{"id":7602,"date":"2024-04-15T02:47:33","date_gmt":"2024-04-15T02:47:33","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=7602"},"modified":"2024-04-15T02:47:33","modified_gmt":"2024-04-15T02:47:33","slug":"if-n-is-the-rugosity-coefficient-r-is-the-hydraulic-depth-s-is-the-bed-slope-of-sewer-the-velocity-of-flow-in-m-sec-may-be-obtained-by-the-formula-textv-frac1textntextr","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/if-n-is-the-rugosity-coefficient-r-is-the-hydraulic-depth-s-is-the-bed-slope-of-sewer-the-velocity-of-flow-in-m-sec-may-be-obtained-by-the-formula-textv-frac1textntextr\/","title":{"rendered":"If n is the rugosity coefficient, r is the hydraulic depth, s is the bed slope of sewer, the velocity of flow in m\/sec may be obtained by the formula $${\\text{V}} = \\frac{1}{{\\text{n}}}{{\\text{r}}^{\\frac{2}{3}}}{{\\text{s}}^{\\frac{1}{2}}}$$ evolved by A. Chezy B. Manning C. Bazin D. Kutter"},"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_6a9ad02412a20\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    Chezy                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"true\">\r\n                    Manning                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    Bazin                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    Kutter                <\/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: B. Manning<\/p>\n<p>The Manning formula is a semi-empirical formula used to calculate the mean velocity of water flow in open channels. It is named after Robert Manning, an Irish engineer who developed it in 1890. The formula is given by:<\/p>\n<p>$$V = \\frac{1}{n} R^{2\/3} S^{1\/2}$$<\/p>\n<p>where:<\/p>\n<ul>\n<li>$V$ is the mean velocity of water flow in m\/s<\/li>\n<li>$n$ is the Manning roughness coefficient<\/li>\n<li>$R$ is the hydraulic radius in m<\/li>\n<li>$S$ is the bed slope of the channel in m\/m<\/li>\n<\/ul>\n<p>The Manning roughness coefficient is a dimensionless number that accounts for the roughness of the channel bed and sides. It is typically determined experimentally, but it can also be estimated from tables <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 <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> 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> or charts. The hydraulic radius is defined as the cross-sectional area of the channel divided by the wetted perimeter. The bed slope is the ratio of the change in elevation to the horizontal distance along the channel.<\/p>\n<p>The Manning formula is widely used in hydraulic engineering applications. It is relatively simple to use and can be applied to a wide range of channels. However, it is important to note that the formula is only a semi-empirical formula, and it should not be used for critical applications.<\/p>\n<p>The other options are incorrect because they are not the names of the engineers who developed the Manning formula.<\/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":[650],"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>If n is the rugosity coefficient, r is the hydraulic depth, s is the bed slope of sewer, the velocity of flow in m\/sec may be obtained by the formula $${\\text{V}} = \\frac{1}{{\\text{n}}}{{\\text{r}}^{\\frac{2}{3}}}{{\\text{s}}^{\\frac{1}{2}}}$$ evolved by A. Chezy B. 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