Waste Water Engineering In the activated sludge process 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 Aeration is done with an admixture of previously aerated sludge Water is removed by centrifugal action Aeration is continued till stability ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is 250 ppm 200 ppm 225 ppm None of these 250 ppm 200 ppm 225 ppm None of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is 1 in 100 1 in 60 1 in 120 None of these 1 in 100 1 in 60 1 in 120 None of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Nitrogen cycle of sewage, is Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The sewer which resists sulphide corrosion, is Lead sewer Brick sewer R.C. sewer Cast iron sewer Lead sewer Brick sewer R.C. sewer Cast iron sewer ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The asbestos cement sewers are Susceptible to corrosion by sulphuric acid Not structurally strong to bear large compressive stress All of these Light in weight Susceptible to corrosion by sulphuric acid Not structurally strong to bear large compressive stress All of these Light in weight ANSWER DOWNLOAD EXAMIANS APP
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