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Environmental Engineering in CE

Environmental Engineering in CE
The pH value of oxidised sewage is about

13.4
1.8
6.2
7.3

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

Lime
Hydrazine
Alum
Ferrous sulphate

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Environmental Engineering in CE
__________ is removed from water by lime-soda process.

Temporary hardness
Permanent hardness
Foul smell and taste
Iron and manganese

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Environmental Engineering in CE
Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of

CFC (chloro fluoro carbon)
SO₂
CO₂
Hydrocarbons

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Environmental Engineering in CE
Radioactive substances present in the polluted water stream can be removed by

Biological oxygen treatment
None of these
Adsorption in ion exchange materials
Coagulation and filtration

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Environmental Engineering in CE
Algae growth in water is controlled by

Deoxidation
Bleaching
Chlorination
Aeration

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MORE MCQ ON Environmental Engineering in CE

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