Question 1

Kevlar does not have good compression strength

Answer

true

Question 2

Carbon fiber and graphite are actually the same fabric.

Answer

true

Question 3

Warp threads run perpendicular to the selvage edge

Answer

true

Question 4

The selvage edge is the strongest weave in the fabric

Answer

true

Question 5

Bidirectional fabric normally  has more fill threads than warp threads

Answer

true

Question 6

The selvage edge is normally removed before the fabric is used in a lay-up.

Answer

true

Question 7

Kevlar's greatest strength is in tension.

Answer

true

Question 8

An inter-ply fabric is one that utilizes reinforcing material that is woven from 2 or more different fibers.

Answer

true

Question 9

Unidirectional fabric is especially strong with respect to loads imposed at 90 degrees to the fiber direction

Answer

true

Question 10

Epoxy is an example of a thermoset resin

Answer

true

Question 11

the strength of a composite lay-up depends primarily on the type of resin used for the matrix

Answer

true

Question 12

The tensile strength of a fully cured composite lay-up is normally less than the tensile strength of the unwetted fabric alone .

Answer

true

Question 13

The strength of a composite fabric is parallel to the directions that the threads run

Answer

true

Question 14

Addition of an epoxy resin to fiberglass cloth increases the brittleness of the lay-up.

Answer

true

Question 15

Honeycomb core material is often made from polystyrene foam

Answer

true

Question 16

Polystyrene foam core material will dissolve when it comes in contact with polyester or vinyl-ester resin.  Therefore it is typically only used with epoxy resin systems.

Answer

true

Question 17

Boron fiber is made by heating a carbon or tungsten filament in an atmosphere of boric acid. As the heated filament passes through the boric acid the boron particles bond to the heated filament forming the boron fiber.

Answer

true

Question 18

One disadvantage to a room-temperature cured fiberglass structure is their tendency to creep or distort at high ambient temperature

Answer

true

Question 19

A hybrid is combination of 2 more types of fiber used to make a composite structure.

Answer

true

Question 20

Warp threads run the length of the fabric roll

Answer

true

Question 21

Polyurethane core material is easily shaped, using a hot wire as the preferred method cutting

Answer

true

Question 22

The word "composites" is an all inclusive tern regarding any method of airplane construction

Answer

true

Question 23

Styrofoam is a form of honeycomb core material

Answer

true

Question 24

Nomex is a form of honeycomb core material

Answer

true

Question 25

Boron fiber is made by passing tungsten fiber through a  nuclear reactor at 2000 degrees F

Answer

true

Question 26

Foam cores comes in various cell sizes and densities

Answer

true

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