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ENVIRONMENTAL ENGINEERING IN CE

Environmental Engineering in CE
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in

Iron & steel plant
Food industry
Municipal sewage treatment
Petroleum refinery

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Environmental Engineering in CE
Main pollutants released from petroleum refineries is

SO₃, NO₂ & CO₂
CO, SO₂ & H₂S
CO₂, NO & SO₃
CO₂, H₂S & NO₂

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Environmental Engineering in CE
Which is the most practical and economical method for removal of suspended solid matter from polluted water?

Chlorination
Biological oxidation
Skimming off
Sedimentation

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Environmental Engineering in CE
Color test of water is done with an instrument called

Turbidimeter
Tintometer
Electro-chemical cell
Colorimeter

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Environmental Engineering in CE
Presence of __________ in water stream are deleterious to aquatic life.

Heavy metals and cynides
Soluble and toxic organics
All of these
Suspended solids

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