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Waste Water Engineering

Waste Water Engineering
Setting out the alignments of sewers may start from

Tail end
City
Out-fall
Any point

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

Circular
Rectangular
Parabolic
New egged

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Waste Water Engineering
The sewage treatment units in which anaerobic decomposition of organic matter is used, are called

Sludge sedimentation tanks
None of these
Imhoff tanks
Trickling filters

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Waste Water Engineering
The pH value of sewage is determined with the help of

None of these
Potentiometer
Turbid meter
Imhoff Cone

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

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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

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

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