MSE250 - EXAM 3 QUESTIONS AND
ANSWERS GRADED A+ 2025/2026
Plastic deformation of metals occurs by motion of __.
a. strain
b. dislocations
c. stress
d. vacancies
e. none of the above - ANS b. dislocations
On a microscopic scale, metals are strengthened by atomic-level __ that impede __ of __.
a. barriers; motion; dislocations
b. resistors; resistance; electrons
c. vacancies; annihilation; vacancies
d. substitutionals; annihilation of interstitials
e. none of the above - ANS a. barriers; motion; dislocations
Stress-strain Curves of metals can be modified by __ hardening, __ strengthening and __
reduction.
a. stress; heat; impurity
b. strain; heat; impurity
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,c. strain; solid-solution; grain-size
d. stress; solid-solution; grain-size
e. none of the above - ANS c. strain; solid-solution; grain-size
There are __ mechanisms of annealing for cold-worked metals.
a. 2
b. 4
c. 6
d. 3
e. none of the above - ANS d. 3
There are differences in __ for cold-working versus hot-working of metals.
a. mass processed
b. velocity of use
c. processing conditions
d. all of the above
e. none of the above - ANS c. processing conditions
Cold-working results in different __ of metals compared to hot-working.
a. properties
b. masses
c. velocities
d. processes
e. none of the above - ANS a. properties
Methods that are used to shape metal parts include __, __, __, __, and __.
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,a. sintering; extrusion; drawing; forging; deep drawing
b. rolling; sintering; drawing; forging; deep drawing
c. rolling; extrusion; drawing; forging; deep drawing
d. rolling; extrusion; drawing; sintering; deep drawing
e. none of the above - ANS c. rolling; extrusion; drawing; forging; deep drawing
Cold working of a metal results in __ of the metal.
a. strain softening
b. strain hardening
c. creep
d. fatigue hardening
e. none of the above - ANS b. strain hardening
Deformation processing reduces the __ of the metal.
a. cross-sectional area
b. length
c. weight
d. mass
e. none of the above - ANS a. cross-sectional area
Aluminum rods are formed by a process of __.
a. forging
b. drawing
c. rolling
d. extrusion
e. intrusion - ANS d. extrusion
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, Steel slabs are formed by a process of __.
a. forging
b. drawing
c. rolling
d. extrusion
e. intrusion - ANS c. rolling
Metal wire coils are formed by a process of __.
a. forging
b. drawing
c. rolling
d. extrusion
e. intrusion - ANS b. drawing
An auto-engine connecting rod is formed by a process of __.
a. forging
b. drawing
c. rolling
d. extrusion
e. intrusion - ANS a. forging
Cold-working increases the __ density, __ strength and __ strength.
a. vacancy; interstitial; substitutional
b. dislocation; yield; tensile
c. interstitial; yield; compressive
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ANSWERS GRADED A+ 2025/2026
Plastic deformation of metals occurs by motion of __.
a. strain
b. dislocations
c. stress
d. vacancies
e. none of the above - ANS b. dislocations
On a microscopic scale, metals are strengthened by atomic-level __ that impede __ of __.
a. barriers; motion; dislocations
b. resistors; resistance; electrons
c. vacancies; annihilation; vacancies
d. substitutionals; annihilation of interstitials
e. none of the above - ANS a. barriers; motion; dislocations
Stress-strain Curves of metals can be modified by __ hardening, __ strengthening and __
reduction.
a. stress; heat; impurity
b. strain; heat; impurity
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,c. strain; solid-solution; grain-size
d. stress; solid-solution; grain-size
e. none of the above - ANS c. strain; solid-solution; grain-size
There are __ mechanisms of annealing for cold-worked metals.
a. 2
b. 4
c. 6
d. 3
e. none of the above - ANS d. 3
There are differences in __ for cold-working versus hot-working of metals.
a. mass processed
b. velocity of use
c. processing conditions
d. all of the above
e. none of the above - ANS c. processing conditions
Cold-working results in different __ of metals compared to hot-working.
a. properties
b. masses
c. velocities
d. processes
e. none of the above - ANS a. properties
Methods that are used to shape metal parts include __, __, __, __, and __.
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,a. sintering; extrusion; drawing; forging; deep drawing
b. rolling; sintering; drawing; forging; deep drawing
c. rolling; extrusion; drawing; forging; deep drawing
d. rolling; extrusion; drawing; sintering; deep drawing
e. none of the above - ANS c. rolling; extrusion; drawing; forging; deep drawing
Cold working of a metal results in __ of the metal.
a. strain softening
b. strain hardening
c. creep
d. fatigue hardening
e. none of the above - ANS b. strain hardening
Deformation processing reduces the __ of the metal.
a. cross-sectional area
b. length
c. weight
d. mass
e. none of the above - ANS a. cross-sectional area
Aluminum rods are formed by a process of __.
a. forging
b. drawing
c. rolling
d. extrusion
e. intrusion - ANS d. extrusion
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, Steel slabs are formed by a process of __.
a. forging
b. drawing
c. rolling
d. extrusion
e. intrusion - ANS c. rolling
Metal wire coils are formed by a process of __.
a. forging
b. drawing
c. rolling
d. extrusion
e. intrusion - ANS b. drawing
An auto-engine connecting rod is formed by a process of __.
a. forging
b. drawing
c. rolling
d. extrusion
e. intrusion - ANS a. forging
Cold-working increases the __ density, __ strength and __ strength.
a. vacancy; interstitial; substitutional
b. dislocation; yield; tensile
c. interstitial; yield; compressive
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