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Environmental Engineering in CE

Environmental Engineering in CE
Lagooning process is mainly a means of the

None of these
Reduction of excessive flow in sewers
Biological treatment of wastes
Sludge disposal

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Environmental Engineering in CE
The earth's atmosphere is an envelope of gases present upto a height of about __________ kms.

2000
200
1000
10

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Environmental Engineering in CE
Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by

Treating in biological oxygen pond
Chlorination
Chemical coagulation
None of these

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

Colorimeter
Tintometer
Turbidimeter
Electro-chemical cell

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Environmental Engineering in CE
Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes

Foaming
Undesirable plant growth
Turbidity
Odour nuisances

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Environmental Engineering in CE
__________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.

Phosphorous
Fluorine
Sulphur
Calcium

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