{"id":764496,"date":"2025-05-12T11:36:57","date_gmt":"2025-05-12T06:06:57","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=764496"},"modified":"2025-05-12T11:41:47","modified_gmt":"2025-05-12T06:11:47","slug":"wastewater-story-class-7-mcq-with-answers","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/mcqs\/class-7-science-wastewater-story\/","title":{"rendered":"Wastewater Story Class 7 MCQ With Answers"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/mcqs\/class-7-science-wastewater-story\/#Wastewater_Story_Class_7_MCQ\" title=\"Wastewater Story Class 7 MCQ\">Wastewater Story Class 7 MCQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/mcqs\/class-7-science-wastewater-story\/#CBSE_Class_7_Science_Wastewater_Story_MCQ_With_Answers\" title=\"CBSE Class 7 Science Wastewater Story MCQ With Answers\">CBSE Class 7 Science Wastewater Story MCQ With Answers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/mcqs\/class-7-science-wastewater-story\/#Benefits_of_Practicing_Wastewater_Story_Class_7_MCQs_with_Answers\" title=\"Benefits of Practicing Wastewater Story Class 7 MCQs with Answers\">Benefits of Practicing Wastewater Story Class 7 MCQs with Answers<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"sm-table-layout__cell sm-table-layout__cell_align_left sm-table-layout__cell_fixed-cell_phrase\" role=\"cell\" data-testid=\"table-cell-keyword\">\n<div class=\"sm-cell-phrase\"><strong>Wastewater Story Class 7 MCQ\u200b\u200b:<\/strong> The chapter \u201cWastewater Story\u201d from the <strong><a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-syllabus\/class-7\/\">CBSE Class 7 syllabus<\/a><\/strong> teaches students about how dirty water or sewage is treated before it is released into the environment. It explains important concepts like sanitation, sewage treatment plants, and the importance of clean water for health and nature.<\/div>\n<div><\/div>\n<div class=\"sm-cell-phrase\">This chapter encourages students to think about hygiene, waste management, and how we can all help keep our surroundings clean. Practicing <strong><a href=\"https:\/\/infinitylearn.com\/surge\/mcqs\/class-7\/\">Class 7 MCQs<\/a><\/strong> from this chapter is a smart way to test understanding and boost exam readiness. These wastewater story class 7 mcq\u200b help students revise key topics quickly and in an engaging way. With regular practice, students can gain more confidence and score better in their exams.<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Wastewater_Story_Class_7_MCQ\"><\/span>Wastewater Story Class 7 MCQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div>The chapter \u201cWastewater Story\u201d from the<strong><a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-class-7-science-syllabus\/\"> CBSE Class 7 Science syllabus<\/a><\/strong> focuses on essential concepts related to sanitation, sewage systems, treatment of wastewater, and the importance of clean water for health and the environment. Key topics include sewage and its components, wastewater treatment processes, role of microorganisms, septic tanks, sludge and its uses, sanitation at public places, and eco-friendly practices like vermi-processing toilets.<\/div>\n<div><\/div>\n<div>This chapter carries approximately 4 to 6 marks in school exams and often includes multiple-choice questions (MCQs), short answer type questions, and diagram-based questions. Students may also be asked to explain how wastewater is treated or to describe how poor sanitation affects health. Practicing <strong><a href=\"https:\/\/infinitylearn.com\/surge\/mcqs\/class-7-science\/\">Class 7 Science MCQs<\/a> <\/strong>and using <strong><a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-7\/\">NCERT solutions for Class 7<\/a><\/strong> helps in preparing for these questions effectively, especially for competitive and school-level assessments. Understanding this chapter builds awareness about environmental cleanliness and responsible water usage.<\/div>\n<\/div>\n<div class=\"sm-table-layout__cell sm-table-layout__cell_align_left sm-table-layout__cell_fixed-cell_phrase\" role=\"cell\" data-testid=\"table-cell-keyword\">\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Class_7_Science_Wastewater_Story_MCQ_With_Answers\"><\/span>CBSE Class 7 Science Wastewater Story MCQ With Answers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Q1. Which component of wastewater is broken down by bacteria in a treatment plant?<\/strong><br \/>\nA. Oil<br \/>\nB. Soap<br \/>\nC. Organic waste<br \/>\nD. Sand<br \/>\nAnswer: C. Organic waste<\/p>\n<p><strong>Q2. What is the first step in the wastewater treatment process?<\/strong><br \/>\nA. Disinfection<br \/>\nB. Sludge removal<br \/>\nC. Screening<br \/>\nD. Aeration<br \/>\nAnswer: C. Screening<\/p>\n<p><strong>Q3. What is the term for solid waste that settles at the bottom of a treatment tank?<\/strong><br \/>\nA. Slime<br \/>\nB. Sludge<br \/>\nC. Sediment<br \/>\nD. Filtrate<br \/>\nAnswer: B. Sludge<\/p>\n<p><strong>Q4. Which gas is commonly produced during sludge digestion?<\/strong><br \/>\nA. Oxygen<br \/>\nB. Hydrogen<br \/>\nC. Biogas<br \/>\nD. Ammonia<br \/>\nAnswer: C. Biogas<\/p>\n<p style=\"text-align: center;\"><strong>Also Check:  <a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-7\/science\/chapter-18-waste-water-story\/\">NCERT Solutions for Class 7 Science Chapter 18<\/a><\/strong><\/p>\n<p><strong>Q5. What does sewage mainly consist of?<\/strong><br \/>\nA. Saltwater and chemicals<br \/>\nB. Wastewater and human excreta<br \/>\nC. Only chemicals<br \/>\nD. Only industrial waste<br \/>\nAnswer: B. Wastewater and human excreta<\/p>\n<p><strong>Q6. Why is aeration important in wastewater treatment?<\/strong><br \/>\nA. To add chlorine<br \/>\nB. To kill bacteria<br \/>\nC. To help bacteria break down waste<br \/>\nD. To remove color<br \/>\nAnswer: C. To help bacteria break down waste<\/p>\n<p><strong>Q7. What does a bar screen in a treatment plant do?<\/strong><br \/>\nA. Disinfect water<br \/>\nB. Kill germs<br \/>\nC. Filter out large objects<br \/>\nD. Mix water<br \/>\nAnswer: C. Filter out large objects<\/p>\n<p><strong>Q8. Which one of these is a natural method of water purification?<\/strong><br \/>\nA. Chlorination<br \/>\nB. Boiling<br \/>\nC. Filtration through sand and soil<br \/>\nD. Adding bleach<br \/>\nAnswer: C. Filtration through sand and soil<\/p>\n<p><strong>Q9. What is the full form of WWTP?<\/strong><br \/>\nA. Water Waste Treatment Process<br \/>\nB. Wastewater Treatment Plant<br \/>\nC. Water Washing and Treatment Plant<br \/>\nD. Water Waste Transfer Protocol<br \/>\nAnswer: B. Wastewater Treatment Plant<\/p>\n<p><strong>Q10. Which process involves adding air to wastewater?<\/strong><br \/>\nA. Disinfection<br \/>\nB. Sedimentation<br \/>\nC. Aeration<br \/>\nD. Screening<br \/>\nAnswer: C. Aeration<\/p>\n<p style=\"text-align: center;\"><strong>Also Check: <a href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse-notes\/class-7\/science\/waste-water-story-class-7-notes-science-chapter-18\/\">NCERT Class 7 Notes Science Chapter 18<\/a><\/strong><\/p>\n<p><strong>Q11. Pathogens in sewage are mainly:<\/strong><br \/>\nA. Stones<br \/>\nB. Harmful bacteria and viruses<br \/>\nC. Plastic items<br \/>\nD. Detergents<br \/>\nAnswer: B. Harmful bacteria and viruses<\/p>\n<p><strong>Q12. Which part of the sewage treatment involves removing oil and grease?<\/strong><br \/>\nA. Primary treatment<br \/>\nB. Secondary treatment<br \/>\nC. Screening<br \/>\nD. Skimming<br \/>\nAnswer: D. Skimming<\/p>\n<p><strong>Q13. What is the role of earthworms in natural wastewater treatment?<\/strong><br \/>\nA. They release chlorine<br \/>\nB. They absorb water<br \/>\nC. They help break down waste<br \/>\nD. They kill germs<br \/>\nAnswer: C. They help break down waste<\/p>\n<p><strong>Q14. Vermi-processing toilets use:<\/strong><br \/>\nA. Machines<br \/>\nB. Sand filters<br \/>\nC. Earthworms<br \/>\nD. Detergents<br \/>\nAnswer: C. Earthworms<\/p>\n<p><strong>Q15. Treated water from WWTP is:<\/strong><br \/>\nA. Ready for drinking<br \/>\nB. Released into rivers<br \/>\nC. Used for cooking<br \/>\nD. Stored underground<br \/>\nAnswer: B. Released into rivers<\/p>\n<p style=\"text-align: center;\"><strong>Also Check: <a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-exemplar-solutions\/class-7\/science\/chapter-18-wastewater-story\/\">NCERT Exemplar Solutions for Class 7 chapter 18<\/a><\/strong><\/p>\n<p><strong>Q16. One harmful effect of untreated sewage is:<\/strong><br \/>\nA. Increase in rainfall<br \/>\nB. Decrease in water temperature<br \/>\nC. Water pollution<br \/>\nD. Water purification<br \/>\nAnswer: C. Water pollution<\/p>\n<p><strong>Q17. Which one is not a source of wastewater?<\/strong><br \/>\nA. Toilets<br \/>\nB. Washing machines<br \/>\nC. Trees<br \/>\nD. Factories<br \/>\nAnswer: C. Trees<\/p>\n<p><strong>Q18. Which stage of sewage treatment uses microbes to decompose organic matter?<\/strong><br \/>\nA. Screening<br \/>\nB. Primary treatment<br \/>\nC. Secondary treatment<br \/>\nD. Disinfection<br \/>\nAnswer: C. Secondary treatment<\/p>\n<p><strong>Q19. Which system uses bacteria to clean water naturally?<\/strong><br \/>\nA. Chemical disinfection<br \/>\nB. Septic tanks<br \/>\nC. Water harvesting<br \/>\nD. Solar purification<br \/>\nAnswer: B. Septic tanks<\/p>\n<p><strong>Q20. Biogas is mainly composed of:<\/strong><br \/>\nA. Carbon dioxide<br \/>\nB. Oxygen<br \/>\nC. Methane<br \/>\nD. Hydrogen<br \/>\nAnswer: C. Methane<\/p>\n<p><strong>Q21. Which method removes suspended solids in a WWTP?<\/strong><br \/>\nA. Boiling<br \/>\nB. Sedimentation<br \/>\nC. Chlorination<br \/>\nD. Distillation<br \/>\nAnswer: B. Sedimentation<\/p>\n<p><strong>Q22. Which one is a cleaner practice to avoid water pollution?<\/strong><br \/>\nA. Flushing oils in toilets<br \/>\nB. Throwing garbage in drains<br \/>\nC. Using eco-friendly soaps<br \/>\nD. Dumping industrial waste in rivers<br \/>\nAnswer: C. Using eco-friendly soaps<\/p>\n<p><strong>Q23. Which activity generates the most household wastewater?<\/strong><br \/>\nA. Sweeping<br \/>\nB. Watering plants<br \/>\nC. Bathing and washing<br \/>\nD. Reading<br \/>\nAnswer: C. Bathing and washing<\/p>\n<p><strong>Q24. Treated sludge is often used as:<\/strong><br \/>\nA. Fuel<br \/>\nB. Fertilizer<br \/>\nC. Plastic<br \/>\nD. Glass<br \/>\nAnswer: B. Fertilizer<\/p>\n<p><strong>Q25. Which of the following helps control bad smell in wastewater?<\/strong><br \/>\nA. Bleaching powder<br \/>\nB. Vinegar<br \/>\nC. Salt<br \/>\nD. Sugar<br \/>\nAnswer: A. Bleaching powder<\/p>\n<p><strong>Q26. Water in a treatment plant is disinfected mainly by:<\/strong><br \/>\nA. Sand<br \/>\nB. Bacteria<br \/>\nC. Chlorine<br \/>\nD. Sugar<br \/>\nAnswer: C. Chlorine<\/p>\n<p><strong>Q27. A simple method to prevent drain clogging is:<\/strong><br \/>\nA. Pouring boiling water<br \/>\nB. Avoid throwing waste in sinks<br \/>\nC. Adding detergent daily<br \/>\nD. Using acid<br \/>\nAnswer: B. Avoid throwing waste in sinks<\/p>\n<p><strong>Q28. What is the main goal of wastewater treatment?<\/strong><br \/>\nA. Increase its color<br \/>\nB. Add nutrients<br \/>\nC. Make water reusable and safe<br \/>\nD. Remove its smell only<br \/>\nAnswer: C. Make water reusable and safe<\/p>\n<p><strong>Q29. The main function of a septic tank is:<\/strong><br \/>\nA. Heating water<br \/>\nB. Purifying air<br \/>\nC. Treating household sewage<br \/>\nD. Mixing oil<br \/>\nAnswer: C. Treating household sewage<\/p>\n<p><strong>Q30. Which disease can spread due to untreated wastewater?<\/strong><br \/>\nA. Flu<br \/>\nB. Malaria<br \/>\nC. Typhoid<br \/>\nD. Asthma<br \/>\nAnswer: C. Typhoid<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Benefits_of_Practicing_Wastewater_Story_Class_7_MCQs_with_Answers\"><\/span>Benefits of Practicing Wastewater Story Class 7 MCQs with Answers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><strong>Makes Learning Easier and More Fun<\/strong><br \/>\nMCQs turn boring theory into fun quizzes! They help students grasp tricky topics like sewage treatment and clean water processes in a playful and engaging way.<\/li>\n<li><strong>Sharpens Thinking and Recall Skills<\/strong><br \/>\nRegular MCQ practice trains the brain to think fast and recall details like how wastewater is treated, what sludge is, and why sanitation is important.<\/li>\n<li><strong>Saves Time During Revision<\/strong><br \/>\nInstead of re-reading the whole textbook, MCQs give a smart and speedy way to review all key points from the Wastewater Story chapter\u2014perfect for last-minute prep!<\/li>\n<li><strong>Improves Exam Confidence<\/strong><br \/>\nSolving Class 7 Science MCQs helps students get familiar with the question pattern, boosting their confidence to handle actual exam questions with ease.<\/li>\n<li><strong>Matches the CBSE Pattern Perfectly<\/strong><br \/>\nThese questions follow the CBSE Class 7 syllabus and are aligned with NCERT solutions for Class 7 Science, making sure students are always on the right track with their preparation.<\/li>\n<\/ul>\n<\/div>\n<div class=\"sm-table-layout__cell sm-table-layout__cell_align_left\" role=\"cell\" data-testid=\"table-cell-intent\">\n<div class=\"sm-cell-intent\">\n<div class=\"___SBoxInline_orfji-kmt_ sm-cell-intent__tooltip\" data-ui-name=\"Tooltip\"><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Wastewater Story Class 7 MCQ\u200b\u200b: The chapter \u201cWastewater Story\u201d from the CBSE Class 7 syllabus teaches students about how dirty [&hellip;]<\/p>\n","protected":false},"author":53,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"wastewater story class 7 mcq\u200b","_yoast_wpseo_title":"Wastewater Story Class 7 Science MCQ With Answers","_yoast_wpseo_metadesc":"Practice wastewater story class 7 mcq\u200b to boost your understanding of wastewater management. Based on the latest CBSE Syllabus","custom_permalink":"mcqs\/class-7-science-wastewater-story\/"},"categories":[11038],"tags":[],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Wastewater Story Class 7 Science MCQ With Answers<\/title>\n<meta name=\"description\" content=\"Practice wastewater story class 7 mcq\u200b to boost your understanding of wastewater management. 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