Waste Water Engineering Self-cleansing velocity is Velocity of water in a pressure filter Velocity of water at flushing Velocity at which no accumulation remains in the drains Velocity at dry weather flow Velocity of water in a pressure filter Velocity of water at flushing Velocity at which no accumulation remains in the drains Velocity at dry weather flow ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is 100 ppm 200 ppm 150 ppm 50 ppm 100 ppm 200 ppm 150 ppm 50 ppm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient, Is only provided Is trebled Is doubled Is not enough Is only provided Is trebled Is doubled Is not enough ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The moisture content of sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is 0.1 0.25 0.5 0.05 0.1 0.25 0.5 0.05 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is D’ = 0.84 D D’ = 0.64 D D’ = 0.74 D D’ = 0.94 D D’ = 0.84 D D’ = 0.64 D D’ = 0.74 D D’ = 0.94 D ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The most effective arrangement for diverting excess storm water into a natural drainage, is Overflow weir Siphon spill way Leaping weir None of these Overflow weir Siphon spill way Leaping weir None of these ANSWER DOWNLOAD EXAMIANS APP
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