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Environmental Engineering in CE

Environmental Engineering in CE
Ethanolamine is an absorbant used for the removal of __________ from air/gas.

H₂S
SO₂
HF
Both B & C

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

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

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Environmental Engineering in CE
Which is a secondary air pollutant?

Nitrogen dioxide
Sulphur dioxide
Dust particles
Photochemical smog

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Environmental Engineering in CE
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.

Carbon dioxide
Ozone
None of these
Hydrogen

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

Hydrocarbons
Hydrogen sulphides
Nitrogen dioxide
Hydrogen flouride

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Environmental Engineering in CE
Lagooning process is mainly a means of the

Reduction of excessive flow in sewers
Sludge disposal
Biological treatment of wastes
None of these

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