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Waste Water Engineering

Waste Water Engineering
The sewage is pumped up

From low lying areas
From basements
From flat areas
All listed here

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Waste Water Engineering
The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be

1.5 m
0.9 cm
1.2 m
> 1.5 m

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Waste Water Engineering
For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed

5 ppm
3 ppm
4 ppm
10 ppm

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Waste Water Engineering
When drainage to sewage ratio is 20, the peak dry weather flow is

None of these
20% of the design discharge
Slightly less than 5% of the design discharge
Slightly more than 5% of the design discharge

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Waste Water Engineering
No treatment of the sewage is given if dilution factor is

Between 200 to 300
More than 500
Less than 150
Between 150 to 200

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Waste Water Engineering
If the grit in grit chambers is 4.5 million litres per day, its cleaning is done

Manually
Mechanically
Hydraulically
Electrically

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