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WASTE WATER ENGINEERING

Waste Water Engineering
For a continuous flow type of sedimentation tanks

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

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Waste Water Engineering
The use of coarse screens for the disposal of sewage, may be dispensed with by

Shredder
Both A and B
Comminutor
Neither A nor B

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Waste Water Engineering
In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time?

150 mm dia
All of these
225 mm dia
100 mm dia

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Waste Water Engineering
For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed

2.5
2
3
1.5

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Waste Water Engineering
For sewer mains of 0.5 to 1 m diameter, the ratio of maximum daily sewage flow to the average daily sewage flow is assumed

1.5
2
3
2.5

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