Check the below Online Education NCERT MCQ Questions for Class 7 Science Chapter 18 Wastewater Story with Answers Pdf free download. MCQ Questions for Class 7 Science with Answers were prepared based on the latest exam pattern. We have Provided Wastewater Story Class 7 Science MCQs Questions with Answers to help students understand the concept very well. https://ncertmcq.com/mcq-questions-for-class-7-science-with-answers/
You can refer to NCERT Solutions for Class 7 Science Chapter 18 Wastewater Story to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Online Education for Wastewater Story Class 7 MCQs Questions with Answers
Choose the correct answer:
Wastewater Story Class 7 MCQ Chapter 18 Question 1.
Which one of the following is a quality of wastewater?
(a) Foul smell
(b) Bad taste
(c) Dirty look
(d) All of these
Answer
Answer: (d) All of these
Class 7 Science Chapter 18 MCQ Question 2.
Period 2005-2015 is being celebrated as the international decade for action on
(a) water for life
(b) education for all
(c) global war
(d) terrorism
Answer
Answer: (a) water for life
Waste Water Story Class 7 MCQ Chapter 18 Question 3.
In sewerage manholes are located at every
(a) 20-25 m
(b) 50-60 m
(c) 90-100 m
(d) 100-110 m
Answer
Answer: (b) 50-60 m
Class 7 Science Ch 18 MCQ Question 4.
Which one of the following is a step in wastewater treatment?
(a) Aeration
(b) Filtration
(c) Chlorination
(d) All of these
Answer
Answer: (d) All of these
Ncert Class 7 Science Chapter 18 MCQ Question 5.
Sludge in separate tanks is decomposed to get biogas by
(a) yeasts
(b) aerobic bacteria
(c) anaerobic bacteria
(d) none of these
Answer
Answer: (c) anaerobic bacteria
MCQ On Wastewater Story Class 7 Chapter 18 Question 6.
Which one of the following is used in vermi-processing toilet?
(a) Earthworm
(b) Cockroach
(c) Both of these
(d) None of these
Answer
Answer: (a) Earthworm
Waste Water Management Class 7 MCQ Chapter 18 Question 7.
Sewage is mainly a
(a) liquid waste
(b) Solid waste
(c) gaseous waste
(d) Mixture of solid and gas
Answer
Answer: (a) liquid waste
MCQ On Waste Water Story Class 7 Chapter 18 Question 8.
Which of the following is/are products of wastewater treatment?
(a) Biogas
(b) Sludge
(c) Both Biogas and sludge
(d) Aerator
Answer
Answer: (c) Both Biogas and sludge
MCQ Questions For Class 7 Science Chapter 18 Question 9.
Open drain system is a breeding place for which of the following:
(a) Files
(b) Mosquitoes
(c) Organisms which cause diseases
(d) All of these
Answer
Answer: (d) All of these
MCQ Questions For Class 7 Science With Answers Chapter 18 Question 10.
Which of the following is not a source of waste water?
(a) Sewers
(b) Homes
(c) Industries
(d) Hospitals
Answer
Answer: (a) Sewers
Match the following:
| Column A | Column B |
| (i) Sewerage | (a) Decompose sludge |
| (ii) Bar screens | (b) Used in vermi-processing toilet |
| (iii) Anaerobic bacteria | (c) Remove large objects from wastewater |
| (iv) Cooking oil and fats | (d) Disinfect water |
| (v) Earthworm | (e) Block the pipes |
| (vi) Chlorine and ozone | (f) Transport system that carries sewage |
Answer
Answer:
| Column A | Column B |
| (i) Sewerage | (f) Transport system that carries sewage |
| (ii) Bar screens | (c) Remove large objects from wastewater |
| (iii) Anaerobic bacteria | (a) Decompose sludge |
| (iv) Cooking oil and fats | (e) Block the pipes |
| (v) Earthworm | (b) Used in vermi-processing toilet |
| (vi) Chlorine and ozone | (d) Disinfect water |
Fill in the blanks:
1. ………………… is generated in homes, industries, agricultural field and in other human activities. This is called …………………
Answer
Answer: Wastewater, sewage
2. Sewage is a liquid waste which causes ………………… and ………………… pollution.
Answer
Answer: water, soil
3. Wastewater is treated in ………………… treatment plant.
Answer
Answer: wastewater/sewage
4. Byproducts of wastewater treatment are ………………… and …………………
Answer
Answer: sludge, biogas
5. Open drain system is a breeding place for flies, mosquitoes and organisms which cause …………………
Answer
Answer: diseases
6. Dried sludge is used as …………………
Answer
Answer: manures
Choose the true and false statements from the following:
1. Wastewater cannot be reused.
Answer
Answer: False
2. Treatment plants reduce pollutants in wastewater to a level where nature can take care of it.
Answer
Answer: True
3. Poor sanitation and contaminated drinking water is the cause of a large number of diseases.
Answer
Answer: True
4. We should not defecate in open because untreated human excreta is a health hazard.
Answer
Answer: True
5. Chemicals like chlorine and ozone are used to disinfect water.
Answer
Answer: True
6. Cooking oil and fats should not be thrown down the drain because they can harden and block the pipes.
Answer
Answer: True
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