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Waste Water Engineering

Waste Water Engineering
Discrete or granular particles change their

Weight
None of these
Size
Shape

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Waste Water Engineering
Flocculated particles do not change their

None of these
Shape
Size
Weight

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Waste Water Engineering
If q is the average sewage flow from a city of population P, the maximum sewage flow

Q = [(5 + )/((15 + )] q
Q = [(18 + P)/(4 + )] q
Q = [(18 + )/(4 + )] q
Q = [(4 + )/(18 + )] q

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Waste Water Engineering
Inter-distance between ventilation columns in a sewer line is kept

25 to 50 m
50 m to 100 m
100 m to 150 m
150 m to 300 m

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Waste Water Engineering
The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is

d (0.785d + 0.011H)/Q
d² (0.011d + 0.785H)/Q
d (0.022d + 0.085H)/Q
d (0.285d + 0.011H)/Q

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Waste Water Engineering
The most efficient cross section of sewers in a separate sewerage system is

Rectangular
Circular
Parabolic
New egged

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