MEDIUM
7th CBSE
IMPORTANT
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Primary treatment of waste water is a mechanical process.

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Important Questions on Waste Water Management Plants

MEDIUM
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 18 - Waste Water Management Plants>Let's revise>Objective questions
Scum is removed with a skimmer.
MEDIUM
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 18 - Waste Water Management Plants>Let's revise>Objective questions
Septic tank is an example of on-site sewage disposal system.
MEDIUM
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 18 - Waste Water Management Plants>Let's revise>Objective questions
Aeration of clarified water kills disease-causing microbes.
EASY
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 18 - Waste Water Management Plants>Let's revise>Objective questions
Sewer pipes are made up of cast iron.
MEDIUM
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 18 - Waste Water Management Plants>Let's revise>Objective questions

Solve the following crossword puzzle:

Question Image
Across
2. Impurities present in wastewater
3. Wastewater
4. The leakage of petroleum oil into the sea.
Down
1. This fuel is produced by anaerobic fermentation of sludge
2. It is a waterborne disease

EASY
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 18 - Waste Water Management Plants>Let's revise>Subjective questions
How will you define waste?
MEDIUM
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 18 - Waste Water Management Plants>Let's revise>Subjective questions
Why are bacteria used in sewage treatment plants?
MEDIUM
7th CBSE
IMPORTANT
Frank Everyday Science>Chapter 18 - Waste Water Management Plants>Let's revise>Subjective questions
What is the function of screens in a water treatment plant?