Aviation Structural Mechanic (Chapter 04 - Metallic Repair)

Front 1

A soft-faced hammer is known by what name?

Back 1

Mallet.

Front 2

When rivets are too long for repair, you can size them to the correct length with what tool?

Back 2

Rotary rivet cutter.

Front 3

What must you use to form a bucktail on a rivet?

Back 3

Bucking bar.

Front 4

Locally manufactured bucking bars are normally made from what type of steel?

Back 4

Tool steel.

Front 5

To transfer hole locations from the airframe or skin to a patch, you should use what tool?

Back 5

Hole finder.

Front 6

What is the color of a 1/8-inch Cleco fastener?

Back 6

Copper.

Front 7

What is the difference between snips and shears?

Back 7

Normally, shears are used to cut heavier gauge metal.

Front 8

What rivet gun is generally used for heavy hitting, and under suitable conditions, is the fastest method of riveting?

Back 8

One-shot gun.

Front 9

What will happen if you apply too much pressure to the drill?

Back 9

It can cause the drill to side slip and the hole to be elongated.

Front 10

Most pneumatic drills are powered by what type of motor?

Back 10

Vane air.

Front 11

The combination of bending and stretching of metal, using male and female dies, forms what type of countersink?

Back 11

Dimple.

Front 12

A flexible shaft drill is also known by what other name?

Back 12

Snake drill.

Front 13

Why is it necessary to use a hot dimpling process for aluminum alloys?

Back 13

Aluminum alloys are subject to cracking when formed.

Front 14

Portable power-operated snips are more commonly referred to by what name?

Back 14

Unishears.

Front 15

What sheet metal equipment would you use to fabricate a wire edge?

Back 15

Bar folder.

Front 16

What brake has removable steel fingers of varying widths?

Back 16

Box and pan brake.

Front 17

What is the most commonly used layout fluid?

Back 17

Bluing fluid.

Front 18

What is the only thing you should use a scriber for when laying out aluminum or magnesium?

Back 18

To indicate where the metal is to be cut or drilled.

Front 19

The amount of material consumed in the bending process is known by what term?

Back 19

Bend allowance.

Front 20

What is the outside dimension of the formed part called?

Back 20

Base measurement.

Front 21

The setback is the combination of the metal thickness and what other factor?

Back 21

Radius.

Front 22

Machines used to cut sheet metal are classified into what two groups?

Back 22

Power and manual operated.

Front 23

When using a vise and forming blocks to manually form a part, what are the three materials that the mallet you use must be made from?

Back 23

Rubber, plastic, or rawhide.

Front 24

When you cut sheet metal, how much should you add to allow for trim?

Back 24

1/4 in.

Front 25

Before making any bends on the layout, what should you do to make sure the brake settings are right?

Back 25

Use a piece of scrap metal.

Front 26

How many adjustments must be checked on the bar folder before you can properly bend and fold metal?

Back 26

Two.

Front 27

To form cylindrical or conical shapes, you should use what machine?

Back 27

Slip-roll forming machine.

Front 28

What machine should you use to make a groove on a bucket?

Back 28

Beading rolls.

Front 29

What determines the minimum rivet diameter?

Back 29

The thickness of the metal being riveted.

Front 30

What is the Navy standard countersink angle?

Back 30

100°.

Front 31

A CP350 blind rivet tool is used to pull what type of rivet?

Back 31

Huch rivet.

Front 32

When drilling out a self-plugging rivet, what size drill bit would you use to drill a 1/8- inch rivet?

Back 32

No. 31 drill bit.

Front 33

After cleaning the damaged area of an aircraft, what is the next step in the repair
process?

Back 33

Inspect for secondary damage.

Front 34

What kind of damage can turn into permanent damage if not properly treated?

Back 34

Corrosion damage.

Front 35

Damage caused by tools, bolts, rivets, and nuts left adrift is known as what type of damage?

Back 35

Foreign object damage.

Front 36

What type of damage can be identified by loosened, sheared, or popped rivets?

Back 36

Stress.

Front 37

When inspecting an area for damage, you should always check rivet and bolt holes for what condition?

Back 37

Elongation.

Front 38

What type of test should always be performed on metal after a fire has occurred?

Back 38

Hardness test.

Front 39

If you suspect a crack exists, what type of inspection should you perform?

Back 39

Nondestructive inspection.

Front 40

Small cracks that can be stop-drilled, dents, scratches, or other minor damage that does not require major repair or replacement and does not restrict flight status is defined as what type of damage?

Back 40

Negligible damage.

Front 41

Damage that cannot be repaired by any practical means is defined as what type of damage?

Back 41

Damage requiring replacement.

Front 42

The major requirement on making a repair is to ensure you duplicate what condition?

Back 42

Strength of the original part or structure.

Front 43

The process of interpreting and transcribing of information from blueprints, drawings, and written instructions for the metal to be made into aircraft parts is known by what term?

Back 43

Layout.

Front 44

If you are required to fabricate multiple parts of the same dimensions, what can you use to ensure a higher degree of uniformity and speed production?

Back 44

A template.

Front 45

What can you use to maintain aerodynamic smoothness when repairing negligible damage, steps, and gaps?

Back 45

Aerodynamic filler.

Front 46

What step must you take before applying a lap patch over a crack?

Back 46

Stop-drill both ends of the crack.

Front 47

As a general rule, when you make a flush patch, what is the maximum clearance between the skin and the filler?

Back 47

1/32 in.

Front 48

When making a repair over an internal structure, what rivet pattern must you use?

Back 48

The existing rivet pattern.

Front 49

The main spanwise members designed primarily to take bending loads on the wing or other airfoils are known as what type of members?

Back 49

Spars.

Front 50

What structural members are designed to give the airfoil shape and rigidity?

Back 50

Ribs.

Front 51

What structural member runs fore-and-aft along the length of the fuselage and is continuous across frames and bulkheads?

Back 51

Longeron.

Front 52

The self-sealing fuel cells now in naval service are made up of what total number of primary layers of material?

Back 52

Four.

Front 53

What is the main advantage of a bladder-type fuel cell over a self-sealing fuel cell?

Back 53

Less total weight.

Front 54

When applying the nylon barrier of a rubber-type bladder fuel cell, you should use what method of application?

Back 54

Brush, swab, or spray.

Front 55

The milled skins of an integral fuel cell are normally fastened to the aircraft by what means?

Back 55

Bolts.

Front 56

What is the first step you should take to stop a fuel leak in an integral fuel cell?

Back 56

Retorque all fasteners 6 inches on either side of the leak.

Front 57

A fuel leak that reappears 30 minutes after it is wiped dry is classified as what category of leakage?

Back 57

Seep.

Front 58

To allow the gun piston to return before another cycle can begin, the trigger of a sealant injector gun must be released approximately how often?

Back 58

Every 30 seconds.

Front 59

What gas is used to pressure test a repair made on an integral fuel cell?

Back 59

Nitrogen.