Sheet Metal Spartan Mod 13

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

1/4 inch

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

1/8 inch

The dimensions of an MS20430AD-4-8 rivet are

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

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

165

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

2

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

2

A sheet metal repair is to be made using two pieces of 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

5/16 inch

The length of rivet to be choosing 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

5/16 inch

Which rivet is used for riveting magnesium alloy structures

5056 aluminum

Which rivet is used for riveting nickel-steel alloys

monel

What type loads cause the most rivet failures

shear

Which rivets should be selected to join two sheets of .032 inch aluminum

MS20470AD-4-4

What is the minimum edge distance allowed for aluminum alloy single lap sheet splices containing a single row of rivets as compared to a joint with multiple rows, all rivets being equal in diameter

The minimum edge distance for the single row is equal to that for the multiple row.

The purpose of a joggle is to

allow clearance for a sheet or an extrusion

Which is correct concerning the use of a file

apply pressure on the forward stroke, only, except when Filing very soft metals such as lead or aluminum

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

bend radius

Shallow scratches in sheet metal may be repaired by

burnishing

Rivet pitch is the distance between the

centers of adjacent rivets in the same row

Rivet gauge or transverse pitch is the distance between the

centers of rivets in adjacent rows

Most rivets used in aircraft construction have

dimples

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

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

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

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

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

fretting corrosion is occurring between the rivets and the skin

A rivet set used to drive MS20470 rivets should

have a slightly greater radius than the rivet head

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

heat treatment

Unless otherwise specified, the radius of a bend is the

inside radius of the metal being formed

Which part(s) of 'a semi monoeoque fuselage prevent(s) tension and compression from bending the fuselage

longerons and stringers

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

low strength characteristics

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

minimum radius of' bend

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

must be reheat treated before reuse

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

neutral line

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

one and one halftimes the rivet diameter plus .096 inch

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

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

When an MS20470D rivet is installed, its full shear strength is obtained

only after a period of age hardening

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

place a protective separator between areas of potential electrical difference

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

radius, thickness, and degree of bend

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

rivet length

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

scratches, kinks, tool marks, nicks, etc., held to a minimum

Joggles in removed rivet shanks would indicate partial

shear failure

The monocoque fuselage relies largely on the strength of

skin or covering

A DD rivet is heat treated before use to

soften to facilitate riveting

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

specific alloy used in the manufacturer of the rivets

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 ofthe mold and securely fastened in place. The bumping operation should be

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

Mild steel rivets are used for riveting

steel parts

When straightening members made of 2024-T4, you should

straighten cold and reinforce

You can distinguish between aluminum and aluminum alloy by

testing with a 10 percent solution of caustic soda

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

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

When repairing a small hole on a metal stressed skin, the major consideration in the design of the patch should be

the shear strength of the riveted joint

What is one of the determining factors which permits machine countersinking when flush riveting

thickness of the material is greater than the thickness of the rivet head

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

to retard age hardening