Waste Water Engineering
With self cleansing velocity in sewers

Scouring occurs at bottom
Silting occurs at bottom
Both silting and scouring occur at bottom
Neither silting nor scouring occurs at bottom

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Waste Water Engineering
Hydraulic mean radius is

Cross-sectional area/wetted perimeter
Mean radius of sewer
Mean of radii in a pipe line of varying cross -sections
Difference in heads between two points in circular pipes

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Waste Water Engineering
In case of sewer lines

Obstruction test is carried out with the help of smooth ball of diameter 13 mm
Test for straightness is carried out with the help of a lamp and mirror
All listed here
Water test is carried out to check water tightness of the joints

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