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Environmental Engineering

Environmental Engineering
The design discharge for the separate sewer system shall be taken as

2 × DWF
6 × DWF
3 × DWF
Equal to dry weather flow (DWF)

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Environmental Engineering
The biochemical treatment of sewage effluents is essentially a process of

Alkalinization
Dehydration
Reduction
Oxidation

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Environmental Engineering
If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to

Total hardness
Total alkalinity
Total hardness total alkalinity
Non carbonate hardness

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Environmental Engineering
The devices which are installed for drawing water from the sources are called

Aquiclude
Aquifers
Filters
Intakes

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Environmental Engineering
The ratio of 5 day BOD to ultimate BOD is about

43833
43894
1
43864

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Environmental Engineering
The water carriage system of collection of waste product

Is cheaper in initial cost than dry conservancy system
All of these
Requires treatment before disposal
Creates hygienic problem

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