Wastewater Story-Waste Water Treatment Plant (CBSE Class-7 Science): Questions 1 - 7 of 7

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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 » 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: 4

» 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

Question number: 5

» Wastewater Story » Waste Water Treatment Plant » Water Clarifier

MCQ▾

Question

Primary water clarifier is:

Choices

Choice (4) Response

a.

Sedimentation tanks

b.

Bar Screen

c.

Grit chambers

d.

All of the above

Question number: 6

» Wastewater Story » Waste Water Treatment Plant » Aerator Tank

MCQ▾

Question

Pumping of air in clarified water is called as the:

Choices

Choice (4) Response

a.

Biogas

b.

Aeration

c.

Aerobic bacteria

d.

Question does not provide sufficient data or is vague

Question number: 7

» Wastewater Story » Waste Water Treatment Plant » Sludge

MCQ▾

Question

Organic matter settled down at the base of sedimentation tank is called as:

Choices

Choice (4) Response

a.

Slush

b.

Contaminant

c.

Sludge

d.

Both a. and c. are correct

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