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Environmental Engineering in CE

Environmental Engineering in CE
The common pollutant generated in chlor-alkali industry and battery manufacture is

Brine
None of these
Mercury
Phosphate

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

Odour nuisances
Foaming
Turbidity
Undesirable plant growth

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Environmental Engineering in CE
As compared to rapid sand filters, slow sand filters give
(i) Slower filtration rate
(ii) Higher filtration rate
(iii) Lesser efficiency in removal of bacteria
(iv) Higher efficiency in removal of bacteria
The correct answer is

(ii) and (iii)
(ii) and (iv)
(i) and (iv)
(i) and (ii)

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Environmental Engineering in CE
The weakest sound that can be heard by a person in a quiet environment is equivalent to __________ decibel.

5
10
1
20

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Environmental Engineering in CE
Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas?

Hydrogen
Acetylene
Ammonia
Carbon monoxide

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Environmental Engineering in CE
During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.

Both B and C
Digestion
Sedimentation
Filtration

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MORE MCQ ON Environmental Engineering in CE

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