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Environmental Engineering in CE

Environmental Engineering in CE
Lagooning process is mainly a means of the

Sludge disposal
None of these
Reduction of excessive flow in sewers
Biological treatment of wastes

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Environmental Engineering in CE
Particles having diameter greater than 75 μm (micrometer = 10-6 mm) are called

Powder
Dust
Smoke
Grit

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Environmental Engineering in CE
Which of the following is the most major constituents of air pollutants?

Carbon monoxide
Hydrogen sulphide
Oxides of nitrogen
Oxides of sulphur

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Environmental Engineering in CE
__________ plant emits large amount of SO₂ as an air pollutant.

Chloralkali
Nitric acid
Sulphuric acid
Iron & steel

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Environmental Engineering in CE
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in

Petroleum refinery
Iron & steel plant
Food industry
Municipal sewage treatment

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Environmental Engineering in CE
Presence of dissolved impurities of __________ is responsible for the red brownish color of water.

Bi-carbonates
Carbonates
Iron & manganese
Arsenic

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