Chemical Engineering - Chemical Engineering Basics

6. 

In continuous casting process, graphite moulds are used with a view to providing

A. heat resisting medium.
B. self lubricating qualities.
C. non-wetting surfaces.
D. chilling effect.

Answer: Option B

Explanation:

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7. 

Energy required to compress a hot gas as compared to cold gas will be

A. more.
B. less.
C. same.
D. more or less depending upon the nature of the gas.

Answer: Option A

Explanation:

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8. 

In the commercial production of which of the following metals, matallothermic reduction is used ?

A. Copper
B. Zinc
C. Zirconium
D. Nickel

Answer: Option B

Explanation:

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9. 

New water wells are disinfected with chlorine in the form of

A. sodium chloride
B. sodium hypochlorate
C. bleaching powder
D. aluminium chloride

Answer: Option C

Explanation:

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10. 

In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will

A. decrease gradually.
B. increase gradually.
C. increase rapidly.
D. remain constant.

Answer: Option B

Explanation:

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