Mechanical Engineering - Engineering Materials

41. 

Which of the following material has maximum malleability?

A. Lead
B. Soft steel
C. Wrought iron
D. Copper

Answer: Option A

Explanation:

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42. 

Nichrome contains more iron than Inconel.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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43. 

Hardness of steel is increased by adding sulphur, lead and phosphorus.

A. Yes
B. No

Answer: Option B

Explanation:

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44. 

German silver contains

A. 70% copper and 30% zinc
B. 60% copper and 40% zinc
C. 59% copper, 40% zinc and 1% tin
D. 60.45% copper, 35.2% zinc and 5.35% nickel

Answer: Option D

Explanation:

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45. 

The machine tool guide ways are usually hardened by

A. vacuum hardening
B. martempering
C. induction hardening
D. flame hardening

Answer: Option D

Explanation:

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