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Environmental Engineering in CE

Environmental Engineering in CE
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.

140
170
200
120

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Environmental Engineering in CE
Which of the following is the most severe air pollutant?

SO₂
CO
Hydrocarbons
NOx

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Environmental Engineering in CE
Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the

Rain
Green house effect
Vegetation
Forestation

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Environmental Engineering in CE
Which of the following fine dust removal equipments is the most efficient?

Bag filter
Cyclone separator
Scrubber
Electrostatic precipitator

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Environmental Engineering in CE
In water chemical treatment plant, use of chloramines ensures

Removal of permanent hardness
Weed control in reservoirs
Disinfection
Taste & odour control

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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

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

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