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Environmental Engineering in CE

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

Sulphur
Phosphorous
Calcium
Fluorine

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

None of these
Inorganic
Organic
Radioactive

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

Vibration damping
Tree plantation
Use of silencers
Green house gases

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Environmental Engineering in CE
Which of the following dust collection equipments is the least efficient (for sub-micronic particles)?

Hollow wet scrubber
Dust catcher (gravity type)
Bag filter
Cyclone separator

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Environmental Engineering in CE
Algae growth in water is controlled by

Chlorination
Aeration
Bleaching
Deoxidation

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Environmental Engineering in CE
Solid content in most of the domestic sewage is about __________ percent.

5
0.1
10
0.001

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