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Waste Water Engineering

Waste Water Engineering
The recommended detention period for grit chambers is

1 minute
3 minutes
5 minutes
2 minutes

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Waste Water Engineering
You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at

Full depth
Three fourth full
Half full
Two third full

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Waste Water Engineering
In SI units the power of sound is represented in

Kgs
Joules
Newtons
Watts

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Waste Water Engineering
The sewerage system originates from

Branch sewers
Lateral sewers
Main sewers
House sewers

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Waste Water Engineering
The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is

0.05552 cumec
0.05554 cumec
0.0556 cumec
0.05556 cumec

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Waste Water Engineering
If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is

225 ppm
250 ppm
None of these
200 ppm

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