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

Municipal sewage treatment
Iron & steel plant
Petroleum refinery
Food industry

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Environmental Engineering in CE
Smoke is produced due to

All of these
Poor quality of fuel and improper mixing of fuel & combustion air
Poor design & overloading of furnace
Insufficient supply of combustion air and insufficient time for combustion

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