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Waste Water Engineering

Waste Water Engineering
Are available in size Stoneware sewers

15 cm
10 cm
20 cm
All of these

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Waste Water Engineering
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 D.O. concentration was 5 mg/l. The BOD of raw sewerage is

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

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Waste Water Engineering
Before discharging the foul sewage into rivers, it is generally treated by

Screening
Oxidation
Sedimentation
All listed here

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Waste Water Engineering
A rain sanitary sewer is constructed to carry

Sanitary sewage
Ground water
Surface water
Storm sewage

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Waste Water Engineering
The intensity of rain is expressed in

cm/minute
cm/hour
cm/day
None of these

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Waste Water Engineering
Fresh sewage is generally

A source of objectionable odour
Alkaline
Acidic
Highly decomposed

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