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Waste Water Engineering

Waste Water Engineering
The ratio of minimum hourly flow to the average flow of sewage is

43894
43832
43834
43833

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Waste Water Engineering
The most widely used pump for lifting sewage is

Pneumatic ejector
Reciprocating pump
Centrifugal pump
Air pressure pump

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Waste Water Engineering
In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is

Q/(B × L)
Q/L
Q/(B × D)
Q/(L × D)

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Waste Water Engineering
In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is

2.25
2.55
2.5
2.65

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Waste Water Engineering
In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time?

100 mm dia
All of these
225 mm dia
150 mm dia

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Waste Water Engineering
The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is

120 cm
150 cm
110 cm
100 cm

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