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Term 5 > Composite Review > Flashcards

Composite Review Flashcards

1
Q

Blue Diamond safety label?

A

Health Hazard

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2
Q

Red Diamond safety label?

A

Flammability

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3
Q

E-glass “E” is for what?

A

Electrical

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4
Q

S-glass “S” is for what?

A

Strong/Structural

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5
Q

C-glass “C” is for what?

A

Ceramic

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6
Q

L-glass “L” is for what?

A

Lead

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7
Q

Pre-preg cloth is cured by what two things?

A

Heat and pressure

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8
Q

Honeycomb material is made of what?

A

Metal, plastic, or paper.

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9
Q

What is the primary job of resin?

A

Carry the load from one fiber to the next.

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10
Q

The amount of time a catalyzed resin will remain in a workable state is called?

A

Pot life

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11
Q

Fabric will be strongest in what direction?

A

Warp direction

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12
Q

The diagonal line across a piece of weave is what?

A

Bias

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13
Q

The strength and stiffness of a composite lay-up depends on?

A

The orientation of the of the plies to the load direction.

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14
Q

What is the selvage edge?

A

A manufacturered edge to prevent edges from raveling.

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15
Q

What is Uni-directional and Bi-directional weaves?

A

Uni: one direction. Bi: two directions.

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16
Q

What is pre-preg?

A

Prepregnated cloth with a resin at the factory.

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17
Q

Threads perpendicular to the warp threads is called?

A

Woof or Weft.

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18
Q

Threads 45° to the warp thread is called?

A

Bias.

19
Q

Orientation of the fibers of cloth for a composite repair is called?

A

Warp clock.

20
Q

The preferred way to make repairs on composite structures is?

A

Remove the damage and lay in plies.

21
Q

What is the maximum diameter that can be repaired by potted compound?

A

1 inch.

22
Q

How are superficial scars, scratches, etc. repaired on fiberglass laminates?

A

Adding layers of resin.

23
Q

Conventional rivets on composite materials can result in what?

A

Delamination.

24
Q

When drilling transparent plastics, how is it performed?

A

High speed, light pressure while using a modified drill bit.

25
Q

What is the purpose of the bleeder ply?

A

Absorbs excess resin.

26
Q

Thermosetting plastics can be reformed by applying heat. (T/F)

A

False

27
Q

While using bolts or self-locking nuts, how are the nuts tightened?

A

Tightened until snug, then backed off a full turn.

28
Q

How is cleaning of transparent plastics accomplished?

A

Flush with water, the apply soap and water with hands.

29
Q

How are transparent plastics stored?

A

Sheets are placed on racks (flat), or 10° vertical.

30
Q

What is the appearance of crazing in transparent plastics?

A

Hazy or milky spots.

31
Q

What size drill bit is used to stop drill cracks in transparent plastics?

A

30 bit, 1/8”, .125

32
Q

Is any form of decay acceptable in wooden structures?

A

No.

33
Q

Laminated wood has how many layers with the grain running parallel to each other?

A

Two or more.

34
Q

Plywood has how many layers with the grain running 90° to each other?

A

An odd number of layers.

35
Q

What book is used to fine acceptable wood substitutions?

A

AC43.13-1B

36
Q

What is the maximum grain deviation in wooden structures?

A

1:15

37
Q

Pin knot cluster are acceptable, providing there is only what?

A

A small effect on grain deviation.

38
Q

What is the (psi) gluing pressure for hardwood?

A

150-200 psi.

39
Q

What is the preferred way to repair plywood skin?

A

Using a scarf patch.

40
Q

What is the strength of a wood joint provided by?

A

Glue.

41
Q

Sanding of hardwood surfaces can improve gluing. (T/F)

A

True.

42
Q

What type of wood is used for cores?

A

Balsa.

43
Q

How many repairs are allowed on a spar?

A

Two splices to one spar.

44
Q

Why is a wooden I-beam routed?

A

To reduce weight.

Term 5 (4 decks)

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