If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is__________________?
To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of_______________?
The sewer which transports the sewage to the point of treatment, is called________________?
If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains__________________?
The ratio of minimum hourly flow to the average flow of sewage is_________________?
Removal of oil and grease from sewage, is known____________________?
The gradient of sewers depends upon_________________?
The standard B.O.D. of water is taken for_________________?
Fresh sewage may become stale in_________________?
The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is____________________?
