Waste Water Engineering
Maximum permissible velocity 1.5 m/sec, is adopted in drains

With beds of rocks and gravels
Both A. and B.
Lined with stones
Neither A. nor B.

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Waste Water Engineering
In case of sewer lines

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

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