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Waste Water Engineering

Waste Water Engineering
The design period in years for pumping plants, is

5 to 10
2 to 3
1
3 to 5

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Waste Water Engineering
Imhoff cone is used to measure

Total in organic solids
Total organic solids
Settleable solids
Total solids

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Waste Water Engineering
For detecting the nitrates in sewage, the colour may be developed by adding

Potassium permanganate
Sulphuric acid and napthamine
None of these
Phenol-di -sulphuric acid and potassium hydroxide

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Waste Water Engineering
The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is

0.20 cumec
0.10 cumec
0.15 cumec
0.12 cumec

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Waste Water Engineering
The sewer which collects the discharge from a collecting system and delivers it to a treatment plant, is known

Sewer outfall
Lateral sewer
House sewer
Branch sewer

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Waste Water Engineering
The non-clog pump which permits solid matter to pass out with the liquid sewage, is

None of these
Centrifugal pump
Pneumatic ejector
Reciprocating pump

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