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Environmental Engineering in CE

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

Dissolved gases
None of these
Suspended solids
Dissolved solids

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Environmental Engineering in CE
Presence of iron and manganese in water causes

Discoloration of bathroom fixtures
Reduction in its dissolved oxygen content
None of these
Temporary hardness

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

Lime
Alum
Ferrous sulphate
Hydrazine

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Environmental Engineering in CE
Polyvinyl chloride containers are not suitable for storing

Foodstuffs
Metallic powder
None of these
Woolen clothes

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Environmental Engineering in CE
Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.

400
200
100
20

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Environmental Engineering in CE
Peroxyacyl nitrate (PAN), a pollutant is found in the

Exhaust of sulphuric acid plant
Exhaust of nitric acid plant
Flue gas of coal based power plant
Automobile exhaust

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