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Mechanical Engineering - Engineering Materials

Exercise : Engineering Materials - Section 4
16.
When a low carbon steel is heated upto lower critical temperature,
there is no change in grain size
the average grain size is a minimum
the grain size increases very rapidly
the grain size first increases and then decreases very rapidly
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Grey cast iron is __________ than white cast iron.
softer
harder
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Corrosion resistance of steel is increased by adding nickel and chromium.
Agree
Disagree
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
The silicon steel is widely used for
connecting rods
cutting tools
generators and transformers in the form of laminated cores
motor car crankshafts
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Ball bearings are, usually, made from
low carbon steel
high carbon steel
medium carbon steel
chrome steel
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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