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Environmental Engineering in CE

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

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

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Environmental Engineering in CE
Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.

70
30
100
3

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Environmental Engineering in CE
Disinfection of water is done to remove

Bacteria
Foul odour
Color
Bad taste

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Environmental Engineering in CE
Peroxyacyl nitrate (PAN), a pollutant is found in the

Automobile exhaust
Exhaust of nitric acid plant
Exhaust of sulphuric acid plant
Flue gas of coal based power plant

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Environmental Engineering in CE
Water effluent generated in printing industry is decolourised by

Adsorption
Electrolytic decomposition
Reverse osmosis
Ion exchange technique

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Environmental Engineering in CE
Radioactive substances present in the polluted water stream can be removed by

None of these
Coagulation and filtration
Biological oxygen treatment
Adsorption in ion exchange materials

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