CBSE Class 7 Science Wastewater Story Quiz 1

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

A Foul smell B Bad taste C Dirty look D All of these

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

A water for life B education for all C global war D terrorism

3. In sewerage manholes are located at every

A 20-25 m B 50-60 m C 90-100 m D 100-110 m

4. Which one of the following is a step in wastewater treatment?

A Aeration B Filtration C Chlorination D All of these

5. Sludge in separate tanks is decomposed to get biogas by

A yeasts B aerobic bacteria C anaerobic bacteria D none of these

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

A Earthworm B Cockroach C Both of these D None of these

7. Sewage is mainly a

A liquid waste B Solid waste C gaseous waste D Mixture of solid and gas

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

A Biogas B Sludge C Both Biogas and sludge D Aerator

9. Open drain system is a breeding place for which of the following:

A Files B Mosquitoes C Organisms which cause diseases D All of these

10. Which of the following is not a source of waste water?

A Sewers B Homes C Industries D Hospitals