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Mechanical Engineering - Engineering Materials

Exercise : Engineering Materials - Section 2
11.
Which of the following statement is true about brittle fracture?
High temperature and low strain rates favour brittle fracture
Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture
Brittle fracture is always preceded by noise
Cup and cone formation is characteristic for brittle materials
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Grey cast iron has
carbon in the form of free graphite
high tensile strength
low compressive strength
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Induction hardening is basically a
carburising process
surface hardening process
core-hardening process
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces
white cast iron
nodular cast iron
malleable cast iron
alloy cast iron
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
The strength is the ability of a material to resist
deformation under stress
externally applied forces with breakdown or yielding
fracture due to high impact loads
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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