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Environmental Engineering in CE

Environmental Engineering in CE
Which of the following acts as a natural source of air pollution?

Volcanic eruption
Forest fire
None of these
Deforestation

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Environmental Engineering in CE
The biological decomposition of organic substances in wastes controlled conditions is called

Composting
Biological oxidation
Incineration
None of these

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Environmental Engineering in CE
Soluble silica present in boiler feed water can be removed by

Anion exchanger
Preheating it
Coagulation
Filtration

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Environmental Engineering in CE
Insufficient washing of sand grains in a rapid sand filter causes

Expansion of filtering media
Shrinkage of filtering media
Air binding
Mud balls

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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
Sulphur
Calcium
Fluorine

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Environmental Engineering in CE
TLV of aldrin in public water supply system is about __________ μg/litre.

17
357
1097
0.5

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