Wastewater Story (CBSE Class-7 Science): Questions 1 - 7 of 23

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Question number: 1

» Wastewater Story » Waste Water Treatment Plant » Water Clarifier

MCQ▾

Question

In secondary clarifier sludge is used as:

Choices

Choice (4) Response

a.

Manure

b.

Construction materials

c.

Fertilizers

d.

All a. , b. and c. are correct

Question number: 2

» Wastewater Story » Waste Water Treatment Plant » Sludge

MCQ▾

Question

Processes of sludge treatment are:

Choices

Choice (4) Response

a.

Solid Composting, Incinerating

b.

Incinerating, Dewatering, solid composting

c.

Dewatering, Solid composting

d.

All a. , b. and c. are correct

Question number: 3

» Wastewater Story » Sanitation and Disease » Sanitation at Public Places

MCQ▾

Question

The practice of open defecation leads to:

Choices

Choice (4) Response

a.

Contamination of sources of underground water like wells, tubewells

b.

Soil Contamination

c.

Contamination of water tables

d.

All a. , b. and c. are correct

Question number: 4

» Wastewater Story » Sewage » Sewers and Sewerages

MCQ▾

Question

The underground pipes, which carry away, dirty drainage water and waste matter from the house is called as:

Choices

Choice (4) Response

a.

Sewer

b.

Sewerage

c.

Gutter

d.

Both a. and c. are correct

Question number: 5

» Wastewater Story » Waste Water Treatment Plant » Bar Screen

MCQ▾

Question

Bar screen removes the:

Choices

Choice (4) Response

a.

Sludge

b.

Coarse and floating solids from the sewage

c.

Grit and sand removal

d.

None of the above

Question number: 6

» Wastewater Story » Water, Our Lifeline » Cleaning of Water

MCQ▾

Question

Cleaning water is the process of removing:

Choices

Choice (4) Response

a.

Suspended solids and gases from water

b.

Undesirable chemicals from water

c.

Biological contaminants from water

d.

All a. , b. and c. are correct

Question number: 7

» Wastewater Story » Waste Water Treatment Plant » Grit and Sand Removal Tank

MCQ▾

Question

In the wastewater treatment plant wastewater is passed after screening into the:

Choices

Choice (4) Response

a.

Grit and sand removal tank

b.

Aeration

c.

Sedimentation tank

d.

None of the above

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