Chemical Engineering - Materials and Construction

6. 

Ceramic recuperators are generally made of

A. silicon carbide.
B. calcium carbide.
C. fireclay bricks.
D. high alumina bricks.

Answer: Option A

Explanation:

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7. 

Hammers and railway rails are normally made of

A. mild steel
B. dead mild steel
C. medium carbon steel
D. high carbon steel

Answer: Option D

Explanation:

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8. 

Softness of silver can be converted into hardness by alloying it with small quantity of

A. copper & nickel
B. zinc
C. aluminium
D. tin

Answer: Option A

Explanation:

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9. 

The addition of antimony in tin-based alloys improves its

A. rupture strength and hot hardness.
B. impact strength and bonding strength.
C. deformation resistance.
D. wear resistance.

Answer: Option C

Explanation:

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10. 

The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability ?

A. Lead
B. Copper
C. Aluminium
D. Wrought iron

Answer: Option A

Explanation:

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