FAA Questions Test 1 Sheet Metals / Misc.

A well-designed rivet joint will subject the rivets to

shear loads

A main difference between Lockbolt/Huckbolt tension and shear fasteners (other than their application) is in the

number of locking collar grooves

Alloy 2117 rivets are heat treated

by the manufacturer and do not require heat treatment before being driven

The general rule for finding the proper rivet diameter is

three times the thickness of the thickest sheet

The shop head of a rivet should be

one and one-half times the diameter of the rivet shank

One of the main advantages of Hi-Lok type fasteners over earlier generations is that

they can be installed with ordinary hand tools

The markings on the head of a Dzus fastener identify the

body diameter, type of head, and length of the fastener.

The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud length is measured in

hundredths of an inch

The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud diameter is measured in

sixteenths of an inch.

Threaded rivets (Rivnuts) are commonly used to

attach parts or components with screws to sheet metal

The installation of Cherrymax and Olympic-Lok rivets is accomplished by utilizing

a pulling tool.

Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the

possibility of causing delamination

Select the alternative which best describes the function of the flute section of a twist drill

Forms the cutting edges of the drill point.

What should be the included angle of a twist drill for soft metals?

90 degrees

When comparing the machining techniques for stainless steel sheet material to those for aluminum alloy sheet, it is normally considered good practice to drill the stainless steel at a

lower speed with more pressure applied to the drill.

When drilling stainless steel, the drill used should have an included angle of

140° and turn at a low speed

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.

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.

Which procedure is correct when using a reamer to finish a drilled hole to the correct size?

turn the reamer only in the cutting direction

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

118 degrees

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.

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

specific alloy used in the manufacture of the rivets.

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

by the cold working of the rivet metal in forming a shop head.

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

To retard age hardening

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

low strength characteristics

A rivet set used to drive MS20470 rivets should

have a slightly greater radius than the rivet head.

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

must be reheat treated before use

The dimensions of an MS20430AD-4-8 rivet are

4/16 inch in diameter and 8/32 inch long.

Which of these is not true regarding the proper use of the drill press?

leave the key in the chuck when you are done so the next person can find it easily.

When drilling large holes in metal, it is often wise to drill a smaller hole first. This hole is called a

pilot hole

In this class we will use numbered bits, and occasionally fractional bits. How do lettered bits compare to numbered bits?

They are similar, but larger.

Which of these tools can produce compound bends in parts?

slip roller

How does a mechanic usually repair a section of compound curved fuselage skin?

They use an English Wheel

What tool is best used to bend angled parts into curves?

shrinker/Stretcher

When fastening two thin sheets together, which of these should be used?

Dimple the upper and lower sheets, and drive the rivet.

When fastening a thin sheet to the top of a thick sheet, which of these should be used?

Dimple the upper sheet, and countersink the lower sheet. Then drive the rivet.