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Waste Water Engineering

Waste Water Engineering
The sewerage system originates from

Lateral sewers
House sewers
Branch sewers
Main sewers

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Waste Water Engineering
A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is

2.50 m
2.40 m
2.30 m
2.45 m

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Waste Water Engineering
The flow velocity in detritus tanks is

1.25 m/sec
None of these
0.05 m/sec
0.09 m/sec

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Waste Water Engineering
If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is

400 mg/l
200 mg/l
100 mg/l
300 mg/l

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Waste Water Engineering
Rate of flow of sewage is generally assumed

At 150 litres per capita
More than the rate of water supply
Less than the rate of water supply
Equal to the rate of water supply

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Waste Water Engineering
The small sewers are cleaned by

Flushing
Wooden pills
Cane rodding
None of these

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