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ENVIRONMENTAL ENGINEERING IN CE

Environmental Engineering in CE
Which of the following is an adsorbant for removal of nitrogen oxides from gas/air?

Active carbon
Bog iron (iron oxide)
Silica gel
Pulverised limestone

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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

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

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Environmental Engineering in CE
Which of the following is the most major constituents of air pollutants?

Oxides of sulphur
Oxides of nitrogen
Hydrogen sulphide
Carbon monoxide

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Environmental Engineering in CE
__________ plant emits large amount of SO₂ as an air pollutant.

Sulphuric acid
Nitric acid
Iron & steel
Chloralkali

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

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

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