Aviation Structural Mechanic Navedtra 14315 Chapter 4

Front 1

A soft faced hammer is know 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 differnece between snips and shears?

Back 7

normally shears are used to cut heavier gauge metal

Front 8

What are the five types of pneumatic riveters?

Back 8

one-shot gun, fast-hitting gun, slow-hitting gun, corner gun, and squeeze riveter

Front 9

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

Back 9

one-shot gun

Front 10

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

Back 10

it can cause the drill to side slip and the hole to be elongated

Front 11

Most pneumatic drills are powered by what type of motor?

Back 11

vane air

Front 12

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

Back 12

snake drill

Front 13

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

Back 13

dimple

Front 14

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

Back 14

aluminum alloys are subject to cracking when formed

Front 15

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

Back 15

unishears

Front 16

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

Back 16

bar folder

Front 17

What brake has removable steel fingers of vayring widths?

Back 17

box and pan brake

Front 18

What is the most commonly used layout fluid?

Back 18

bluing fluid

Front 19

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

Back 19

to indicate where the metal is to be cut or drilled

Front 20

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

Back 20

bend allowance

Front 21

What is the outside dimension of the formed part called?

Back 21

Base measurement

Front 22

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

Back 22

radius

Front 23

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

Back 23

power and manual operated

Front 24

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 24

rubber, plastic, or rawhide

Front 25

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

Back 25

1/4 inch

Front 26

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

Back 26

use a piece of scrap metal

Front 27

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

Back 27

two

Front 28

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

Back 28

slip-roll forming machine

Front 29

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

Back 29

beading rolls

Front 30

What determines the minimum rivet diameter?

Back 30

the thickness of the metal being riveted

Front 31

what is the Navy standard countersink angle?

Back 31

100 degrees

Front 32

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

Back 32

huch rivet

Front 33

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

Back 33

No. 31 drill bit

Front 34

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

Back 34

inspect for secondary damage

Front 35

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

Back 35

corrosion damage

Front 36

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

Back 36

Foreign object damage

Front 37

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

Back 37

stress

Front 38

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

Back 38

elongation

Front 39

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

Back 39

hardness test

Front 40

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

Back 40

NDI

Front 41

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 statue is defined as what type of damage?

Back 41

negligible damage

Front 42

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

Back 42

damage requiring replacement

Front 43

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

Back 43

strength of the original part or structure

Front 44

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 44

layout

Front 45

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 45

template

Front 46

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

Back 46

aerodynamic filler

Front 47

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

Back 47

stop drill both ends of the crack

Front 48

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

Back 48

1/32 inch

Front 49

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

Back 49

the existing rivet pattern

Front 50

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

Back 50

spars

Front 51

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

Back 51

ribs

Front 52

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

Back 52

longeron

Front 53

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

Back 53

four

Front 54

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

Back 54

less total weight

Front 55

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

Back 55

brush, swab, or spray

Front 56

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

Back 56

bolts

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

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

Back 58

retorque all fasteners 6 inches on either side of the leak

Front 59

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 59

every 30 seconds

Front 60

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

Back 60

nitrogen