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Environmental Engineering

Environmental Engineering
The detention period for oxidation ponds is usually kept as

48 hours
10 to 15 days
3 months
24 hours

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Environmental Engineering
The most common cause of acidity in water is

Carbon dioxide
Hydrogen
Oxygen
Nitrogen

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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
More and more
Less and more
Less and less

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Environmental Engineering
As compared to shallow wells, deep wells have

More depth
Less depth
Less discharge
More discharge

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Environmental Engineering
The pathogens can be killed by

Oxidation
None of these
Nitrification
Chlorination

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Environmental Engineering
Which of the following unit works in anaerobic conditions?

Sedimentation tank
Sludge digestion tank
Activated sludge treatment
Trickling filters

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