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 For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is 18 cm 12 cm 10 cm 15 cm 18 cm 12 cm 10 cm 15 cm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is 1 in 120 None of these 1 in 100 1 in 60 1 in 120 None of these 1 in 100 1 in 60 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Oxidation process results in the formation of Nitrates Sulphates Carbon dioxide All of these Nitrates Sulphates Carbon dioxide All of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering No treatment of the sewage is given if dilution factor is Less than 150 More than 500 Between 200 to 300 Between 150 to 200 Less than 150 More than 500 Between 200 to 300 Between 150 to 200 ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time? 225 mm dia All of these 150 mm dia 100 mm dia 225 mm dia All of these 150 mm dia 100 mm dia ANSWER DOWNLOAD EXAMIANS APP
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