Mechanical Engineering - Engineering Materials

21.
The property of a material essential for spring materials is
stiffness
ductility
resilience
plasticity
Answer: Option
Explanation:
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22.
A steel with carbon above 0.8% is known as hyper-eutectoid steel.
Agree
Disagree
Answer: Option
Explanation:
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23.
Which of the following material has nearly zero coefficient of expansion?
Stainless steel
High speed steel
Invar
Heat resisting steel
Answer: Option
Explanation:
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24.
In normalising process, the hypo-eutectiod steel is heated from 30° C to 50° C above the upper critical temperature and then cooled in still air.
True
False
Answer: Option
Explanation:
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25.
The alloying element which can replace tungsten in high speed steels is
nickel
vanadium
cobalt
molybdenum
Answer: Option
Explanation:
No answer description is available. Let's discuss.