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Environmental Engineering in CE

Environmental Engineering in CE
__________ is removed from water by lime-soda process.

Temporary hardness
Iron and manganese
Permanent hardness
Foul smell and taste

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Environmental Engineering in CE
Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?

Sulphur dioxide & spray of weed killers
Smog & ozone
Hydrogen fluoride & nitrogen oxides
Carbon monoxide

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Environmental Engineering in CE
__________ is the process of killing organism in water.

Sterilisation
Sedimentation
Coagulation
Disinfection

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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?

Inorganic pollutants
Radioactive substances
Natural organic products
None of these

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Environmental Engineering in CE
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the

Global warming
Atmospheric effect
Ionosphere
Green house

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Environmental Engineering in CE
Which of the following is not a secondary air pollutant?

All of these
Sulphur dioxide
Photochemical smog
Ozone

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