.q 1 0
Which matrix has to equal zero in order to avoid warpage due to thermal loading in a laminate?
.
.a a.	Extensional Stiffness Matrix.
.a b.	Coupling Matrix.
.a c.	Bending Stiffness Matrix.
.A 2
.R
Uncoupling of the extension and bending matrices prevents the laminate from twisting due to thermal loads
.

.q 2 0
Give an example of a symmetric laminate:
.
.a a.	[0/30/30/0/30]
.a b.	[0/45/45]
.a c.	[0/30/0]
.A 3
.R
[0/30/0] is a symmetric laminate.
.

.q 3 0
What angle plies are used to make a cross-ply laminate?
.
.a a.	0,80	
.a b.	0,45,-45,90
.a c.	0,90
.a d.	45,-45
.A 3
.R
A laminate is called a cross-ply laminate if only 0 and 90 degree plies were used to make the laminate
.

.q 4 0
Give an example of a balance laminate:
.
.a a.	[30/-30]	
.a b.	[45/30]
.a c.	[60/30]
.A 1
.R
[30/-30] is an example of a balanced laminate
.

.q 5 0
What does a quasi-isotropic laminate simulate?
.
.a a.	an isotropic metal in extension	
.a b.	an isotropic material in bending
.a c.	an isotropic material in both bending and extension
.A 1
.R
A laminate is called a quasi-isotropic if its extensional stiffness matrix behaves like that of an isotropic material
.

.q 6 0
What is the minimum number of plies to make a quasi-isotropic laminate?
.
.a a.	2	
.a b.	3
.a c.	4
.A 2
.R
One can make a quasi-isotropic laminate by having a laminate with 3 or more laminas of the same material and thickness
.

.q 7 0
If one ply fails in a laminate, does the entire laminate fail?
.
.a a.	No	
.a b.	Yes
.a c.	Maybe
.A 3
.R
A laminate will fail under increasing mechanical and thermal loads, however, the laminate failure may not be catastrophic
.

.q 8 0
A [0/90] laminate is
.
.a a.	quasi-isotropic.
.a b.	not quasi-isotropic.
.a c.	may or may not be quasi-isotropic.
.A 2
.R
A [0/90] laminate is not quasi-isotropic
.

.q 9 0
In a cylindrical pressure vessel under uniform internal pressure the
.
.a a.	hoop stress is the same as the longitudinal stress.
.a b.	hoop stress is twice the longitudinal stress.
.a c.	hoop stress is half the longitudinal stress.
.A 2
.R
In a cylindrical pressure vessel under uniform internal pressure the hoop stress is twice the longitudinal stress
.

.q 10 0
In a spherical pressure vessel under uniform internal pressure the
.
.a a.	hoop stress is the same as the longitudinal stress.
.a b.	hoop stress is twice the longitudinal stress.
.a c.	hoop stress is half the longitudinal stress.
.A 1
.R
In a spherical pressure vessel under uniform internal pressure the hoop stress is same as the longitudinal stress
.

.q 11 2
What do you think of this test?
.
.a 8 60
.A kaw@eng.usf.edu