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Waste Water Engineering

Waste Water Engineering
For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is

24 m
16 m
30 m
20 m

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Waste Water Engineering
A well oxidized sewage contains nitrogen mainly as

Free ammonia
Nitrates
Nitrites
None of these

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Waste Water Engineering
The discharge per unit plan area of a sedimentation tank, is generally called

Over flow velocity
Surface loading
Over flow rate
All of these

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Waste Water Engineering
If the diameter of sewer is 225 mm, the gradient required for generating self cleansing velocity, is

1 in 120
1 in 60
None of these
1 in 100

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Waste Water Engineering
An inverted siphon is designed generally for

Four pipes
Two pipes
Three pipes
One pipe

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Waste Water Engineering
Ventilating shafts are provided to a sewer line at every

200 m
300 m
100 m
150 m

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