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Environmental Engineering in CE

Environmental Engineering in CE
The length of rectangular sedimentation tank should not be more than(Where ‘B’ is the width of the tank)

2B
4B
8B
B

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Environmental Engineering in CE
Reinglemann chart is used for the measurement of the

Exhaust gas density
Combustibles present in automobile exhaust
Smoke density from a chimey
Flue gas temperature

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Environmental Engineering in CE
Limestone powder is injected during pulverised coal burning in boilers to __________ the flue gases.

Catalytically convert SO₂ to SO₃ in
Increase the dew point of
None of these
Reduce SO₂ content in

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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'?

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

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Environmental Engineering in CE
Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)?

Carbon monoxide
Peroxyacyl nitrate
Sulphur dioxide
Benzopyrene

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Environmental Engineering in CE
The most commonly used chemical coagulant in water treatment is

Hydrazine
Alum
Ferrous sulphate
Lime

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