True or False? Both pure metals and alloys have clearly defined melting and freezing points.

EML4321 Quiz 2

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12 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
True
False
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The largest amount of shrinkage occurs in which of the following stages?
contraction of the molten metal after pouring
solidification shrinkage during transformation of state from liquid to solid
thermal contraction in the solid state
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Grain size is associated with strength, hardness, and ductility. Large grain size leads to
low strength, low hardness, and low ductility
low strength, low hardness, and high ductility
high strength, high hardness, and high ductility
high strength, high hardness, and low ductility
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Is steel a (a) interstitial solid solution or (b) substitutional solid solution?
(a) interstitial solid solution
(b) substitutional solid solution
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Determine the amount of liquid phase for a 50%Co-50%Ni alloy at 2350°F.
(CO-CL)/(CS-CO)
(CO-CL)/(CS-CL)
(CS-CO)/(CO-CL)
(CS-CO)/(CS-CL)
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What element is traditionally alloyed with copper to form brass?
Tin
Zinc
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the crystal structure of pure Fe at room temperature?
FCC
BCC
HCP
FBC
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