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 100 mg/l 250 mg/l 150 mg/l 50 mg/l 100 mg/l 250 mg/l 150 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In trickling filter, B.O.D. is reduced to 40 to 60% 80 to 90% 60 to 80% 30 to 40% 40 to 60% 80 to 90% 60 to 80% 30 to 40% ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering A circular sewer section is preferred to because All listed here It provides maximum area for a given perimeter It is cheaper in construction It provides maximum hydraulic mean depth All listed here It provides maximum area for a given perimeter It is cheaper in construction It provides maximum hydraulic mean depth ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is 0.68 m 1.36 m 1.76 m 0.88 m 0.68 m 1.36 m 1.76 m 0.88 m ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For house drainage minimum gradient is 1 in 10 1 in 80 1 in 400 1 in 60 1 in 10 1 in 80 1 in 400 1 in 60 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for Unexpected increase in the population Under estimates of maximum and average flows All of these Unexpected large scale infiltration of stream water Unexpected increase in the population Under estimates of maximum and average flows All of these Unexpected large scale infiltration of stream water ANSWER DOWNLOAD EXAMIANS APP
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