The amount of material actually involved in the bend is known as the ____

Back 105

Bend allowance

Front 106

The amount of material actually involved in the bend is known as the ____

Back 106

Bend allowance

Front 107

When bending a bulb angle into a convex curve, the flange of the metal with the bulb must be ___

Back 107

Stretched

Front 108

If a piece of metal becomes too hard when it is being bumped into a compound curve, it ___ be annealed to soften it.

Back 108

May

Front 109

What is done to lightening holes in a wing rib to add stiffness? They may be ___

Back 109

Flanged

Front 110

In order for sheet metal pieces to be flat against the skin and yet have one flat on top of another, a process called ___ is used.

Back 110

Joggling