Waste Water Engineering
The clarigesters are

Circular Imhoff double tanks with bottom hoppers
Circular septic tanks
Circular Imhoff double storey tanks without bottom hoppers
Rectangular septic tanks

ANSWER DOWNLOAD EXAMIANS APP

Waste Water Engineering
In case of sewer lines

All listed here
Obstruction test is carried out with the help of smooth ball of diameter 13 mm
Water test is carried out to check water tightness of the joints
Test for straightness is carried out with the help of a lamp and mirror

ANSWER DOWNLOAD EXAMIANS APP