Waste Water Engineering In the activated sludge process Sludge is activated by constant stirring Aeration is done with an admixture of previously aerated sludge Aeration is continued till stability Water is removed by centrifugal action Sludge is activated by constant stirring Aeration is done with an admixture of previously aerated sludge Aeration is continued till stability Water is removed by centrifugal action ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter Greater than 0.1 mm Less than 0.05 mm Less than 0.1 mm Less than 0.01 mm Greater than 0.1 mm Less than 0.05 mm Less than 0.1 mm Less than 0.01 mm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Dilution method of disposing of sewage, is not preferred to When sewage is fresh When the diluting water is having flow currents When diluting water has high dissolved oxygen content When diluting water is used for water supply near the point of sewage disposed When sewage is fresh When the diluting water is having flow currents When diluting water has high dissolved oxygen content When diluting water is used for water supply near the point of sewage disposed ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is 1.39 m 1.69 m 1.49 m 1.59 m 1.39 m 1.69 m 1.49 m 1.59 m ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The spacing of bars for perforations in coarse screens used for the treatment of sewage, is 50 mm 40 mm 20 mm 30 mm 50 mm 40 mm 20 mm 30 mm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The effluent of a septic tank is Fit for discharge into any open drain As good as that from a complete treatment None of these Foul and contains dissolved and suspended solids Fit for discharge into any open drain As good as that from a complete treatment None of these Foul and contains dissolved and suspended solids ANSWER DOWNLOAD EXAMIANS APP
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