Waste Water Engineering
The clarigesters are

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

ANSWER DOWNLOAD EXAMIANS APP

Waste Water Engineering
The pressure exerted by

The internal pressure if any, causes tensile stress in the pipe material
All listed here
The sewage when running full from inside, is called internal pressure
Pressure sewers are designed to be safe in tension

ANSWER DOWNLOAD EXAMIANS APP