.q 1 0
What is a composite?
.
.a a.	Recycled waste.
.a b.	A chemical reaction.
.a c.	The latest computer software.
.a d.	A structural material consisting of two or more constituents. 
.A 4
.R
A composite is a structural material which consists of combining two or more constituents
.

.q 2 0
Advanced composites are
.
.a a.	naturally found.
.a b.	traditionally used in aerospace industries.
.a c.	low performance composites.
.A 2
.R
Advanced composites are traditionally used in aerospace industries 
.

.q 3 0
Composites are easy to repair.
.
.a a.	True.
.a b.	False.
.A 2
.R
Composites are generally difficult to repair 
.

.q 4 0
What fiber factors contribute to the mechanical performance of a composite?
.
.a a.	Length.
.a b.	Orientation.
.a c.	Shape.
.a d.	All of the above.
.A 4
.R
Length, orientation, and shape all contribute to the mechanical performance of a composite 
.

.q 5 0
PMC stands for:
.
.a a.	Polymer Metal Composition.
.a b.	Polymer Matrix Composite.
.a c.	Polyethylene Metal Composition.
.A 2
.R
PMC stands for Polymer Matrix Composite 
.

.q 6 0
The most common advanced composites are
.
.a a.	Metal Matrix Composites.
.a b.	Polymer Matrix Composites.
.a c.	Ceramic Matrix Composites.
.A 2
.R
The most common advanced composites are Polymer Matrix Composites
.

.q 7 0
The most common fibers used in advanced polymer composites are
.
.a a.	glass, steel, and aluminum.
.a b.	glass, graphite, and kelvar.
.a c.	glass, steel, and kelvar.
.A 2
.R
The most common fibers used in advanced polymer composites are glass, graphite, and kelvar
.

.q 8 0
E-glass type fiber is used for
.
.a a.	Electrical applications.
.a b.	Environmental applications.
.a c.	Evaporative applications.
.A 1
.R
E-glass type fiber is used for electrical applications
.

.q 9 0
One of the major drawbacks of composites is
.
.a a.	high cost of fabrication.
.a b.	no body needs them.
.a c.	they are extremely heavy.
.A 1
.R
One of the major drawbacks of composites is their relatively high cost of fabrication
.

.q 10 0
SMC stands for
.
.a a.	Structural Metal Composite.
.a b.	Strong Metal Composite.
.a c.	Sheet Molding Compound.
.A 3
.R
SMC stands for Sheet Molding Compound
.

.q 11 0
Annual growth of composites is at a steady rate of
.
.a a.	5 percent.
.a b.	10 percent.
.a c.	15 percent.
.a d.	-15 percent.
.A 2
.R
Annual growth of composites is at a steady rate of 10 percent
.

.q 12 0
Reducing one pound of mass in a commercial aircraft can save up to how many gallons per year?
.
.a a.	50.
.a b.	350.
.a c.	3500.
.a d.	30000
.A 2
.R
Reducing one pound of mass in a commercial aircraft can save up to 350 gallons per year?
.

.q 13 0
The material of the fiber directly influences the mechanical performance of a composite
.
.a a.	True.
.a b.	False.
.A 1
.R
The material of the fiber directly influences the mechanical performance of a composite
.

.q 14 0
The most common fiber shape is
.
.a a.	Rectangular.
.a b.	Triangular.
.a c.	Circular.
.A 3
.R
The most common fiber shape is circular
.

.q 15 0
The units of fracture toughness are
.
.a a.	MPa-m.
.a b.	MPa^0.5-m.
.a c.	MPa-m^0.5.
.A 3
.R
The units of fracture toughness are MPa-m^0.5
.

.q 16 0
A typical range of carbon content in carbon fiber is
.
.a a.	93-95%.
.a b.	92-95%.
.a c.	93-94%.
.a d.	90-95%
.A 1
.R
A typical range of carbon content in carbon fiber is 93-95%
.

.q 17 0
Graphite fibers have one of the following carbon content
.
.a a.	99%.
.a b.	less than 99%.
.a c.	more than 99%.
.a d.	98%.
.A 3
.R
Graphite fibers have more than 99% carbon content
.

.q 18 0
Thermoset plastic polymers have the following type of bonding
.
.a a.	Covalent bond.
.a b.	Vanderwaals bond.
.a c.	Atomic bond.
.a d.	none of the above
.A 2
.R
Thermoset plastic polymers have Vanderwaals type bonding
.

.q 19 0
Current service temperature limits for polymers reach
.
.a a.	750 degrees Fahrenheit.
.a b.	1750 degrees Fahrenheit.
.a c.	450 degrees Fahrenheit.
.a d.	350 degrees Fahrenheit
.A 1
.R
Current service temperature limits for polymers reach 750 degrees Fahrenheit 
.

.q 20 0
Mechanical fasteners are made of what type of composite
.
.a a.	Boron-Epoxy.
.a b.	Graphite-Epoxy.
.a c.	Carbon-Carbon.
.a d.	All of the above.
.A 3
.R
Mechanical fasteners are made of Carbon-Carbon composites
.

.q 21 0
Isotropic means
.
.a a.	a material with different properties in all directions.
.a b.	a material with the same properties in all directions.
.a c.	a material with elastic properties.
.a d.	none of the above.
.A 2
.R
Isotropic means a material with the same properties in all directions
.

.q 22 0
Composite materials are
.
.a a.	isotropic but not homogeneous.
.a b.	homogeneous but not isotropic.
.a c.	both homogeneous and isotropic.
.a d.	neither homogeneous or isotropic.
.A 4
.R
Composite materials are neither homogeneous or isotropic
.

.q 23 0
Anisotropic materials are
.
.a a.	materials with different properties in all directions.
.a b.	materials with the same properties in all directions.
.a c.	materials with the same properties in two perpendicular directions.
.a d.	none of the above.
.A 1
.R
Anisotropic materials have different properties in all directions
.

.q 24 0
Inter-ply hybrid composites consist of
.
.a a.	two or more different composite systems.
.a b.	two or more different fibers used in the same ply.
.a c.	both a and b.
.a d.	none of the above.
.A 1
.R
Inter-ply hybrid composites consist of two or more different composite systems
.

.q 25 0
Aramid fibers are made up of
.
.a a.	Carbon, Hydrogen, Oxygen and Graphite.
.a b.	Carbon, Hydrogen, Oxygen and Nitrogen.
.a c.	Carbon, Hydrogen, Oxygen.
.a d.	Carbon, Hydrogen, Nitrogen.
.A 2
.R
Aramid fibers are made up of Carbon, Hydrogen, Oxygen and Nitrogen
.

.q 26 0
A typical example of thermoplastics include
.
.a a.	polyethylene.
.a b.	polyesters.
.a c.	phenolics.
.A 1
.R
A typical example of thermoplastics include polyethylene
.

.q 27 0
Polymer matrix composites are manufactured in the automotive industry where short production runs are necessary by
.
.a a.	filament winding.
.a b.	autoclave forming.
.a c.	resin transfer molding.
.a d.	none of the above.
.A 3
.R
Polymer matrix composites are manufactured in the automotive industry where short production runs are necessary by resin transfer molding
.

.q 28 0
Which of the following composites are replacing metals in golf club shafts
.
.a a.	Carbon-Carbon.
.a b.	Graphite-Epoxy.
.a c.	Boron-Epoxy.
.a d.	none of the above.
.A 2
.R
Graphite-Epoxy is replacing metals in golf club shafts
.

.q 29 0
Which of the following is a drawback for phenolic resin systems
.
.a a.	high cost.
.a b.	low mechanical strength.
.a c.	high void content.
.a d.	brittleness.
.A 1
.R
High cost is a drawback for phenolic resin systems
.

.q 30 0
Bullet proof vests use
.
.a a.	Kelvar.
.a b.	Graphite.
.a c.	Boron.
.a d.	Glass.
.A 1
.R
Bullet proof vests use Kelvar
.

.q 31 0
High performance applications in the aerospace industry use
.
.a a.	Graphite.
.a b.	Boron.
.a c.	Kelvar 49.
.a d.	Kelvar 29.
.A 3
.R
High performance applications in the aerospace industry use Kelvar 49
.

.q 32 0
Thermoset polymers show which of the following
.
.a a.	Decompose on heating.
.a b.	Soften on heating.
.a c.	Harden on heating.
.a d.	none of the above.
.A 1
.R
Thermoset polymers decompose on heating
.

.q 33 0
The performance indicator for buckling of a rod under a compressive load is
.
.a a.	Young's modulus / density.
.a b.	(Young's modulus ^ 0.5) / density.
.a c.	(Young's modulus ^ 0.3333) / density. 
.A 2
.R
The performance indicator for buckling of a rod under a compressive load is (Young's modulus ^ 0.5) / density
.

.q 34 0
Specific modulus is given by
.
.a a.	Square root of Young's modulus / density.
.a b.	Strength / density.
.a c.	Young's modulus / density.
.A 3
.R
Specific modulus is given by Young's modulus / density
.

.q 35 0
Glass fibers are made from
.
.a a.	slice glass.
.a b.	vapor deposition method.
.a c.	graphite.
.A 1
.R
Glass fibers are made from slice glass
.

.q 36 0
Which polymer is not desirable for smoke emmision?
.
.a a.	Phenolic.
.a b.	Epoxy.
.a c.	Polyester.
.a d.	Polymide.
.A 4
.R
Polymide is not desirable for smoke emmision
.

.q 37 0
Which polymer has the maximum strength?
.
.a a.	Phenolic.
.a b.	Epoxy.
.a c.	Polyester.
.a d.	Polymide.
.A 2
.R
Epoxy has the maximum strength
.

.q 38 0
Which polymer has the highest service temperature?
.
.a a.	Phenolic.
.a b.	Epoxy.
.a c.	Polyester.
.a d.	Polymide.
.A 4
.R
Polymide has the highest service temperature
.

.q 39 2
What do you think of this test?
.
.a 8 60
.A kaw@eng.usf.edu