Wastewater Story (CBSE Class-7 Science): Questions 15 - 21 of 23

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Question number: 15

» Wastewater Story » Water, Our Lifeline » Clean Water

MCQ▾

Question

Scarcity of clean potable water is due to:

Choices

Choice (4) Response
a.

Industrial development

b.

Population growth

c.

Pollution

d. All a. , b. and c. are correct

Question number: 16

» Wastewater Story » Water, Our Lifeline » Impurities in Water

MCQ▾

Question

Different types of impurities present in water are:

Choices

Choice (4) Response
a.

Nutrients, Bacteria

b.

Inorganic impurities

c.

Organic impurities

d. All a. , b. and c. are correct

Question number: 17

» Wastewater Story » Sanitation and Disease » Alternative Arrangement for Sewage Disposal

MCQ▾

Question

Onsite arrangements for sewage disposal are:

Choices

Choice (4) Response
a.

Composting pits

b.

Chemical toilets

c.

Septic tanks

d. All a. , b. and c. are correct

Question number: 18

» Wastewater Story » Polluted Water » Cause of Water Pollution

MCQ▾

Question

Water is polluted from various sources such as from:

Choices

Choice (4) Response
a.

Farms

b.

Mining operations and construction work

c.

Houses, Industries

d. All a. , b. and c. are correct

Question number: 19

» Wastewater Story » Sewage » Sewers and Sewerages

MCQ▾

Question

Underground network of inter-connected pipes is called as:

Choices

Choice (4) Response
a.

Sewer

b.

Sewerage

c.

Sewage

d. None of the above

Question number: 20

» Wastewater Story » Better House Keeping Practices » Various Ways to Prevent Water Pollution

MCQ▾

Question

Wastes which choke the drain are:

Choices

Choice (4) Response
a.

Cotton, Sanitary Napkins

b.

Used tea leaves, solid food remains

c. Both a. and b. are correct
d. Question does not provide sufficient data or is vague

Question number: 21

» Wastewater Story » Polluted Water » Treatment of Polluted Water

MCQ▾

Question

Treatment of wastewater involves:

Choices

Choice (4) Response
a.

Chemical Processes

b.

Biological processes

c.

Physical processes

d. All a. , b. and c. are correct

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