Aim Block 5 Final Study Guide

Front 1

The aluminum Alloys used in aircraft construction are usually hardened by which method?

Back 1

Heat Treatment

Front 2

On a sheet metal fitting layout with a single bend, allow for stretching by

Back 2

Subtracting the setback from both legs.

Front 3

The sight line on a sheet metal flat layout to be bent in a cornice or box brake is measured and marked

Back 3

One radius from the bend tangent line that is placed under the brake

Front 4

When bending metal, the material on the outside of the curve stretches while the material on the inside of the curve compresses. That part of the material which is not affected by either stress is the

Back 4

Neutral line

Front 5

The purpose of a joggle is to

Back 5

Allow clearance for a sheet or an extension

Front 6

You can distinguish between aluminum and aluminum Alloys by

Back 6

Testing with a 10% solution of caustic soda

Front 7

A piece of sheet metal is bent to a certain radius. The curvature of the bend is referred to as the

Back 7

Bend radius

Front 8

The most important factors needed to make a flat pattern layout are

Back 8

Radius, thickness, and degree of bend.

Front 9

The sharpest bend that can be placed in a piece of metal without criticality weakening the part is called the

Back 9

Minimum radius of bend

Front 10

Unless otherwise specified, the radius of a bend is the

Back 10

Inside radius of the metal being formed.

Front 11

If it is necessary to compute a bend allowance problem and bend allowance tables are not available, the neutral axis of the bend can be

Back 11

Found by adding approximately one-half of the stock thickness to the bend radius.

Front 12

The flat layout or blank length of a piece of metal from which a simple L-shaped bracket 3 inches by 1 inch is to be bent depends upon the radius of the desired bend. The bracket which will require the greatest amount of material is one which has a bend radius of

Back 12

1/8 inch

Front 13

When a piece of aluminum alloy is to be bent using a minimum radius for the type and thickness of material,

Back 13

The layout should be made so that the bend will be 90° to the grain of the sheet

Front 14

If a streamline cover plate is to be hand formed using a form block, a piece of dead soft aluminum should first be placed over the hollow portion of the mold and securely fastened in place. The bumping operation should be

Back 14

Started by tapping the aluminum lightly around the edges and gradually working down into the center.

Front 15

A piece of flat stock that is to be bent to a closed angle of 15° must be bent through an angle of

Back 15

165°

Front 16

The length of rivet to be chosen when making a structural repair that involves the joining of 0.032-inch and 0.064-inch aluminum sheet, drilled with a No. 30 drill, is

Back 16

5/16 inch

Front 17

Which rivet is used for riveting nickel-steel Alloys?

Back 17

Monel

Front 18

Which rivet is used for riveting magnesium alloy structures?

Back 18

5056 aluminum

Front 19

What type loads cause the most rivet failures?

Back 19

Shear

Front 20

Joggles in removed rivet shanks would indicate partial

Back 20

Shear failure

Front 21

What is generally the best procedure to use when removing a solid shank rivet?

Back 21

Drill to the base of the manufactured rivet head with a drill one size smaller than the rivet shank and remove the rivet with a punch.

Front 22

The length of a rivet to be used to join a sheet of .032-inch and .064-inch aluminum alloy should be equal to

Back 22

One and one-half times the rivet diameter plus .096 inch.

Front 23

When riveting dissimilar metals together, what precautions must be taken to prevent an electrolytic action?

Back 23

Place a protective separator between areas of potential electrical difference.

Front 24

A DD rivet is heat treated before use to

Back 24

Soften to facilitate riveting.

Front 25

Mild steel rivets are used for riveting

Back 25

Steel parts.

Front 26

A sheet metal repair is to be made using two pieces 0.0625-inch aluminum riveted together. All rivet holes are drilled for 1/8-inch rivets. The length of the rivets to be used will be

Back 26

5/16-inch

Front 27

Which rivets should be selected to join two sheets of 0.032-inch aluminum?

Back 27

MS20470AD-4-4

Front 28

Which rivet may be used as recieved without further treatment?

Back 28

2117-T3

Front 29

MS20426AD-6-5 indicates a countersunk rivet which has

Back 29

An overall length of 5/16-inch.

Front 30

Most rivets used in aircraft construction have

Back 30

Dimples

Front 31

A sheet metal repair is to be made using two pieces of 0.040-inch aluminum riveted together. All rivet holes are drilled for 3/32-inch rivets. The length of the rivets to be used will be

Back 31

1/4-inch.

Front 32

Which part of the 2017-T36 aluminum alloy designation indicates the primary alloying agent in its manufacture?

Back 32

2

Front 33

The primary alloying agent of 2024-T3 is indicated by the number

Back 33

2

Front 34

The dimensions of an MS20430AD-4-8 rivet are

Back 34

1/8-inch in diameter and 1/2-inch long.

Front 35

Heat-treated rivets in the D and DD series that are not driven within the prescribed time after heat treatment or removal from refrigeration

Back 35

Must be reheat treated before use.

Front 36

A rivet set used to drive MS20470 rivets should

Back 36

Have a slightly greater radius than the rivet head.

Front 37

Under certain conditions, type A rivets are not used because of their

Back 37

Low strength characteristics.

Front 38

What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment?

Back 38

To retard age hardening.

Front 39

Which of the following need not be considered when determining minimum rivet spacing?

Back 39

Rivet length.

Front 40

When MS20470D rivet is installed, it's full Shear strength is obtained

Back 40

Only after a period of age hardening.

Front 41

The identifying marks on the heads of aluminum alloy rivets indicate the

Back 41

Specific alloy used in the manufacture of the rivets.

Front 42

What is indicated by a black 'smokey' residue streaming back from some of the rivets on an aircraft?

Back 42

Fretting corrosion is occurring between the rivets and the skin.

Front 43

Rivet pitch is the distance between the

Back 43

Center of the adjacent rivets in the same row.

Front 44

Rivet gauge, or transverse pitch is the distance between the

Back 44

Center of rivets in adjacent rows.

Front 45

Which part(s) of a semi-monocoque fuselage prevent(s) tension and compression from bending the fuselage?

Back 45

Longerons or stringers.

Front 46

The monocoque fuselage relies largely on the strength of

Back 46

Skin or covering.

Front 47

Parts fabricated from Alclad 2024-T3 aluminum sheet stock must have all

Back 47

Scratches, kinks, tool marks, nicks, etc., must be held to a minimum.

Front 48

What should be the included angle of a twist drill for hard metal?

Back 48

118°

Front 49

A factor that determines the minimum space between rivets is the

Back 49

Diameter of the rivets being used.

Front 50

Aircraft structural units, such as spars, engine supports, etc., which have been built up from sheet metal, are normally

Back 50

Repairable, using approved methods.