{"id":7354,"date":"2024-04-15T02:43:31","date_gmt":"2024-04-15T02:43:31","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=7354"},"modified":"2024-04-15T02:43:31","modified_gmt":"2024-04-15T02:43:31","slug":"the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq\/","title":{"rendered":"The scour depth D of a river during flood, may be calculated from the Lacey&#8217;s equation A. D = 0.47 $$\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)$$ B. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{2}}}$$ C. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{3}}}$$ D. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{2}{3}}}$$"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6a99514cd41ee\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    D = 0.47 $$left( {\frac{{\text{Q}}}{{\text{f}}}} \right)$$                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    D = 0.47 $${left( {\frac{{\text{Q}}}{{\text{f}}}} \right)^{\frac{1}{2}}}$$                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    D = 0.47 $${left( {\frac{{\text{Q}}}{{\text{f}}}} \right)^{\frac{1}{3}}}$$                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"true\">\r\n                    D = 0.47 $${left( {\frac{{\text{Q}}}{{\text{f}}}} \right)^{\frac{2}{3}}}$$                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is: D. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{2}{3}}}$$<\/p>\n<p>Lacey&#8217;s equation is a formula used to calculate the scour depth of a river during flood. The equation is:<\/p>\n<p>$$D = 0.47 \\left( \\frac{Q}{f} \\right)^{\\frac{2}{3}}$$<\/p>\n<p>where:<\/p>\n<ul>\n<li>$D$ is the scour depth, in meters<\/li>\n<li>$Q$ is the discharge of the river, in cubic meters per second<\/li>\n<li>$f$ is the friction factor, which is a dimensionless number that depends on the type of bed material and the flow conditions<\/li>\n<\/ul>\n<p>The equation is based on the assumption that the scour depth is proportional to the square root of the discharge and the cube root of the friction factor. This assumption is based on experimental data, and it has been shown to be accurate for a wide range of conditions.<\/p>\n<p>The equation can be used to estimate the scour depth of a river during flood. However, it is important to note that the equation is only an approximation, and the actual scour depth may be different from the value calculated by the equation. The equation should be used with caution, and it is always best to consult with a professional <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> engineer when designing a river or stream.<\/p>\n<p>The other options are incorrect <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> because they do not represent the correct formula for Lacey&#8217;s equation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Join Our Telegram Channel Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[649],"tags":[],"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>The scour depth D of a river during flood, may be calculated from the Lacey&#039;s equation A. D = 0.47 $$\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)$$ B. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{2}}}$$ C. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{3}}}$$ D. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{2}{3}}}$$<\/title>\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\/the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The scour depth D of a river during flood, may be calculated from the Lacey&#039;s equation A. D = 0.47 $$\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)$$ B. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{2}}}$$ C. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{3}}}$$ D. 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D = 0.47 $$\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)$$ B. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{2}}}$$ C. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{3}}}$$ D. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{2}{3}}}$$","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\/the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq\/","og_locale":"en_US","og_type":"article","og_title":"The scour depth D of a river during flood, may be calculated from the Lacey's equation A. D = 0.47 $$\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)$$ B. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{2}}}$$ C. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{3}}}$$ D. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{2}{3}}}$$","og_description":"Join Our Telegram Channel Subscribe on YouTube","og_url":"https:\/\/exam.pscnotes.com\/mcq\/the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2024-04-15T02:43:31+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\/the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq\/","url":"https:\/\/exam.pscnotes.com\/mcq\/the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq\/","name":"The scour depth D of a river during flood, may be calculated from the Lacey's equation A. D = 0.47 $$\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)$$ B. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{2}}}$$ C. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{3}}}$$ D. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{2}{3}}}$$","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2024-04-15T02:43:31+00:00","dateModified":"2024-04-15T02:43:31+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/the-scour-depth-d-of-a-river-during-flood-may-be-calculated-from-the-laceys-equation-a-d-0-47-left-fractextqtextf-right-b-d-0-47-left-fractextq\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"mcq","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/"},{"@type":"ListItem","position":3,"name":"Civil engineering","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/civil-engineering\/"},{"@type":"ListItem","position":4,"name":"Irrigation engineering","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/civil-engineering\/irrigation-engineering\/"},{"@type":"ListItem","position":5,"name":"The scour depth D of a river during flood, may be calculated from the Lacey&#8217;s equation A. D = 0.47 $$\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)$$ B. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{2}}}$$ C. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{1}{3}}}$$ D. D = 0.47 $${\\left( {\\frac{{\\text{Q}}}{{\\text{f}}}} \\right)^{\\frac{2}{3}}}$$"}]},{"@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\/d97f17072bfa490596c8f78363955d55?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d97f17072bfa490596c8f78363955d55?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\/7354"}],"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=7354"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/7354\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=7354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=7354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=7354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}