MSE 250 EXAM 3 QUESTIONS & ANSWERS
1. Phase diagrams help us to infer the expected of a particular phase
in an alloy system.
a. density
b. mass
c. volume
d. microstructure
e. none of the above- Answer - d. microstructure
2. Given the and alloy on a phase diagram, it is possible to determine the
that are present in a 1-phase or 2-phase region on the phase diagram.
a. pressure; volume; elements
b. pressure; time; phases
c. temperature; composition; phases
d. mass; temperature; phases
e. none of the above- Answer - c. temperature; composition; phases
3. Cold-working results in different of metals compared to hot-working.
a. properties
b. masses
c. velocities
d. processes
e. none of the above- Answer - a. properties
4. When a hypereutectic Pb-Sn alloy is cooled to just below the liquidus temper-
ature, it forms a region with small particles + alloy.
a. pure Sn; pure Pb
,b. pure Sn; liquid
c. beta; liquid
d. alpha; solid beta
e. none of the above- Answer - c. beta; liquid
5. The highest shear strength for Pb-Sn solder balls occurs at a composition of
about % tin.
a. 0.62
b. 6.2
c. 620
, d. 62
e. none of the above- Answer - d. 62
6. A HCP crystal structure is a structure.
a. Hexagonal Close-Packed
b. Hexagonal Cubic Centered
c. Hexagonal Centered Cubic
d. Heptagonal Close-Packed
e. none of the above- Answer - a. Hexagonal Close-Packed
7. Non-equilibrium microstructures can be correlated to the
properties of steels.
a. electrical
b. isothermal
c. mechanical
d. isobaric
e. none of the above- Answer - c. mechanical
8. Solid-solution alloying of Cu with Ni the tensile strength of the Cu.
a. decreases
b. does not affect
c. increases to infinity
d. increases
e. none of the above- Answer - d. increases
9. Annealing a cold-worked metal lowers the dislocation density to about
cm/cm^3.
a. 8
1. Phase diagrams help us to infer the expected of a particular phase
in an alloy system.
a. density
b. mass
c. volume
d. microstructure
e. none of the above- Answer - d. microstructure
2. Given the and alloy on a phase diagram, it is possible to determine the
that are present in a 1-phase or 2-phase region on the phase diagram.
a. pressure; volume; elements
b. pressure; time; phases
c. temperature; composition; phases
d. mass; temperature; phases
e. none of the above- Answer - c. temperature; composition; phases
3. Cold-working results in different of metals compared to hot-working.
a. properties
b. masses
c. velocities
d. processes
e. none of the above- Answer - a. properties
4. When a hypereutectic Pb-Sn alloy is cooled to just below the liquidus temper-
ature, it forms a region with small particles + alloy.
a. pure Sn; pure Pb
,b. pure Sn; liquid
c. beta; liquid
d. alpha; solid beta
e. none of the above- Answer - c. beta; liquid
5. The highest shear strength for Pb-Sn solder balls occurs at a composition of
about % tin.
a. 0.62
b. 6.2
c. 620
, d. 62
e. none of the above- Answer - d. 62
6. A HCP crystal structure is a structure.
a. Hexagonal Close-Packed
b. Hexagonal Cubic Centered
c. Hexagonal Centered Cubic
d. Heptagonal Close-Packed
e. none of the above- Answer - a. Hexagonal Close-Packed
7. Non-equilibrium microstructures can be correlated to the
properties of steels.
a. electrical
b. isothermal
c. mechanical
d. isobaric
e. none of the above- Answer - c. mechanical
8. Solid-solution alloying of Cu with Ni the tensile strength of the Cu.
a. decreases
b. does not affect
c. increases to infinity
d. increases
e. none of the above- Answer - d. increases
9. Annealing a cold-worked metal lowers the dislocation density to about
cm/cm^3.
a. 8
