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

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

ANSWER DOWNLOAD EXAMIANS APP