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Waste Water Engineering

Waste Water Engineering
The ratio of the diameter of a circular section and the side of a square section hydraulically equivalent, is

1.075
1.095
1.085
1.065

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Waste Water Engineering
For efficient working of a sewer, it must be ensured that

Both (A) and (B)
Minimum velocity of 0.45 m/sec, is maintained at its minimum flow
A maximum velocity of 0.90 m/sec, is maintained at its maximum flow
Neither (A) nor (B)

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Waste Water Engineering
The ratio of maximum sewage flow to average sewage flow for mains up to 1 m in diameter, is

4
3
1.5
2

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Waste Water Engineering
If the side of a square sewer is 1000 mm, the diameter of a hydraulically equivalent circular section, is

1095 mm
1075 mm
1045 mm
1065 mm

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Waste Water Engineering
Antisyphonage pipe is fitted

At the end of septic tanks
On manholes
At the beginning of sewer line
With a W.'trap

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Waste Water Engineering
A sewer running partially full and hurried with back filled, fails in compression due to

Weight of the back fill
Superimposed traffic loads
All listed here
Weight of the pipe

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