Waste Water Engineering 3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is 200 mg/l 100 mg/l 300 mg/l 400 mg/l 200 mg/l 100 mg/l 300 mg/l 400 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The maximum depth of sedimentation tanks, is kept 4 m 3 m 4.5 m 3.5 m 4 m 3 m 4.5 m 3.5 m ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The gas which may cause explosion in sewers, is Carbon monoxide Carbondioxide Ammonia Methane Carbon monoxide Carbondioxide Ammonia Methane ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Sewer ventilating columns are generally placed at Upper ends of branch sewers Every change in the size of sewers Distances 150 m to 300 m All listed here Upper ends of branch sewers Every change in the size of sewers Distances 150 m to 300 m All listed here ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Dilution method of disposing of sewage, is not preferred to When diluting water is used for water supply near the point of sewage disposed When sewage is fresh When diluting water has high dissolved oxygen content When the diluting water is having flow currents When diluting water is used for water supply near the point of sewage disposed When sewage is fresh When diluting water has high dissolved oxygen content When the diluting water is having flow currents ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is 1 in 120 1 in 60 None of these 1 in 100 1 in 120 1 in 60 None of these 1 in 100 ANSWER DOWNLOAD EXAMIANS APP
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