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Waste Water Engineering

Waste Water Engineering
The drop man holes are generally provided in sewers for

Cities in plains
Large town ships
Industrial areas
Hilly town ships

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Waste Water Engineering
The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is

0.68 m
0.88 m
1.36 m
1.76 m

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Waste Water Engineering
The algae dies out in the zone of

Active decomposition
Cleaner water
Degradation
Recovery

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Waste Water Engineering
For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed

3
2
1.5
2.5

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Waste Water Engineering
Aerobic bacterias

All of these
Flourish in the presence of free oxygen
Oxidise organic matter in sewage
Consume organic matter as their food

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Waste Water Engineering
The sewer which transports the sewage to the point of treatment, is called

Out-fall sewer
House sewer
Main sewer
Branch sewer

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MORE MCQ ON Waste Water Engineering

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