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Waste Water Engineering

Waste Water Engineering
The sewage treatment in septic tanks is due to

Aerobic decomposition
Anaerobic decomposition
Parasitic decomposition
None of these

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Waste Water Engineering
In a trickling filter

Neither A nor B
Filtration process is used
Biological action is used
Both A and B

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Waste Water Engineering
Pick up the incorrect size of stone ware sewers

None of these
82.5 cm
67.5 cm
52.5 cm

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Waste Water Engineering
Drop manholes are the manholes

With depths more than 3.5 m
Without entry ladders
Without manhole covers
Having drains at different levels

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Waste Water Engineering
For sewers, inverted siphon is provided for

Three pipes
Two pipes
Four pipes
One pipe

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Waste Water Engineering
To prevent settling down of sewage both at the bottom and on the sides of a large sewer, self-cleaning velocity recommended for Indian conditions, is

0.75 m/sec
0.70 m/sec
0.50 m/sec
0.60 m/sec

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