Questions And CORRECT Answers
Composites manufacturing is a _______ a year industry. - CORRECT ANSWER - 53
billion
90% of all composites are comprised of ____ and either ____ or _____. - CORRECT
ANSWER - glass fiber and either polyester or vinyl ester resin
What percentage of composites are manufactured using the open molding method? - CORRECT
ANSWER - 65%
What percentage of composites are manufactured using the closed molding method? -
CORRECT ANSWER - 35%
cast polymer - CORRECT ANSWER - used to describe a variety of materials including
cultured marble, onyx, granite, etc.
composites are broadly known as _____. - CORRECT ANSWER - reinforced plastics
open molding - CORRECT ANSWER - open to the atmosphere, also known as contact
molding
closed molding - CORRECT ANSWER - closed from the atmosphere
thermoplastics - CORRECT ANSWER - can be heated and formed and can be re-heated to
a liquid
thermoset - CORRECT ANSWER - known as cross-linking and is irreversable
,Benefits of composites (5) - CORRECT ANSWER - high strength
light weight
durability
corrosion resistance
design flexibility
examples of consumer composites - CORRECT ANSWER - automobiles, boats, sporting
goods
example of industrial composites - CORRECT ANSWER - environmental structures
example of advanced composites - CORRECT ANSWER - aerospace, military armor
two examples of ancient composites - CORRECT ANSWER - adobe, mongolian bow
Advantages of composites (4) - CORRECT ANSWER - high specific strength
ability to form shapes
inherent durability
low relative investment
When were composites developed? - CORRECT ANSWER - 1940s
composites - CORRECT ANSWER - a combination of a polymer matrix and fiber
reinforcement
matrix - CORRECT ANSWER - the resin which holds the reinforcement fibers in place
reinforcement - CORRECT ANSWER - a fiber placed in a resin matrix
, polyester resin - CORRECT ANSWER - the most common resin used in composites
vinyl ester resin - CORRECT ANSWER - a premium resin for composites products, often
used in corrosion applications
glass fiber - CORRECT ANSWER - reinforcement fibers are made from molten glass,
used to reinforce a resin matrix
specific strength - CORRECT ANSWER - the strength of a material compared to its
weight
synthetic resin - CORRECT ANSWER - a man made combination of chemicals
polymerization - CORRECT ANSWER - the conversion of a thermoset resin from liquid
to solid
cross-linking - CORRECT ANSWER - the molecular bonding that takes place during
polymerization
The two general divisions of composites manufacturing are ____ and ____. - CORRECT
ANSWER - Open molding and closed molding
Open molding processing methods (3) - CORRECT ANSWER - Hand lay up
Chopped laminate process
filament winding
Application processes for hand lay up (2) - CORRECT ANSWER - manual resin
application
mechanical resin application