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 150 mg/l 100 mg/l 50 mg/l 250 mg/l 150 mg/l 100 mg/l 50 mg/l 250 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The pH value of fresh sewage is usually Less than 7 Equal to zero More than 7 Equal to 7 Less than 7 Equal to zero More than 7 Equal to 7 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Which one of the following statements regarding septic tanks is wrong? The outlet invert level is kept 5 to 7.5 cm below the inlet invert level The depth of tank is kept equal to its width A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided The minimum width of septic level is 90 cm The outlet invert level is kept 5 to 7.5 cm below the inlet invert level The depth of tank is kept equal to its width A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided The minimum width of septic level is 90 cm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Inter-distance between ventilation columns in a sewer line is kept 25 to 50 m 100 m to 150 m 50 m to 100 m 150 m to 300 m 25 to 50 m 100 m to 150 m 50 m to 100 m 150 m to 300 m ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For estimating the peak run off the rational formula Q = 0.0278 KpA was evolved by Frubling Kinchling Lloyd Davis All listed here Frubling Kinchling Lloyd Davis All listed here ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In the activated sludge process Aeration is done with an admixture of previously aerated sludge Water is removed by centrifugal action Aeration is continued till stability Sludge is activated by constant stirring Aeration is done with an admixture of previously aerated sludge Water is removed by centrifugal action Aeration is continued till stability Sludge is activated by constant stirring ANSWER DOWNLOAD EXAMIANS APP
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