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Environmental Engineering

Environmental Engineering
The pathogens can be killed by

None of these
Chlorination
Nitrification
Oxidation

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Environmental Engineering
Composting and lagooning are the methods of

Sludge digestion
Sedimentation
Filtration
Sludge disposal

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Environmental Engineering
Period of cleaning of slow sand filters is about

10 - 12 days
2 - 3 months
1 - 2 year
24 - 48 hours

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Environmental Engineering
As compared to shallow wells, deep wells have

Less depth
Less discharge
More depth
More discharge

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Environmental Engineering
The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally

More and less
Less and less
More and more
Less and more

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Environmental Engineering
Septic tank is a (i) Settling tank (ii) Digestion tank (iii) Aeration tank

(i) and (ii)
Only (i)
Only (iii)
(i) and (iii)

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