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Waste Water Engineering

Waste Water Engineering
A manhole is generally provided at each

All of these
Bend
Change of gradient
Junction

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Waste Water Engineering
In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is

D/3
D/2
D/1
D/4

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Waste Water Engineering
Antisyphonage pipe is fitted

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

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Waste Water Engineering
Hume steel pipes are

Steel shell coated from outside with cement mortar
Both B and C
Steel pipes
Steel shell coated from inside with cement mortar

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Waste Water Engineering
Disposal to sewage in large cities, is done in

Oxidation
Dilution
Irrigation
Purification

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Waste Water Engineering
The spacing of bars of perforations of fine screens used for the treatment of sewage, is

8 to 10 mm
5 to 8 mm
3 to 5 mm
2 to 3 mm

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