Waste Water Engineering
For design purposes, the normal rate of infiltration of ground water into the sewer, is

1000 litres/km/cm
1500 litres/km/cm
2000 litres/km/cm
500 litres/km/cm

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Waste Water Engineering
The pressure exerted by

All listed here
The sewage when running full from inside, is called internal pressure
Pressure sewers are designed to be safe in tension
The internal pressure if any, causes tensile stress in the pipe material

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