Waste Water Engineering
Rate of flow of sewage is generally assumed

More than the rate of water supply
At 150 litres per capita
Less than the rate of water supply
Equal to the rate of water supply

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Waste Water Engineering
Which one of the following statements regarding septic tanks is wrong?

A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided
The outlet invert level is kept 5 to 7.5 cm below the inlet invert level
The depth of tank is kept equal to its width
The minimum width of septic level is 90 cm

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