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Waste Water Engineering

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

0.88 m
1.36 m
0.68 m
1.76 m

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Waste Water Engineering
If the over land flow from the critical point to the drain is 8 km and the difference in level is 12.4 m, the inlet time is

4 hours
5 hours
3 hours
2 hours

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Waste Water Engineering
The following is the physical characteristic of sewage

Odour
Colour
All listed here
Turbidity

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Waste Water Engineering
R.M.O. expenses include

Running expenses
All of these
Maintenance expenses
Operation expenses

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Waste Water Engineering
In detritus tanks,

All listed here
Flow velocity is kept 0.09 m/sec
Organic and inorganic materials are separated
Detention period is kept 3 to 4 minutes

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Waste Water Engineering
In sewers designed with self cleansing velocity,

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

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