MCQ Questions | Class 7 Science Chapter 18 | Wastewater Story with Answers

MCQ | Wastewater Story Class 7

Check the below 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.

Objective Question | NCERT Science Class 7

NCERT Solutions Class 7 Science
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	7th
Subject:	Science
Chapter:	18
Chapters Name:	Wastewater Story
Medium:	English

Ncert Solutions for Class 7 Science | Objective Type Questions

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.

Wastewater Story | Class 7 Science | NCERT Solutions

Q1.	cbse class 7 science notes pdf Wastewater released by homes, factories, industries and other users is known as
	A. polluted water
	B. sewage
	C. both (1) and (2)
	D. none of these

Ans: sewage

Q2.	cbse science class 7 book Suspended impurities contained by sewage are called
	A. contaminants
	B. sludge
	C. grey water
	D. none of these

Ans: contaminants

Q3.	cbse science class 7 book pdf A network of big and small pipes under the ground for wastewater management is known as
	A. sewage
	B. sewerage
	C. manhole
	D. channel

Ans: sewerage

Q4.	cbse science class 7 chapter 18 Solid waste extracted during sewage treatment is known as
	A. sewage
	B. sludge
	C. biogas
	D. contaminants

Ans: sludge

Q5.	cbse science class 7 mcq Which one is not a of household garbage
	A. Vegetable peels
	B. Dal packets
	C. Crockery pieces
	D. Cow dung

Ans: Cow dung

Q6.	cbse science class 7 question paper Which of the following is not a source of wastewater?
	A. Sewers
	B. Homes
	C. Industries
	D. Hospitals

Ans: Sewers

Q7.	cbse science class 7 solutions 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

Ans: water for life

Q8.	cbse science class 7 syllabus Which process removes the solids like foeces and other substances from the waste water:
	A. chlorination
	B. decomposition
	C. evaporation
	D. sand and grit removal

Ans: sand and grit removal

Q9.	class 7 mcq The process of waste treatment is called
	A. Water treatment
	B. Pollutant separation
	C. Sewage treatment
	D. Chlorination

Ans: Sewage treatment

Q10.	class 7 science book The period of International Decade for action on ‘Water for Life’ is
	A. 2000 – 2010
	B. 2005 – 2015
	C. 2010 – 2020
	D. 2003 – 2013

Ans: 2005 – 2015

Q11.	class 7 science book pdf In sewerage manholes are located at every
	A. 20-25 m
	B. 50-60 m
	C. 90-100 m
	D. 100-110 m

Ans: 50-60 m

Q12.	class 7 science chapter 18 Excreta from the toilet seats flow through covered drains into a chemicals:
	A. chemicals
	B. biogas plant
	C. vermi-processing toilets
	D. none of these

Ans: biogas plant

Q13.	class 7 science mcq Sanitation in the cities is the function of
	A. Municipal corporation
	B. Non-government organisation
	C. Individual person
	D. Societies of locality

Ans: Municipal corporation

Q14.	class 7 science mcq online test The process of removing pollutants in water before it enter a water body is called
	A. cleaning of water
	B. refining
	C. filtering of water
	D. none of these

Ans: cleaning of water

Q15.	class 7 science notes Which one of the following is a step in wastewater treatment?
	A. Aeration
	B. Filtration
	C. Chlorination
	D. All of these

Ans: All of these

Q16.	mcq class 7 science chapter 18 The biogas product is used as a source of:
	A. rains
	B. oils
	C. energy
	D. all of these

Ans: energy

Q17.	mcq for class 7 science chapter 18 An example of source reduction of waste is
	A. Burning
	B. Making paper aero planes
	C. Throwing things that are old
	D. Backward composting

Ans: Backward composting

Q18.	mcq for class 7 with answers wastewater story Which of the following is a part of inorganic impurities of the sewage?
	A. Pesticides
	B. Urea
	C. Phosphates
	D. Vegetable waste

Ans: Phosphates

Q19.	mcq questions class 7 science Which portion of WWTP retains large objects like rags, sticks, etc.?
	A. Bar screen
	B. Sludge
	C. Sedimentation tank
	D. Sewerage

Ans: Bar screen

Q20.	mcq questions class 7 science chapter 18 Name the scraper that removes solids like forced from the wastewater.
	A. Skimmer
	B. Sludge
	C. Tank
	D. All of these