This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Wastewater Story > Class 7 Science Chapter 13 Wastewater Story – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 13 Wastewater Story Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Period 2005-2015 is being celebrated as the international decade for action on A) (a) water for life. B) (b) education for all. C) C) global war. D) D) terrorism. Show Answer Correct Answer: A) (a) water for life. 2. ..... are used to remove large objects like rags, sticks, cans, plastic packets, napkins, etc. A) Bar Screens. B) Scraper. C) Bacteria. D) None of these. Show Answer Correct Answer: A) Bar Screens. 3. Which is the first process of Wastewater Treatment Plant(WWTP)? A) Bar screen. B) Grit and sand removal tank. C) Water clarifier. D) Aerator. Show Answer Correct Answer: A) Bar screen. 4. Air is pumped into the clarified water for the growth of aerobic bacteria A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 5. The impurities present in sewage may consist of A) Organic substances. B) Inorganic substances. C) Nutrients. D) All of the above. Show Answer Correct Answer: D) All of the above. 6. Examples of nutrients A) Fruit and vegetable waste. B) Nitrates, Phosphates, metals. C) Protozones. D) Phosphorus and Nitrogen. Show Answer Correct Answer: D) Phosphorus and Nitrogen. 7. Is being celebrated as the international decade for action on A) Water for life. B) Education for all. C) Global War. D) Terrorism. Show Answer Correct Answer: A) Water for life. 8. Which process during waste water treatment helps in eliminating germs? A) Aeration. B) Sedimentation. C) Chlorination. D) None of the above. Show Answer Correct Answer: A) Aeration. 9. Where is the sludge and solids separated from the liquid? A) Clarifyers. B) Sewage treatment plant. C) Bio reactor. D) Inlet works. Show Answer Correct Answer: A) Clarifyers. 10. Pick from the Following one chemical which is used to disinfect water A) Chlorine. B) Coal. C) Silica. D) None of these. Show Answer Correct Answer: A) Chlorine. 11. The period of International Decade for action on 'Water for Life' is A) 2000-2010. B) 2005-2015. C) 2010-2020. D) 2003-2013. Show Answer Correct Answer: B) 2005-2015. 12. True Or FalseWastewater cannot be reused. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. Adopting good ..... practices should be our way of life A) Nome of these. B) Eating. C) Sanitation. D) Reading. Show Answer Correct Answer: C) Sanitation. 14. Choose the correct statements about ozone:(a) Its essential for breathing in living organisms.(b) It is used to disinfect water.(c) It absorbs ultraviolet rays.(d) Its proportion in air is about 3%. A) (a), (b) and (c). B) (b) and (c). C) (a) and (d). D) All four. Show Answer Correct Answer: B) (b) and (c). 15. Which one of the following is a step in wastewater treatment? A) Aeration. B) Filteration. C) Chlorination. D) All of These. Show Answer Correct Answer: D) All of These. 16. Which diseases caused by pollutants and disease-causing microorganisms in water is called? A) Diarrhoea. B) Waterborne. C) Dysentery. D) Typhoid. Show Answer Correct Answer: B) Waterborne. 17. The short form 'wastewater treatment plant' is A) Wp. B) PTWW. C) Wwwp. D) WWTP. Show Answer Correct Answer: D) WWTP. 18. What do u mean by WWTP? A) Wastewater Treatment Plant. B) Wasting Water Together. C) Wasted Water Treating Plant. D) None of the above. Show Answer Correct Answer: A) Wastewater Treatment Plant. 19. In the year of 2016, ..... mission was initiated by the government. A) If water is there, there is future. B) Swatch Bharat. C) Save daughter, teach daughter. D) Water for Life. Show Answer Correct Answer: B) Swatch Bharat. 20. Full form of WWTP is A) World wide transport program. B) Wastewater Treatment Plant. C) World Workers Talent Program. D) None of these. Show Answer Correct Answer: B) Wastewater Treatment Plant. 21. A plant which can absorb waste water rapidly and release pure water vapor to the atmosphere. A) Eucalyptus. B) Sunflower. C) Rose. D) Lily. Show Answer Correct Answer: A) Eucalyptus. 22. Which plant is suggested for purification of sewage pond water? A) Waste water plant. B) Eucalyptus plant. C) Urena plant. D) None of these. Show Answer Correct Answer: B) Eucalyptus plant. 23. Human excreta and urea are removed by A) Sludge. B) Bar screen. C) Sea beds. D) None of the above. Show Answer Correct Answer: A) Sludge. 24. NETWORK OF BIG AND SMALL PIPES IS CALLED A) SEWAGE. B) SLUDGE. C) SEWERS. D) WASTER WATER TREATMENT. Show Answer Correct Answer: C) SEWERS. 25. What is the purpose of using ultraviolet light on the water? A) To remove chlorine. B) To kill viruses. C) To bleach it out. D) To "sterilize" any bacteria. Show Answer Correct Answer: D) To "sterilize" any bacteria. 26. What is the effect of excessive organic compounds in water? A) Increase the level of dissolved oxygen (DO). B) Maintain the population of aquatic life. C) Not a cause to health hazard. D) Damage the ecosystem. Show Answer Correct Answer: D) Damage the ecosystem. 27. Select those which are organic substances present in waste water. A) Pesticides. B) Herbicides. C) Fruit and vegetable waste. D) All of the above. Show Answer Correct Answer: D) All of the above. 28. Which one of the following is a quality of wastewater? A) Foul smell. B) Bad taste. C) Dirty Look. D) All of these. Show Answer Correct Answer: D) All of these. 29. Assertion A:Soft toys, used tea leaves, paints and oils should not be thrown in the drain.Reason R:These waste choke the drain and do not allow free flow of oxygen thus hampering the degradation process. A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: A) Both A and R are true and R is the correct explanation of A. 30. We can disinfect water with chemicals like ..... and ..... A) Chlorine and ozone. B) Chlorine and iodine. C) Iodine and ozone. D) None of these. Show Answer Correct Answer: A) Chlorine and ozone. 31. Sewage is mainly a A) Liquid waste. B) Solid waste. C) Gaseous waste. D) Mixture of solid and gas. Show Answer Correct Answer: A) Liquid waste. 32. Human feces can be used to produce biogas fuel. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 33. Which plant have vegetative propagation of aerial stem? A) Bryophyllum. B) Bougainvillea. C) Chrysanthemum. D) Dahlia. Show Answer Correct Answer: C) Chrysanthemum. 34. Which type of pollination is self-pollination is? A) Inter-plant. B) Intraplant. C) Ovule. D) Mocropyle. Show Answer Correct Answer: B) Intraplant. 35. Which of the following is waste water? A) Water flowing in a river. B) Water coming out of a laundry. C) Water trickling from a damaged tap. D) Water coming out of a shower. Show Answer Correct Answer: B) Water coming out of a laundry. 36. ..... ARE USED TO CLEAN WATER A) CHLORINE. B) OZONE. C) BIOGAS. D) BOTH 1 AND 3. E) BOTH 1 AND 2. Show Answer Correct Answer: E) BOTH 1 AND 2. 37. An open-drain system is a breeding place for which of the following. A) Flies. B) Mosquitoes. C) Organisms which cause diseases. D) All of these. Show Answer Correct Answer: D) All of these. 38. Which of the following chemical is used to disinfect water A) Silica. B) Coal. C) Chlorine. D) Washing Soda. Show Answer Correct Answer: C) Chlorine. 39. Large objects and garbage in the wastewater are removed by passing them through the ..... A) Aeration tank. B) Bar screens. C) Grid removal tank. D) Digester. Show Answer Correct Answer: B) Bar screens. 40. The skimmer removes oil and grease A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 41. Examples of inorganic impurities A) Nitrates, Phosphates, metals. B) Phosphorus and Nitrogen. C) Protozones. D) Vibrio cholera. Show Answer Correct Answer: A) Nitrates, Phosphates, metals. 42. The ..... produced is used as a source of energy. A) Biogas. B) Carbondioxide. C) All the above. D) None of the above. Show Answer Correct Answer: A) Biogas. 43. Tuberculosis is a water-borne disease? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 44. Government started ..... in 2016 A) Grocery store. B) Yoga class. C) Swachch Bharat Mission. D) Hospital. Show Answer Correct Answer: C) Swachch Bharat Mission. 45. True or FalsePoor sanitation and contaminated drinking water is the cause of a large number of diseases. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 46. TO IMPROVE SANITATION, LOW COST ..... DISPOSAL SYSTEMS ARE BEING ENCOURAGED. A) ONSITE SEWAGE. B) BIOGAS. C) SEWERS. D) None of the above. Show Answer Correct Answer: A) ONSITE SEWAGE. 47. The swatch bharat abhiyan was started in A) 2014. B) 2016. C) 2015. D) 2017. Show Answer Correct Answer: B) 2016. 48. Why should we plant eucalyptus trees near the sewage? A) Eucalyptus trees should be planted along with sewage pondsbecause these trees absorb all surplus wastewaterquickly. B) Eucalyptus trees should be planted along with sewage pondsbecause they give fresh oxygen so it can purify the water. C) Eucalyptus trees should be planted along with sewage pondsbecause these trees purify the dust in water. D) None of the above. Show Answer Correct Answer: A) Eucalyptus trees should be planted along with sewage pondsbecause these trees absorb all surplus wastewaterquickly. 49. In sewerage, manholes are located at every: A) 20-25 m. B) 100-110 m. C) 90-100 m. D) 50-60 m. Show Answer Correct Answer: D) 50-60 m. 50. Onsite sewage disposal systems A) Septic tanks. B) Vermicomposting toilets. C) Chemical toilets. D) All the above. Show Answer Correct Answer: D) All the above. 51. Cooking oil and fats should not be thrown down the drain because they can harden and block the pipes. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 52. What is Waste Water Story? A) Water that has been used for various human activities and has became dirty. B) Water that has been used for various human activities and has not became dirty. C) Used water should not be wasted we must clean it up. D) None of the above. Show Answer Correct Answer: A) Water that has been used for various human activities and has became dirty. 53. Water formed at the end of aeration process A) Clarified water. B) Distilled water. C) Treated water. D) Wastewater. Show Answer Correct Answer: C) Treated water. 54. ON SITE DISPOSAL SYSTEMS EXAMPLE ARE A) SEPTIC TANKS. B) CHEMICAL TOILETS. C) COMPOSING PITS. D) ALL OF THESE. Show Answer Correct Answer: D) ALL OF THESE. 55. The main sewer pipelines are called ..... A) Sewage. B) Organic Matter. C) Decomposition. D) All of the above. Show Answer Correct Answer: A) Sewage. 56. Which of the following is used in vermi processing toilets? A) Cockroaches. B) Earthworms. C) Both A and B. D) None of these. Show Answer Correct Answer: B) Earthworms. 57. In vermi-processing toilet the human excreta is treated by A) Tapeworm. B) Roundworm. C) Earthworm. D) Redworm. Show Answer Correct Answer: C) Earthworm. 58. WWTP stands for: A) Waste Water Tremendous Plant. B) Waste Water Therapy Plant. C) Waste Water Travel Plant. D) Waste Water Treatment Plant. Show Answer Correct Answer: D) Waste Water Treatment Plant. 59. Anaerobic bacteria are added in the digester tank to decompose the organic matter to produce A) Biogas. B) Foul smell. C) Sludge. D) Sewage. Show Answer Correct Answer: A) Biogas. 60. Which of the following is not a source of wastewater? A) Industries. B) Sewers. C) Hospitals. D) Home. Show Answer Correct Answer: B) Sewers. Next →Related QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 13 Wastewater Story Quiz 2Class 7 Science Chapter 13 Wastewater Story Quiz 3 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books