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Environmental Engineering in CE

Environmental Engineering in CE
During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.

Filtration
Both B and C
Sedimentation
Digestion

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Environmental Engineering in CE
Arsenic pollutant is not generated in____industries.

Tanneries
Any of these
Glass & ceramic
Beverages

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

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

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Environmental Engineering in CE
What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries?

None of these
Natural organic products
Radioactive substances
Inorganic pollutants

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

Hydrated lime
Chloramine
Aluminium sulphate
Ferrous sulphate

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Environmental Engineering in CE
There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.

6.5
15
0.05
1

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