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Waste Water Engineering

Waste Water Engineering
The width of a rectangular sewer is twice its depth while discharging 1.5 m/sec. The width of the sewer is

1.36 m
1.76 m
0.88 m
0.68 m

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Waste Water Engineering
15 cumecs, the depth d and width are related by For drains up to

d = 0.2 B
d = 0.5 B
B = 0.2 d
B = 0.5 d

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Waste Water Engineering
The presence of free ammonia in sewage, is detected by

Adding potassium permanganate
Phenol-di-sulphuric acid
Boiling
Adding sulphuric acid

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Waste Water Engineering
Kjeldahl nitrogen is a mixture of

All listed here
Nitrogen and organic nitrogen
Organic nitrogen and ammonia
Ammonia and nitrogen

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Waste Water Engineering
The gradient of sewers depends upon

Diameter of the sewer
Discharge
All listed here
Velocity of flow

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Waste Water Engineering
For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is

24 m
16 m
20 m
30 m

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