Waste Water Engineering Skimming tanks are Improved version of grit chambers Those from which sludge is skimmed out Tanks provided with self- cleansing screens Used to remove the grease and oil Improved version of grit chambers Those from which sludge is skimmed out Tanks provided with self- cleansing screens Used to remove the grease and oil ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering 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 0.0556 cumec 0.05556 cumec 0.05552 cumec 0.05554 cumec 0.0556 cumec 0.05556 cumec 0.05552 cumec 0.05554 cumec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of Recovery Active decomposition Degradation Cleaner water Recovery Active decomposition Degradation Cleaner water ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Imhoff cone is used to measure Total in organic solids Total solids Settleable solids Total organic solids Total in organic solids Total solids Settleable solids Total organic solids ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is 50 mg/l 150 mg/l 100 mg/l 250 mg/l 50 mg/l 150 mg/l 100 mg/l 250 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In trickling filter, B.O.D. is reduced to 80 to 90% 60 to 80% 30 to 40% 40 to 60% 80 to 90% 60 to 80% 30 to 40% 40 to 60% ANSWER DOWNLOAD EXAMIANS APP
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