Waste Water Engineering
In case of Imhoff tanks,

All of these
The velocity of flow is restricted to 0.30 m/minute
Detention period is 2 hours
The shape is rectangular

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Waste Water Engineering
In case of sewer lines

All listed here
Water test is carried out to check water tightness of the joints
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

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