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Environmental Engineering in CE

Environmental Engineering in CE
Salt content in sea water is about __________ percent.

1
10
0.5
3.5

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Environmental Engineering in CE
Removal of __________ is accomplished by aeration of water.

Dissolved solids
None of these
Dissolved gases
Suspended solids

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Environmental Engineering in CE
Methyl iso-cynate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas.

Very extremely
Moderately
Extremely
Highly

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Environmental Engineering in CE
In water treatment, alum[Al2(SO₄)3] is used for the process of

Filtration
Coagulation
Disinfection
Sedimentation

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Environmental Engineering in CE
Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.

Hydrogen sulphides
Nitrogen dioxide
Hydrocarbons
Hydrogen flouride

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Environmental Engineering in CE
High noise level in a chemical plant can be controlled by the

Protection of operating personnel
Suppression of noise at the source itself
Path control of noise
All of these

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