Damage to metal surface by mechanical action is called____________________?

Question: Out of the following, the most melleable material is
[A].

copper

[B].

aluminium

[C].

wrought iron

[D].

lead

Answer: Option D

Explanation:

No answer description available for this question.

Question: Addition of __________ to steel does not help in improving its machinability.
[A].

sulphur

[B].

silicon

[C].

lead

[D].

phosphorous

Answer: Option B

Explanation:

No answer description available for this question.

Question: Boiling point of water gets lowered at high altitudes (e.g., hills), because
[A].

temperature is low.

[B].

atmospheric pressure is low.

[C].

atmospheric pressure is high.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: A jet engine turbine blade is normally manufactured by
[A].

forging.

[B].

shell moulding.

[C].

investment casting.

[D].

pressure die casting.

Answer: Option C

Explanation:

No answer description available for this question.