Civil Engineering - Waste Water Engineering
Exercise : Waste Water Engineering - Section 4
6.
3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the DO. concentration was 5 mg/l. The BOD of raw sewerage is
7.
The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called
8.
The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is
9.
Imhoff cone is used to determine
10.
The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is
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