Mechanical Engineering - Engineering Materials

26. 

The malleability is the property of a material due to which it can be rolled or hammered into thin sheets.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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27. 

The process of inducing carbon to __________ carbon steels in order to give it a hard surface is known as carburising.

A. low
B. medium
C. high

Answer: Option A

Explanation:

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28. 

Which of the following solids are malleable and ductile?

A. Ionic solids
B. Covalent solids
C. Metallic solids
D. none of these

Answer: Option C

Explanation:

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29. 

The delta-iron possesses a body centred cubic space lattice.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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30. 

Thermosetting plastics are those materials which

A. are formed into shape under heat and pressure and results in a permanently hard product
B. do not become hard with the application of heat and pressure and no chemical change occurs
C. are flexible and can withstand considerable wear under suitable conditions
D. are used as a friction lining for clutches and brakes

Answer: Option A

Explanation:

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