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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following pollutants is absent in the emissions from a fertiliser plant ?

SO₂ & SO₃
NH₃
CO
NO₂

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Environmental Engineering in CE
TLV of lead for public sewer/waste water is about __________ ppm.

25
650
150
1

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Environmental Engineering in CE
Water effluent generated in printing industry is decolourised by

Ion exchange technique
Reverse osmosis
Adsorption
Electrolytic decomposition

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Environmental Engineering in CE
Pick out the one which is not a chemical coagulant.

Ferrous sulphate
Chloramine
Hydrated lime
Aluminium sulphate

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Environmental Engineering in CE
Reingleman chart No. 2 corresponds to __________ percent black smoke.

80
10
20
40

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

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

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