V K Sally and S K Aggarwal Solutions for Chapter: Wastewater Management, Exercise 3: EXERCISES
V K Sally Science Solutions for Exercise - V K Sally and S K Aggarwal Solutions for Chapter: Wastewater Management, Exercise 3: EXERCISES
Attempt the practice questions on Chapter 18: Wastewater Management, Exercise 3: EXERCISES with hints and solutions to strengthen your understanding. Learning Elementary Science for Class 7 solutions are prepared by Experienced Embibe Experts.
Questions from V K Sally and S K Aggarwal Solutions for Chapter: Wastewater Management, Exercise 3: EXERCISES with Hints & Solutions
Raw sewage is a _____ hazard.
Chlorination is done during _____ treatment.
Dried _____ is used as manure.
Suspended matter present in sewage which settles in settling tank is called sludge.
Match the statements in Column A with those Column B.
| Column A | Column B |
| 1. Sewage | (a) Cause of diseases |
| 2. Contamination of drinking water with sewage | (b) Passing through screen |
| 3. First stage of sewage treatment | (c) Chlorination |
| 4. Last stage of sewage treatment | (d) Human excreta, soaps, other liquid wastes from kitchen and toilet |
The number of diseases like cholera and typhoid had increased in Shilpa's village during last one year. She found that at many places drinking water was contaminated with sewage. People were drinking the contaminated water. She suggested her friends that they should boil water before use. She also requested her parents to take the help of municipal office of the area.
Which preventive measures would you suggest to avoid contamination of drinking water with sewage?
The number of diseases like cholera and typhoid had increased in Shilpa's village during last one year. She found that at many places drinking water was contaminated with sewage. People were drinking the contaminated water. She suggested her friends that they should boil water before use. She also requested her parents to take the help of municipal office of the area.
Which values are displayed by Shilpa in taking the initiative?
The number of diseases like cholera and typhoid had increased in Shilpa's village during last one year. She found that at many places drinking water was contaminated with sewage. People were drinking the contaminated water. She suggested her friends that they should boil water before use. She also requested her parents to take the help of municipal office of the area.
Suggest one school activity to promote such values in school children.
