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Environmental Engineering in CE

Environmental Engineering in CE
Main pollutants released from iron & steel industry is

H₂S, NO & SO₃
CO₂, H₂S & NO₂
CO, CO₂ & SO₂
SO₃, NO₂ & CO₂

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Environmental Engineering in CE
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.

Organic
None of these
Radioactive
Inorganic

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Environmental Engineering in CE
Radioactive solid nuclear wastes are disposed off by

Pyrolysis
Pathological incineration
Underground burial in concrete containers
High temperature incineration

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Environmental Engineering in CE
Which of the following processes is involved in the biochemical treatment of sewage effluents?

Fermentation
Reduction
Dehydration
Oxidation

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

40
10
20
80

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Environmental Engineering in CE
In a sedimentation tank, the detention period for water ranges from __________ hours.

8 to 12
16 to 20
24 to 32
2 to 4

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