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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

Food industry
Iron & steel plant
Municipal sewage treatment
Petroleum refinery

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Environmental Engineering in CE
Main pollutants released from petroleum refineries is

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

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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?

Sedimentation
Skimming off
Chlorination
Biological oxidation

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

Electro-chemical cell
Colorimeter
Tintometer
Turbidimeter

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

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

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