When sewage is fresh
When diluting water has high dissolved oxygen content
When diluting water is used for water supply near the point of sewage disposed
When the diluting water is having flow currents
Answer is Right!
Answer is Wrong!
The correct answer is: C. When diluting water is used for water supply near the point of sewage disposed.
Dilution is a method of sewage disposal that involves diluting the sewage with clean water. This method is not preferred when the diluting water is used for water supply near the point of sewage disposed because it can contaminate the water supply.
The other options are not correct because:
- Option A is not correct because fresh sewage is more likely to contain harmful bacteria than sewage that has been treated.
- Option B is not correct because high dissolved oxygen content in the diluting water can help to kill harmful bacteria in the sewage.
- Option D is not correct because flow currents can help to disperse the sewage and reduce the risk of contamination.