Waste Water Engineering To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of Sulphuric acid Hydrochloric acid Nitric acid Citric acid Sulphuric acid Hydrochloric acid Nitric acid Citric acid ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is 1.5 D 1.15 D 1.75 D 1.25 D 1.5 D 1.15 D 1.75 D 1.25 D ANSWER DOWNLOAD EXAMIANS APP
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 400 mg/l 300 mg/l 100 mg/l 200 mg/l 400 mg/l 300 mg/l 100 mg/l 200 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In detritus tanks, Detention period is kept 3 to 4 minutes Flow velocity is kept 0.09 m/sec All listed here Organic and inorganic materials are separated Detention period is kept 3 to 4 minutes Flow velocity is kept 0.09 m/sec All listed here Organic and inorganic materials are separated ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Sewer pipes are designed for maximum discharge with 25% to 33% vacant cross-sectional area for Unexpected large scale infiltration of stream water All of these Unexpected increase in the population Under estimates of maximum and average flows Unexpected large scale infiltration of stream water All of these Unexpected increase in the population Under estimates of maximum and average flows ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is 2 hours 1 hour 1 hour and 30 minutes 30 minutes 2 hours 1 hour 1 hour and 30 minutes 30 minutes ANSWER DOWNLOAD EXAMIANS APP
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