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Manufacturing Engineering Ii
Manufacturing Science Assessment
Quiz 1
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Q.1
The rate of recrystallization can be enhanced by ______
a) increasing the temperature
b) increasing the percentage of cold work
c) increasing the rate of cooling
d) applying pressure
Q.2
The critical degree of cold work lies between _____ of cold work.
a) 2% and 20%
b) 5% and 10%
c) 7% and 15%
d) 20% and 30%
Q.3
The recrystallization in pure metal is faster than in _____
a) non-metals
b) alloys
c) polymers
d) d-block metals
Q.4
For pure metals, the recrystallization temperature is normally _____
a) equal to Tm
b) 0.5 Tm
c) 0.8 Tm
d) 0.3 Tm
Q.5
In hot working, plastic deformation operations are often carried out at temperatures above the ______ temperature.
a) melting
b) recrystallization
c) room
d) cold working
Q.6
Which of the following metals has recrystallization temperature below 0⁰C?
a) Pb
b) Zn
c) Al
d) Cu
Q.7
Which of the following metals has recrystallization temperature above 1000⁰C?
a) Cu- Zn alloy
b) Ni
c) Fe
d) W
Q.8
Cold working increases ______ of the metal.
a) hardness
b) ductility
c) melting point
d) conductivity
Q.9
Yield strength is the stress corresponding to point of intersection of stress-strain curve and strain offset line.
a) True
b) False
Q.10
The stress level at which plastic deformation begins is known as the proportional limit point.
a) True
b) False
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