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M7 E > M7.18 > Flashcards

M7.18 Flashcards

1
Q

What is cold light?

A

Artificial light without heat or electrical sparking

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2
Q

What type of magnifying glass is used for viewing inside structures?

A

8x magnification and with it own light source

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3
Q

What are the four enteral groups of damage?

A
  • mechanical action
  • chemical action
  • thermal action
  • inherent metallic properties
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4
Q

What is allowable damage?

A

Damage which is slight or of little significance

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5
Q

What is non-allowable damage?

A

Damage that must be repaired

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6
Q

What is non-repairable damage?

A

Where it is beyond repair and must be replaced

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7
Q

What is abrasion by hand suitable for?

A

Light areas of corrosion

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8
Q

What types of wire brushes should you use to remove heavy corrosion?

A

Stainless steel or aluminium oxide-coated

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9
Q

What types of metals can you not use grinders on?

A

Aluminium alloys

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10
Q

What strength of magnifier should you use to check if the corrosion is gone?

A

X10 magnifier

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11
Q

What are phosphate coatings used on?

A

Steel parts

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12
Q

What classifies as a paint finish?

A

Anything manually painted or sprayed on components

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13
Q

What is the two reasons paint is used?

A

A pleasant finish and protection

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14
Q

When would you not use FCR (filiform corrosion resistant) primer?

A

When humidity is higher than 75% or the temperature is below 15.C

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15
Q

What is the pot life time of an intermediate primer?

A

6 hours at 18-22.C

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16
Q

What is the pot life of an epoxy primer?

A

4 hours

17
Q

What is the cure time for an epoxy primer?

A

24 hours at 18.C

18
Q

What is the cure time for AV100?

A

6 hours

19
Q

What are the four types of sealing?

A
  • absolute
  • extensive
  • intermediate
  • limited
20
Q

What are fillets used for?

A

Maximum protection from fluid leakage

21
Q

When apply smothers how much filler should you use?

A

Always more than you need so you can remove some to create the smoothness

22
Q

What must you remember when using a sealant cap?

A

To leave some sealant on top and around the bottom

23
Q

What are most sealants known chemically as?

A

Polysulfides

24
Q

What are the two types of sealing compound?

A

Silicone and non-silicone

25
Q

What is special about silicone sealing compounds?

A
  • White, red, grey in colour

- heat resistant

26
Q

What is special about non-silicone sealing compounds?

A
  • can be any colour

- not heat resistant

27
Q

What are the typical classification systems for sealants?

A
  • class A = brushcoat sealent
  • class B = filleting sealent
  • class C = faying sealent
  • class D = hole-filling sealent
  • class E and F = sprayable sealent
28
Q

What is application time of a sealant?

A

The time in which the sealant can be readily extruded from gun

29
Q

What is squeeze-out life of sealants?

A

The time in which sealant can be squeezed out of a when fasteners are installed

30
Q

What is tack-free time of sealants?

A

The time for the sealant to cure sufficiently so that it will not transfer to another object

31
Q

What is cure time of sealants?

A

When the sealant is completely cured and the work can now be done on it

32
Q

What will happen if the temperature of the sealant exceeds 120.F?

A

Bubbling will occur

33
Q

How is curing accelerated?

A

Heating the environment around the sealant (takes longer if cold)

34
Q

How thick should sealant be around a fastener with a sealed cap on it?

A

Minimum of 0.06’ thick

35
Q

How hard should tools be to remove sealant?

A

No harder tan 2024-T3 aluminium

36
Q

What temperature are sealants stored at?

A

-40.F

37
Q

How long should you let sealant thaw for?

A

5-10 mins in warm water or 30 mins at room temperature

M7 E (14 decks)

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