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Waste Water Engineering

Waste Water Engineering
Water content of sewage is about

0.9
0.999
0.95
0.99

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

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

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Waste Water Engineering
The maximum diameter of sewers adopted in the designs is

2.0 m
1.0 m
4.0 m
3.0 m

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Waste Water Engineering
The spacing of bars for perforations in coarse screens used for the treatment of sewage, is

40 mm
50 mm
30 mm
20 mm

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Waste Water Engineering
Self-cleansing velocity is

Velocity of water in a pressure filter
Velocity of water at flushing
Velocity at dry weather flow
Velocity at which no accumulation remains in the drains

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Waste Water Engineering
Imhoff cone is used to determine

Suspended solids
Dissolved solids
Settleable solids
None of these

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