Wastewater Disposal Test – 2

1. The pollution zones in the river are divided into how many types?

2. In which pollution zone of the river, water retains its original dissolved oxygen concentration?

3. In which pollution zone of the river, growth of algae reappear?

4. In which pollution zone of the river, the concentration of D.O reduced to 40%?

5. Which is the third zone of pollution in the river?

6. In which pollution zone of the river, the dissolved oxygen reduced to 0?

7. The fishes were present in the river, but algaes were not able to survive. What is the zone of pollution of the river?