Imhoff cone is used to determine_____________________?
As compared to fresh river water, sea water contains oxygen_________________?
With self cleansing velocity in sewers___________________?
The ratio of depths at partial flo________________?
If the grit in grit chambers is 4.5 million litres per day, its cleaning is done____________________?
The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is________________________?
The gas evolved in sewers is________________?
In sewage, the solids in mg per litre is__________________?
If is the diameter of upper circular portion, the area of cross-section of a standard egg shaped sewer, is____________________?
The small sewers are cleaned by____________________?
