Setting out the alignments of sewers may start from__________________?
The most widely used pump for lifting sewage is_________________?
Lead caulked joints are used for laying____________________?
If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is_____________________?
The pH value of fresh sewage is usually ______________________?
The spacing of bars for perforations in coarse screens used for the treatment of sewage, is ____________________?
The sewer pipes__________________?
The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?
The temperature affects the________________?
For large sewers, maximum distance between manholes may be_______________?
