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Waste Water Engineering

Waste Water Engineering
Discrete or granular particles change their

Size
Weight
Shape
None of these

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Waste Water Engineering
The rate of accumulation of sludge per person per year, is

25 litres
20 litres
15 litres
10 litres

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Waste Water Engineering
The sewer that unloads the sewage at the point of treatment is called

Branch sewer
House sewer
Main sewer
Outfall sewer

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Waste Water Engineering
The settling velocity of a spherical particle of diameter less than 0.1 mm as per Stock’s law, is

Vs = 218 (Gs – Gw)d² [(3T + 70)/100]
Vs = 418 (Gs – Gw)d² [(3T + 70)/100]
Vs = 418 (Gs – Gw) d [(3T + 70)/100]
Vs = 218 (Gs – Gw)d [(3T + 70)/100]

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

52.5 cm
None of these
82.5 cm
67.5 cm

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

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

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