Waste Water Engineering
‘Cowl’ is provided at

First step in manhole
Upper end of ventilating column
Upper end of the manhole
Lower end of ventilating column

ANSWER DOWNLOAD EXAMIANS APP

Waste Water Engineering
In septic tanks,

The clear space between the baffle top and covering slab is about 7.5 cm
The baffles or tees are extended up to top level of scum
Free board of 0.3 m may be provided
All listed here

ANSWER DOWNLOAD EXAMIANS APP