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Environmental Engineering

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

Aquiclude
Filters
Aquifers
Intakes

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

Equal to rainfall
Rainfall + 6 DWF
Rainfall + 2 DWF
Rainfall + DWF

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Environmental Engineering
The velocity of flow does not depend on

Hydraulic mean depth of sewer
Length of sewer
Roughness of sewer
Grade of sewer

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

43864
43833
43894
1

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Environmental Engineering
The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is

10 ppm
4 ppm
40 ppm
1 ppm

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Environmental Engineering
The suitable method of forecasting population for a young and rapidly increasing city is

Arithmetical increase method
Graphical method
Incremental increase method
Geometrical increase method

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