Waste Water Engineering
Dilution method of disposing of sewage, is not preferred to

When sewage is fresh
When the diluting water is having flow currents
When diluting water is used for water supply near the point of sewage disposed
When diluting water has high dissolved oxygen content

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

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