Wastewater Story Mock Tests

12 questions available

Wastewater Story Mock Test 1

Questions: 12

Sample Questions

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

What is the treated water from a wastewater treatment plant mainly used for?

A Drinking

B Irrigation and industrial use

C Bathing

D Cooking

Class 7 Science

Which of the following diseases can be caused by drinking contaminated water?

A Cholera

B Asthma

C Malaria

D Diabetes

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

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

The main cause of wastewater pollution is:

A Rainwater

B Domestic, industrial, and agricultural waste

C Oxygen dissolved in water

D Fish in water

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

Which of the following causes cholera through contaminated water?

A Clean water

B Untreated sewage in drinking water

C Oxygen-rich water

D Rainwater

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