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Environmental Engineering in CE

Environmental Engineering in CE
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.

None of these
Radioactive
Organic
Inorganic

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Environmental Engineering in CE
__________ can not control the noise pollution.

Green house gases
Vibration damping
Use of silencers
Tree plantation

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Environmental Engineering in CE
Dissolved oxygen content in river water is around __________ ppm.

100
500
5
250

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

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

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Environmental Engineering in CE
Which of the following is a secondary air pollutant?

Photochemical smog
Nitrogen dioxide
Dust particles
Sulphur dioxide

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Environmental Engineering in CE
Biological oxidation ponds remove organic matters present in the polluted water by

Both A & B
Neither A nor B
Using the activities of bacteria and other micro organisms
Aerobic oxidation

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