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Waste Water Engineering

Waste Water Engineering
The maximum diameter of sewers adopted in the designs is

4.0 m
1.0 m
3.0 m
2.0 m

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

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Waste Water Engineering
Dry water flow in a combined sewer, is

Storm water
Domestic sewage
Inclusive of domestic and industrial sewage but excludes storm water
Industrial sewage

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Waste Water Engineering
In olden days the type of section adopted in trunk and out fall sewers was

Horse shoe shaped
Parabolic shaped
Egg shaped
Circular shaped

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Waste Water Engineering
To maintain aerobic biological activity, the moisture content of the compost mass should be about

0.5
0.55
0.6
0.45

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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
100 cm
110 cm
150 cm

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