{"id":89428,"date":"2025-06-01T10:04:24","date_gmt":"2025-06-01T10:04:24","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89428"},"modified":"2025-06-01T10:04:24","modified_gmt":"2025-06-01T10:04:24","slug":"what-is-the-correct-sequence-for-treatment-of-polluted-surface-water","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/","title":{"rendered":"What is the correct sequence for treatment of polluted surface water ?"},"content":{"rendered":"<p>What is the correct sequence for treatment of polluted surface water ?<\/p>\n<ul>\n<li>1. Disinfection and fluoridation<\/li>\n<li>2. Screening and mixing<\/li>\n<li>3. Flocculation and sedimentation<\/li>\n<li>4. Filtration and sludge processing<\/li>\n<\/ul>\n<p>Select the correct answer using the code given below :<\/p>\n<p>[amp_mcq option1=&#8221;1-2-3-4&#8243; option2=&#8221;3-4-1-2&#8243; option3=&#8221;2-3-4-1&#8243; option4=&#8221;3-2-1-4&#8243; correct=&#8221;option3&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC CAPF &#8211; 2011<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-capf-2011.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-capf-2011\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nThe correct sequence for the typical treatment of polluted surface water from the given options is 2-3-4-1. This corresponds to Screening &#038; mixing, followed by Flocculation &#038; sedimentation, then Filtration &#038; sludge processing, and finally Disinfection &#038; fluoridation.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nThe standard sequence of surface water treatment involves removing large debris (screening), coagulating small particles (mixing, flocculation), settling the flocs (sedimentation), removing remaining suspended particles (filtration), and killing microorganisms (disinfection). Optional steps like fluoridation are added after disinfection. Sludge processing is a parallel or subsequent treatment for the solid waste generated.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nThe complete conventional water treatment process typically includes: 1. Screening (removes large debris), 2. Aeration (optional, adds oxygen), 3. Coagulation (chemicals added to neutralize charges), 4. Flocculation (gentle mixing to form larger flocs), 5. Sedimentation\/Clarification (settling of flocs), 6. Filtration (removes smaller particles), 7. Disinfection (kills pathogens, e.g., chlorination, UV, ozonation), 8. pH adjustment (if needed), 9. Fluoridation (optional, adds fluoride for dental health), 10. Sludge treatment (handling waste from sedimentation and filtration). The provided options represent key stages in this overall process in sequential order.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>What is the correct sequence for treatment of polluted surface water ? 1. Disinfection and fluoridation 2. Screening and mixing 3. Flocculation and sedimentation 4. Filtration and sludge processing Select the correct answer using the code given below : [amp_mcq option1=&#8221;1-2-3-4&#8243; option2=&#8221;3-4-1-2&#8243; option3=&#8221;2-3-4-1&#8243; option4=&#8221;3-2-1-4&#8243; correct=&#8221;option3&#8243;] This question was previously asked in UPSC CAPF &#8211; 2011 &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"What is the correct sequence for treatment of polluted surface water ?\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/#more-89428\">Detailed Solution<span class=\"screen-reader-text\">What is the correct sequence for treatment of polluted surface water ?<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1085],"tags":[1465,1136,1137],"class_list":["post-89428","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1465","tag-environment-and-ecology","tag-pollution","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the correct sequence for treatment of polluted surface water ?<\/title>\n<meta name=\"description\" content=\"The correct sequence for the typical treatment of polluted surface water from the given options is 2-3-4-1. This corresponds to Screening &amp; mixing, followed by Flocculation &amp; sedimentation, then Filtration &amp; sludge processing, and finally Disinfection &amp; fluoridation. The standard sequence of surface water treatment involves removing large debris (screening), coagulating small particles (mixing, flocculation), settling the flocs (sedimentation), removing remaining suspended particles (filtration), and killing microorganisms (disinfection). Optional steps like fluoridation are added after disinfection. Sludge processing is a parallel or subsequent treatment for the solid waste generated.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the correct sequence for treatment of polluted surface water ?\" \/>\n<meta property=\"og:description\" content=\"The correct sequence for the typical treatment of polluted surface water from the given options is 2-3-4-1. This corresponds to Screening &amp; mixing, followed by Flocculation &amp; sedimentation, then Filtration &amp; sludge processing, and finally Disinfection &amp; fluoridation. The standard sequence of surface water treatment involves removing large debris (screening), coagulating small particles (mixing, flocculation), settling the flocs (sedimentation), removing remaining suspended particles (filtration), and killing microorganisms (disinfection). Optional steps like fluoridation are added after disinfection. Sludge processing is a parallel or subsequent treatment for the solid waste generated.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:04:24+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"What is the correct sequence for treatment of polluted surface water ?","description":"The correct sequence for the typical treatment of polluted surface water from the given options is 2-3-4-1. This corresponds to Screening & mixing, followed by Flocculation & sedimentation, then Filtration & sludge processing, and finally Disinfection & fluoridation. The standard sequence of surface water treatment involves removing large debris (screening), coagulating small particles (mixing, flocculation), settling the flocs (sedimentation), removing remaining suspended particles (filtration), and killing microorganisms (disinfection). Optional steps like fluoridation are added after disinfection. Sludge processing is a parallel or subsequent treatment for the solid waste generated.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/","og_locale":"en_US","og_type":"article","og_title":"What is the correct sequence for treatment of polluted surface water ?","og_description":"The correct sequence for the typical treatment of polluted surface water from the given options is 2-3-4-1. This corresponds to Screening & mixing, followed by Flocculation & sedimentation, then Filtration & sludge processing, and finally Disinfection & fluoridation. The standard sequence of surface water treatment involves removing large debris (screening), coagulating small particles (mixing, flocculation), settling the flocs (sedimentation), removing remaining suspended particles (filtration), and killing microorganisms (disinfection). Optional steps like fluoridation are added after disinfection. Sludge processing is a parallel or subsequent treatment for the solid waste generated.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:04:24+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/","url":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/","name":"What is the correct sequence for treatment of polluted surface water ?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:04:24+00:00","dateModified":"2025-06-01T10:04:24+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct sequence for the typical treatment of polluted surface water from the given options is 2-3-4-1. This corresponds to Screening & mixing, followed by Flocculation & sedimentation, then Filtration & sludge processing, and finally Disinfection & fluoridation. The standard sequence of surface water treatment involves removing large debris (screening), coagulating small particles (mixing, flocculation), settling the flocs (sedimentation), removing remaining suspended particles (filtration), and killing microorganisms (disinfection). Optional steps like fluoridation are added after disinfection. Sludge processing is a parallel or subsequent treatment for the solid waste generated.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-correct-sequence-for-treatment-of-polluted-surface-water\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CAPF","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-capf\/"},{"@type":"ListItem","position":3,"name":"What is the correct sequence for treatment of polluted surface water ?"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/89428","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=89428"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/89428\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=89428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=89428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=89428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}