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Waste Water Engineering

Waste Water Engineering
The sewerage system originates from

Lateral sewers
Main sewers
Branch sewers
House sewers

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Waste Water Engineering
For a continuous flow type of sedimentation tanks

Length of the tank is normally kept 4 to 5 times the width
Width of the tank is normally kept about 6 m
Maximum horizontal flow velocity is limited to 0.3 m/minute
All listed here

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Waste Water Engineering
Sewer manholes are generally provided at

The change of direction
The change of gradient
All of these
The junctions of sewers

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Waste Water Engineering
The screens are fixed

Perpendicular to the direction of flow
At an angle 30° to 60° to the direction of flow
Parallel to the direction of flow
None of these

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Waste Water Engineering
The rational formula for peak drainage discharge, was evolved by

Kuichling
Lloyd David
All of these
Fruhling

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Waste Water Engineering
In a grit chamber of a sewage treatment plant,

Flow velocity 0.15 m to 0.3 m/sec is kept
One minute of detention period is kept
Depth of 0.9 m to 1.20 m is kept
All of these

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