Waste Water Engineering
Hume steel pipes are

Steel shell coated from outside with cement mortar
Steel pipes
Steel shell coated from inside with cement mortar
Both B and C

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Waste Water Engineering
In case of sewer lines

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