Chemical Engineering - Chemical Engineering Basics

11. 

When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is

A. cooled and dehumified.
B. heated and humidified.
C. cooled and humidified.
D. heated and dehumidified.

Answer: Option C

Explanation:

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12. 

The hardness of the lathe bed material is measured by the

A. shore sceleroscope.
B. Brinnel hardness tester.
C. Vicker's hardness tester.
D. Rockwell hardness tester.

Answer: Option A

Explanation:

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13. 

RADAR is

A. acronym for Radio Detection and Ranging.
B. name of technique for locating distant objects.
C. name of instrument for locating distant objects.
D. all (a), (b) & (c)

Answer: Option D

Explanation:

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14. 

In the floatation process, pine oil is used as the

A. collector
B. activator
C. frother
D. depressant

Answer: Option C

Explanation:

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15. 

With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.

A. impact strength
B. percent elongation
C. hardness
D. both 'b' & 'c'

Answer: Option A

Explanation:

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