Chemical Engineering - Environmental Engineering

1. 

Most efficient and suitable dust removal equipment for removal of flyash from flue gas in a thermal power plant is the

A. gravity settling chamber
B. cyclone separator
C. electrostatic precipitator
D. bag filter

Answer: Option C

Explanation:

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2. 

Which of the following is not a secondary air pollutant ?

A. Ozone
B. Photochemical smog
C. Sulphur dioxide
D. All (a), (b) & (c)

Answer: Option C

Explanation:

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3. 

The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.

A. 1
B. 4
C. 8
D. 12

Answer: Option B

Explanation:

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4. 

The main industrial source of emission of hydrogen sulphide air pollutant is

A. petroleum refineries.
B. coal based thermal power plants.
C. pulp and paper plant.
D. metallurgical roasting & smelting plant.

Answer: Option B

Explanation:

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5. 

Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.

A. radioactive
B. organic
C. inorganic
D. none of these

Answer: Option C

Explanation:

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