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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
None of these
Forest fire
Deforestation

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Environmental Engineering in CE
Removal of __________ results from the disinfection of water.

Hardness
Bacteria
Turbidity
Odour

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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

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

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Environmental Engineering in CE
Presence of soluble organics in polluted water causes

Undesirable plants growth
Fire hazards
Depletion of oxygen
Explosion hazards

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Environmental Engineering in CE
Siderosis is a disease caused by the inhalation of __________ dust.

None of these
Silica
Iron
Coal

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Environmental Engineering in CE
Noise level in a quiet private business office is about __________ decibels.

25
85
70
50

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