Civil Engineering :: Waste Water Engineering
- The temperature affects the
- The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is
- The sewage treatment in septic tanks is due to
- Which one of the following statements regarding septic tanks is wrong?
- If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of
- The asbestos cement sewers are
- If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is
- hydraulically equivalent, the relationship which holds good, is
- For design of sewers, percentage of sewage discharge is assumed
- Nitrogen cycle of sewage, is
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A.
Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen |
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B.
Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates |
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C.
Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia |
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D.
Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates |