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Waste Water Engineering

Waste Water Engineering
Disposal to sewage in large cities, is done in

Purification
Irrigation
Dilution
Oxidation

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Waste Water Engineering
The formula which accepts the value of rugosity coefficient n = 0.012 to be used in Manning’s formula, is given by

William-Hazen
Kutter
Crimp and Bruges
Bazin

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Waste Water Engineering
The ratio of maximum sewage flow to average sewage flow for trunk mains having diameters more than 1.25 m, is

4
2
1.5
3

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Waste Water Engineering
The algae dies out in the zone of

Degradation
Cleaner water
Recovery
Active decomposition

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Waste Water Engineering
If is the diameter of upper circular portion, the overall depth of a standard egg shaped section, is

1.75 D
1.25 D
1.15 D
1.5 D

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Waste Water Engineering
If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity is

1 in 100
1 in 120
1 in 60
None of these

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