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Manufacturing Engineering Ii
Manufacturing Processes Objective
Quiz 1
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Q.1
The ratio of ______ is frequently used in the interpretation of recrystallization data.
a) yield strength of test specimen and standard specimen
b) temperature and time
c) rate of nucleation and rate of growth
d) rate of recrystallization and polygonization
Q.2
Many nuclei will form before the recrystallization process is completed if the ratio of the rate of nucleation to the rate of growth is _____
a) high
b) low
c) equal to 1
d) higher than rate of grain growth
Q.3
The ratio N to G decreases in magnitude with decreasing _____
a) temperature
b) stress
c) strain
d) grain size
Q.4
The rate of recrystallization is dependent upon how many variables?
a) 2
b) 3
c) 4
d) It is an independent value
Q.5
Which of the following materials has rapid rates of recrystallization?
a) Pure metals
b) Alloys
c) Ductile metals
d) Coinage metal
Q.6
The increase in the recrystallization temperature caused due to foreign atoms depends on _____
a) nature of foreign atoms
b) temperature of foreign atoms
c) size of foreign atoms
d) electronegativity of foreign atoms
Q.7
Decreasing the grain size increases the _____
a) recrystallization time
b) nucleation rate
c) grain boundary area
d) recrystallization temperature
Q.8
_____ is the driving force for grain growth.
a) Strain
b) Surface energy
c) Recrystallization
d) Surface hardness
Q.9
Annealing of a slightly deformed metal specimen can lead to a localized, very coarse-grain growth.
a) True
b) False
Q.10
Foreign atoms lowers the recrystallization rates.
a) True
b) False
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