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Waste Water Engineering

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

1.350 D
1.250 D
1.425 D
1.625 D

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Waste Water Engineering
To maintain aerobic biological activity, the moisture content of the compost mass should be about

0.6
0.55
0.45
0.5

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Waste Water Engineering
Large diameter sewers subjected to external pressure alone, are reinforced

Both A and B
With elliptical cage
Near the outer surface of the pipe
Near the inner surface of the pipe

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Waste Water Engineering
The liquid wastes from kitchens, bath rooms and wash basins, is not called

Liquid waste
Sewage
None of these
Sullage

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Waste Water Engineering
As compared to fresh river water, sea water contains oxygen

10% more
10% less
20% more
20% less

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Waste Water Engineering
The recommended detention period for grit chambers is

1 minute
2 minutes
3 minutes
5 minutes

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