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Waste Water Engineering

Waste Water Engineering
The maximum diameter of sewers adopted in the designs is

4.0 m
3.0 m
1.0 m
2.0 m

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Waste Water Engineering
For a continuous flow type of sedimentation tanks

Length of the tank is normally kept 4 to 5 times the width
Width of the tank is normally kept about 6 m
Maximum horizontal flow velocity is limited to 0.3 m/minute
All listed here

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Waste Water Engineering
In 1000 kg of sewage, the total solids approximate

0.5 to 1.0 kg
7.5 kg to 10 kg
1 kg to 2.0 kg
5 kg to 7.5 kg

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

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

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Waste Water Engineering
For design purposes, the normal rate of infiltration of ground water into the sewer, is

1000 litres/km/cm
500 litres/km/cm
1500 litres/km/cm
2000 litres/km/cm

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Waste Water Engineering
If the pH value of sewage is 7

None of these
It is neutral
It is acidic
It is alkaline

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