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Environmental Engineering in CE

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

Digestion
Filtration
Sedimentation
Both B and C

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Environmental Engineering in CE
World environment day is observed every year on the 5th of

June
December
July
September

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Environmental Engineering in CE
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?

Cruising
Acceleration
Idle running
Deaccelaration

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Environmental Engineering in CE
Noise level in a quiet private business office is about __________ decibels.

70
50
25
85

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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
Smoke & fumes
Photochemical smog & soot

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Environmental Engineering in CE
Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of

Hydrocarbons
SO₂
CO₂
CFC (chloro fluoro carbon)

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