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Environmental Engineering in CE

Environmental Engineering in CE
The principal gas evolved from sludge digestion tank is

CO₂
CO
N₂
CH₄

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Environmental Engineering in CE
Arsenic pollutant is not generated in____industries.

Any of these
Tanneries
Beverages
Glass & ceramic

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

None of these
Silica
Coal
Iron

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Environmental Engineering in CE
The most commonly used chemical coagulant in water treatment is

Ferrous sulphate
Alum
Hydrazine
Lime

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Environmental Engineering in CE
Brown spots in fabrics will be caused by washing with water containing large amount of .

Iodine
Bromine
Zinc
Iron

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Environmental Engineering in CE
What are the methods of treatment & disposal of radioactive wastes?

Fixing into a solid mass with cement and sinking deep in the sea
Evaporation & chemical precipitation
All of these
Biological methods & adsorption in ion exchange materials

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