7.18 D Meg

Question 1

Jobs are split up in what 3 areas

Answer 1

Preparation
Safety
The task in hand

Question 2

What should you do when working in electrical equipment

Answer 2

Disconnect or Trip C/Bs
Disconnect batteries

Question 3

What should you do when working in any pressurised systems

Answer 3

De pressurise them

Question 4

How do you remove rivets

Answer 4

Use a drill the same size as the rivet diameter

Question 5

How can you remove welded areas

Answer 5

Melt the weld

Question 6

How do you take apart adhesive areas

Answer 6

Destroy the bond

Question 7

What should you do after re assembly

Answer 7

Always test it

Question 8

What is Cat B not allowed to do

Answer 8

Authorise to certify manufactur or aircraft

Question 9

When paint in metal to metal areas is removed what stripper should you us

Answer 9

Only one that is stipulated in the AMM

Question 10

What is the purpose of a sealant

Answer 10

Used to contain fuel, maintain cabin pressure, reduce fire hazards, exclude moisture, prevent corrosion and fill gaps

Question 11

What is the consistently of a sealant

Answer 11

Applied as wet and then cured to a rubbery solid compound

Question 12

What are the four levels of sealing

Answer 12

Absolute
Extensive
Intermediate
Limited

Question 13

What is fillet seal

Answer 13

Applied at edges of structural joints
(Must be on both sides of seam) (use with a gun)

Question 14

What should you do if a fillet seal has air bubble in

Answer 14

They must be worked out

Question 15

What are injection seals

Answer 15

Applied to fill channels and holes that occur due to structural design

Question 16

What should you do when using an air gun

Answer 16

Never fulling empty it to prevent air in the sealant

Question 17

What is faying surface sealant

Answer 17

A layer of sealant sandwiched between two fastened mating surfaces

Question 18

What is the purpose of faying surface sealant

Answer 18

To prevent corrosion and leak trancing in fuel tank

Question 19

What is a aerodynamic smoother sealant used on

Answer 19

A/c exterior skin gals are filled and surface fares for aerodynamic smoothness

Question 20

What material should you nit use aerodynamic smoothness on until is is hard and tough

Answer 20

Zinc- chromate until primer is hard and tough

Question 21

What is fastener seal used for

Answer 21

A variation of one of the basic sealing processes

Question 22

What is prepack seal

Answer 22

Used to fill structural cavities that are enclosed after assembly and can’t be injected properly

Question 23

How are brush coat seals put in place

Answer 23

By brushing the sealant into place

Question 24

What is a seal plane

Answer 24

Structural boundary where the continuity of the seal is established (barrier beyond which the fuel can’t pass)

Question 25

What is a seal compound

Answer 25

Synthetic rubber materials that are applied in a flow consistency and then cure by chemical reaction into a solid

Question 26

What are the two categories of a compound

Answer 26

Silicone and non silicone

Question 27

What are the characteristics of silicone

Answer 27

Normally white, red or grey and used where heat resistance is required

Question 28

What are the characteristics of non silicone

Answer 28

An6 colour, used where heat resistance is not required

Question 29

What are the classifications of sealants

Answer 29

A- F

Question 30

What is a Class A sealant

Answer 30

Brush coat sealant

Question 31

What is a Class B sealant and what is it

Answer 31

Filleting sealant Heavy consistency with low slump properties

Question 32

What is a Class C sealant and what is it

Answer 32

Faying surface sealant Medium consistency for good spreadability

Question 33

What is a Class D sealant

Answer 33

Hole filling sealant Similar consistency to B

Question 34

What is a Class E and F sealant

Answer 34

Sprayable sealant

Question 35

What is the application time

Answer 35

When the sealant has thawed and can be used (in hours)

Question 36

What is not applicable for a one part sealant

Answer 36

The application time

Question 37

What is the squeeze out life

Answer 37

After thawing during which a faying sealant can be squeezed out of a joint when fasteners are installed

Question 38

What is the tack free time

Answer 38

After thawing the sealnt has cured sufficiently so will not transfer to the finger or plastic film

Question 39

What is the cure time

Answer 39

Time for sealant to cure firmly enough that can be handled without damage

Question 40

What can accelerate the cure time

Answer 40

Heat

Question 41

What temperature do a sealant start to bubble at

Answer 41

120 degrees FARENHEIGHT

Question 42

For fastener sealing in a fuel tank what is used

Answer 42

Metal seal caps normally aluminium

Question 43

How can you tell that a two part sealant is mixed properly

Answer 43

Even colour throughout

Question 44

What could incomplete mixing cause

Answer 44

May affect cure time and performance

Question 45

What are the three methods of mixing

Answer 45

Hand mixing Machine mixing Cartilage hand mixing

Question 46

Can you re freeze a sealant

Answer 46

No

Question 47

What could happen if you use a cold sealant instead of a room temp sealant

Answer 47

Will not adhere to the structure

Question 48

What is the most common cartilage hand mixing

Answer 48

SEMKIT two part material injection

Question 49

What are the two stages of cleaning before sealing

Answer 49

Preliminary cleaning (Removal using a stiff brush and solvent) Final cleaning (Dampen clean wiping material)

Question 50

What temperature should you make sure the material you are sealing to is before sealing

Answer 50

5p degrees Fahrenheit