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Environmental Engineering in CE

Environmental Engineering in CE
Smog is not formed due to the presence of __________ in the atmosphere.

NOx
Any of these
SO₂
CO₂

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Environmental Engineering in CE
COD of raw municipal sewage may be in the range of about __________ mg/litre.

90-120
1-2
5-10
1500-2500

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Environmental Engineering in CE
Higher concentration of nitrogen dioxide in atmospheric air causes

Bronchitis
Asphyxiation
Cancer
Corrosion

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Environmental Engineering in CE
The principal gas evolved from sludge digestion tank is

CO
N₂
CH₄
CO₂

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Environmental Engineering in CE
Noise pollution level in a chemical plant is expressed in

Decibel
Roentgen
None of these
Hertz

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

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