Waste Water Engineering
depends upon The Chezy’s constant C in the formula V = C

Size of the sewer
All listed here
Shape of the sewer
Roughness of sewer surface

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

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

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