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Environmental Engineering in CE

Environmental Engineering in CE
Foaming and priming in boiler operation can be reduced by reduction in __________ in feed water.

All of these
Turbidity
Total solids
Color (Hazen)

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Environmental Engineering in CE
__________ substances present in sewage are removed in grit chamber during sewage treatment.

Fatty
Inorganic
Dissolved
Organic

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Environmental Engineering in CE
Oil and grease present in an emulsified state in waste water discharged from industries can be removed by

Settling out using chemical reagents
Biological oxidation
Skimming off
Chlorination

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Environmental Engineering in CE
Which of the following is a green house gas other than CO₂ ?

Nitrous oxide
Chlorofluro carbons (CFC)
Methane
All of these

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Environmental Engineering in CE
Global warming may result in

All of these
Cyclone
Decrease in food productivity
Flood

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Environmental Engineering in CE
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.

Hydrogen
Ozone
None of these
Carbon dioxide

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