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

We have completed the NCERT/CBSE chapter-wise Multiple Choice Questions for Class 7 Science book Chapter 18 Wastewater Story with Answers by expert subject teacher for latest syllabus and examination. You can Prepare effectively for the exam taking the help of the Class 7 Science Objective Questions PDF free of cost from here. Students can take a free test of the Multiple Choice Questions of Wastewater Story. Each Questions has four options followed by the right answer. Download the Science Quiz Questions with Answers for Class 7 free Pdf and prepare to exam and help students understand the concept very well.

MCQ Questions for Class 7 Science with Answers

Q1. Excreta from the toilet seats flow through covered drains into a chemicals:

(i) chemicals
(ii) biogas plant
(iii) vermi-processing toilets
(iv) none of these

(ii) biogas plant

Q2. Which one is not a of household garbage

(i) Vegetable peels
(ii) Dal packets
(iii) Crockery pieces
(iv) Cow dung

(iv) Cow dung

Q3. Which one of the following is a step in wastewater treatment?

(i) Aeration
(ii) Filtration
(iii) Chlorination
(iv) All of these

(iv) All of these

Q4. Liquid waste consisting of suspended impurities is called

(i) Contaminant
(ii) Sewage
(iii) Aeration
(iv) Chlorination

(ii) Sewage

Q5. The period of International Decade for action on ‘Water for Life’ is

(i) 2000-2010
(ii) 2005-2015
(iii) 2010-2020
(iv) 2003-2013

(ii) 2005-2015

Q6. What decomposes the sludge:

(i) aerobic bacteria
(ii) anaerobic bacteria
(iii) both (i) and (ii)
(iv) none of these

(ii) anaerobic bacteria

Q7. Sanitation in the cities is the function of

(i) Municipal corporation
(ii) Non-government organisation
(iii) Individual person
(iv) Societies of locality

(i) Municipal corporation

Q8. Which one of the following is used in vermi-processing toilet?

(i) Earthworm
(ii) Cockroach
(iii) Both of these
(iv) None of these

(i) Earthwor

Q9. Cooking oil and fats should not be thrown down the drain because

(i) They flow through the drain freely
(ii) It allows the particles to get filtered
(iii) They harden and block the pipe
(iv) They break the pipe

(iii) They harden and block the pipe

Q10. Which of the following is a part of inorganic impurities of the sewage?

(i) Pesticides
(ii) Urea
(iii) Phosphates
(iv) Vegetable waste

(iii) Phosphates

Q11. By which we can prevent drains at our houses from getting choked:

(i) cooking oil and fats should not be thrown down the drain
(ii) used tea leaves thrown down the drain
(iii) motor oil thrown down the drain
(iv) none of these

(i) cooking oil and fats should not be thrown down the drain

Q12. Jaundice affects which organ?

(i) Lung
(ii) Liver
(iii) Heart
(iv) Kidney

(ii) Liver

Q13. Sewage is mainly a

(i) liquid waste
(ii) Solid waste
(iii) gaseous waste
(iv) Mixture of solid and gas

(i) liquid waste

Q14. Water borne disease is

(i) Diabetes
(ii) Cancer
(iii) Appendicitis
(iv) Cholera

(i) Diabetes

Q15. Suspended impurities contained by sewage are called

(i) contaminants
(ii) sludge
(iii) grey water
(iv) none of these

(i) contaminants

Q16. We use water at home to wash clothes and utensils, bathe and flush toilets, it becomes dirty water is called:

(i) drainage
(ii) sewage
(iii) wastewater
(iv) none of these

(iii) wastewater

Q17. The sludge waste originates from

(i) kitchen
(ii) toilets
(iii) industrial organizations
(iv) commercial organizations

(i) kitchen

Q18. Open drain system is a breeding place for which of the following:

(i) Files
(ii) Mosquitoes
(iii) Organisms which cause diseases
(iv) All of these

(iv) All of these

Q19. The technique of watering plants by making use of narrow tubings which deliver water directly at the base of the base of the plant is

(i) Lawn sprinkling
(ii) Tube wells
(iii) River-lift irrigation
(iv) Drip irrigation

(iv) Drip irrigation

Q20. Solid waste extracted during sewage treatment is known as

(i) sewage
(ii) sludge
(iii) biogas
(iv) contaminants

(ii) sludge

Q21. Which of these statements are correct about Ozone:

(i) it is essential for breathing of living organism
(ii) it is used to disinfect water
(iii) it absorbs ultra voilet rays
(iv) its proportion in air is about 3%

(ii) it is used to disinfect water & (iii) it absorbs ultra voilet rays

Q22. This is not the cause of water pollution:

(i) floods
(ii) rains
(iii) open defection
(iv) chemicals

(ii) rains

Q23. Period 2005-2015 is being celebrated as the international decade for action on

(i) water for life
(ii) education for all
(iii) global war
(iv) terrorism

(i) water for life

Q24. Name the scraper that removes solids like forced from the wastewater.

(i) Skimmer
(ii) Sludge
(iii) Tank
(iv) All of these

(ii) Sludge

Q25. Sewage is a:

(i) liquid waste
(ii) solid waste
(iii) gaseous waste
(iv) none of these

(i) liquid waste

Q26. The network of drainage pipe to carry waste water is called

(i) Sewer system
(ii) Water supply system
(iii) Drainage
(iv) Waste water supply

(i) Sewer system

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