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Wastewater Story Mock Tests

12 questions available

Wastewater Story Mock Test 1

Questions: 12

नमूना प्रश्न

Class 7 Science
What is the process of treating wastewater before releasing it into rivers called?
A Irrigation
B Wastewater treatment
C Desalination
D Condensation
Class 7 Science
Sludge is:
A Treated wastewater
B Solid waste matter separated from wastewater during treatment
C Clean drinking water
D A type of fertilizer
Class 7 Science
Clean (treated) water from a wastewater treatment plant is best used for:
A Irrigating crops and gardening
B Drinking without further treatment
C Bathing
D Washing clothes
Class 7 Science
Which of the following is a cause of water pollution?
A Passing sewage through the treatment process
B Throwing dead animals into a river
C Planting trees near rivers
D Using rainwater for irrigation
Class 7 Science
Sludge is:
A Inorganic waste from factories
B Semi-solid material removed during wastewater treatment
C Clean drinking water
D Chemical fertilisers
Class 7 Science
Which of the following causes cholera through contaminated water?
A Clean water
B Untreated sewage in drinking water
C Oxygen-rich water
D Rainwater
Class 7 Science
In a wastewater treatment plant, the first step after screening is:
A Settling in a large tank where solids settle as sludge
B Adding chlorine
C Drying the sludge
D Releasing clean water
Class 7 Science
Which of the following causes diseases like cholera and diarrhoea through contaminated water?
A Clean air
B Wastewater contamination
C Oxygen
D Nitrogen

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