Chemical Engineering - Environmental Engineering

1. 

Smog is

A. nothing but black smoke.
B. a combination of smoke and fog.
C. a liquid particle resulting from vapor condensation.
D. a solid particle e.g. flyash.

Answer: Option B

Explanation:

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2. 

__________ is the process of killing organism in water.

A. Coagulation
B. Sterilisation
C. Disinfection
D. Sedimentation

Answer: Option C

Explanation:

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3. 

Reingleman chart No. 2 corresponds to __________ percent black smoke.

A. 10
B. 20
C. 40
D. 80

Answer: Option C

Explanation:

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4. 

Which of the following is a manmade source of air pollution ?

A. Automobile exhaust.
B. Forest fire.
C. Bacterial action in soil and swamp areas
D. All (a), (b) and (c).

Answer: Option A

Explanation:

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5. 

Which is the most efficient dust removal equipment for removal of sub-micronic dust particles from blast furnace gas ?

A. Packed scrubber
B. Gravity settling chamber
C. Electrostatic precipitator
D. Hydrocyclone

Answer: Option C

Explanation:

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