Waste Water Engineering For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is 15 cm 18 cm 10 cm 12 cm 15 cm 18 cm 10 cm 12 cm ANSWER DOWNLOAD EXAMIANS APP
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 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 100 mg/l 200 mg/l 400 mg/l 300 mg/l 100 mg/l 200 mg/l 400 mg/l 300 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed 3 1.5 2.5 2 3 1.5 2.5 2 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The pH value of fresh sewage is usually More than 7 Equal to 7 Equal to zero Less than 7 More than 7 Equal to 7 Equal to zero Less than 7 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Large diameter sewers subjected to external pressure alone, are reinforced Near the outer surface of the pipe Near the inner surface of the pipe With elliptical cage Both A and B Near the outer surface of the pipe Near the inner surface of the pipe With elliptical cage Both A and B ANSWER DOWNLOAD EXAMIANS APP
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