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Environmental Engineering in CE

Environmental Engineering in CE
Water filtration rate in a rapid sand filter ranges from __________ kilolitres/m²/hr.

15 to 20
0.1 to 1
3 to 6
10 to 15

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Environmental Engineering in CE
In water treatment, alum[Al2(SO₄)3] is used for the process of

Disinfection
Coagulation
Sedimentation
Filtration

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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?

Radioactive substances
None of these
Natural organic products
Inorganic pollutants

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Environmental Engineering in CE
'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?

Smoke & fumes
Photochemical smog & soot
None of these
Dust & mists

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Environmental Engineering in CE
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as

Benzopyrene
Poly acrylonitrile
Peroxy acetyl nitrate (PAN) or methyl nitrile
Photochemical smog

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Environmental Engineering in CE
'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

Automobiles exhaust
Photochemical reaction in polluted atmosphere
Burning of domestic fuel
Industrial chimney exhaust

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