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.
Class 7 Science Chapter 18 MCQ With Answers
Science Class 7 Chapter 18 MCQs On Wastewater Story
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
We hope the given NCERT MCQ Questions for Class 7 Science Chapter 18 Wastewater Story with Answers Pdf free download will help you. If you have any queries regarding Wastewater Story CBSE Class 7 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.
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