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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

30 m
24 m
20 m
16 m

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Waste Water Engineering
For house drainage minimum gradient is

1 in 400
1 in 80
1 in 60
1 in 10

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Waste Water Engineering
Antisyphonage pipe is fitted

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

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Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, is

1.250 D
1.625 D
1.350 D
1.425 D

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Waste Water Engineering
The detention period for plain sedimentation water tanks, is usually

16 to 24 hours
8 to 16 hours
4 to 8 hours
24 to 36 hours

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Waste Water Engineering
The sludge does not contain waste water from

Kitchen sinks
Bath rooms
Toilets
Wash basins

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