Chapter-18 ➤ Wastewater Story

1. Treatment plants reduce pollutants in wastewater to a level where nature can take care of it.

 
 

2. We should not defecate in open because untreated human excreta is a health hazard.

 
 

3. Period 2005-2015 is being celebrated as the international decade for action on

 
 
 
 

4. Sewage is mainly a

 
 
 
 

5. Which one of the following is used in vermi-processing toilet?

 
 
 
 

6. In sewerage manholes are located at every

 
 
 
 

7. Poor sanitation and contaminated drinking water is the cause of a large number of diseases.

 
 

8. Which of the following is/are products of wastewater treatment?

 
 
 
 

9. Which one of the following is a quality of wastewater?

 
 
 
 

10. Cooking oil and fats should not be thrown down the drain because they can harden and block the pipes.

 
 

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