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 50 mg/l 250 mg/l 150 mg/l 100 mg/l 50 mg/l 250 mg/l 150 mg/l 100 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Antisyphonage pipe is fitted On manholes At the end of septic tanks With a W.'trap At the beginning of sewer line On manholes At the end of septic tanks With a W.'trap At the beginning of sewer line ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called Windrow A heap Plateau None of these Windrow A heap Plateau None of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For efficient working of a sewer, it must be ensured that Neither (A) nor (B) Minimum velocity of 0.45 m/sec, is maintained at its minimum flow A maximum velocity of 0.90 m/sec, is maintained at its maximum flow Both (A) and (B) Neither (A) nor (B) Minimum velocity of 0.45 m/sec, is maintained at its minimum flow A maximum velocity of 0.90 m/sec, is maintained at its maximum flow Both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known None of these Bio-Chemical Oxygen Demand (B.O.D.) Dissolved Oxygen (D.O.) Chemical Oxygen Demand (C.O.D.) None of these Bio-Chemical Oxygen Demand (B.O.D.) Dissolved Oxygen (D.O.) Chemical Oxygen Demand (C.O.D.) ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Maximum permissible velocity 1.5 m/sec, is adopted in drains With beds of rocks and gravels Both A. and B. Lined with stones Neither A. nor B. With beds of rocks and gravels Both A. and B. Lined with stones Neither A. nor B. ANSWER DOWNLOAD EXAMIANS APP
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