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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following pollutants is absent in the emissions from a fertiliser plant ?

SO₂ & SO₃
CO
NH₃
NO₂

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Environmental Engineering in CE
The function of skimming tank in sewage treatment is to remove __________ substances.

Suspended solid
Oil & fatty
Gritty & inorganic
Dissolved solid

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Environmental Engineering in CE
World's worst radioactive pollution was caused by nuclear reactor disaster which occured in

Pensylvania (U.S.A.)
Arizona (U.S.A.)
Moscow (U.S.S.R.)
Chernobyl (undivided U.S.S.R.)

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Environmental Engineering in CE
Siderosis is a disease caused by the inhalation of __________ dust.

Silica
None of these
Coal
Iron

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Environmental Engineering in CE
Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre)?

Lagooning
Chemical coagulation
Activated carbon adsorption
Biological oxidation pond

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Environmental Engineering in CE
Infective bacteria in water is killed by the __________ process.

Aeration
Disinfection
None of these
Sterilisation

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