6.
What type corrosion is present when you can see the lifting of
the metal's surface grain?
______.
A
Exfoliation.
______.
B
Intergranular.
______.
C
Metal-ion.
______.
D
Stress.
7.
Which type of stress is called a combination of stresses?
______.
A
Compression.
______.
B
Shear.
______.
C
Tension.
______.
D
Torsion.
8.
When a rivet is cut into, the stress applied is called--
______.
A
bending.
______.
B
compression.
______.
C
shear.
______.
D
torsion.
9.
What percentage of strength must be returned to a noncritical
area when patching?
______.
A
50.
______.
B
60.
______.
C
65.
______.
D
70.
10.
What drill size should you use when stop drilling a crack?
______.
A
#11.
______.
B
#21.
______.
C
#30.
______.
D
#40.
11.
To what angle must you chamfer a patch edge?
20.
______.
A
30.
______.
B
______.
C
45.
______.
D
55.
12.
What is the correct thickness for a patch doubler?
______.
A
One gage thicker than the skin.
______.
B
The same thickness as the skin.
______.
C
One gage lighter than the skin.
______.
D
.050 inch thick.
91
AL0992
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