Waste Water Engineering
Aerobic bacterias

Oxidise organic matter in sewage
Flourish in the presence of free oxygen
All of these
Consume organic matter as their food

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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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