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Waste Water Engineering

Waste Water Engineering
Design period of 40 to 50 years is adopted for

Main sewers
All listed here
Trunk sewers
Branch sewers

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Waste Water Engineering
In sewers designed with self cleansing velocity,

Neither silting nor scouring occurs at the bottom
The bottom is silted
Both silting and scouring occur at the bottom
The bottom is scoured

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Waste Water Engineering
For trunk and out-fall, the type of sewers generally used, is

Standard egg shaped
Parabolic shaped
Circular shaped
Horse shoe shaped

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Waste Water Engineering
Sewer pipes need be checked for

Minimum flow
Both A and B
Maximum flow
None of these

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Waste Water Engineering
The sewer that unloads the sewage at the point of treatment is called

House sewer
Branch sewer
Outfall sewer
Main sewer

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Waste Water Engineering
If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is

4 hours
8 hours
6 hours
2 hours

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