{"id":5976,"date":"2024-04-15T02:21:58","date_gmt":"2024-04-15T02:21:58","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=5976"},"modified":"2024-04-15T02:21:58","modified_gmt":"2024-04-15T02:21:58","slug":"according-to-is-456-1978-the-fiexural-strength-of-concrete-is-a-directly-proportional-to-compressive-strength-b-inversely-proportional-to-compressive-strength-c-directly-proportional-to-square-r","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/according-to-is-456-1978-the-fiexural-strength-of-concrete-is-a-directly-proportional-to-compressive-strength-b-inversely-proportional-to-compressive-strength-c-directly-proportional-to-square-r\/","title":{"rendered":"According to IS : 456-1978, the fiexural strength of concrete is A. Directly proportional to compressive strength B. Inversely proportional to compressive strength C. Directly proportional to square root of compressive strength D. Inversely proportional to square root of compressive strength"},"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_6a98a3a005c03\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    Directly proportional to compressive strength                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    Inversely proportional to compressive strength                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"true\">\r\n                    Directly proportional to square root of compressive strength                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    Inversely proportional to square root of compressive strength                <\/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: C. <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> Directly proportional to square root of compressive strength.<\/p>\n<p>According to IS : 456-1978, the flexural strength of concrete is directly proportional to the square root of its compressive strength. This means that if the compressive strength of concrete increases by 100%, the flexural strength will increase by 31.6%.<\/p>\n<p>The reason for this relationship is that the flexural strength of concrete is determined by the tensile strength of the concrete. The tensile strength of concrete is much lower than its compressive strength, so the flexural strength is also much lower. However, the tensile strength of concrete is proportional to the square root of its compressive strength. This means <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> that if the compressive strength of concrete increases, the tensile strength will also increase, and the flexural strength will increase as a result.<\/p>\n<p>The following are the explanations for each option:<\/p>\n<ul>\n<li>Option A: Directly proportional to compressive strength. This is not the correct answer because the flexural strength of concrete is not directly proportional to its compressive strength.<\/li>\n<li>Option B: Inversely proportional to compressive strength. This is not the correct answer because the flexural strength of concrete is not inversely proportional to its compressive strength.<\/li>\n<li>Option C: Directly proportional to square root of compressive strength. This is the correct answer because the flexural strength of concrete is directly proportional to the square root of its compressive strength.<\/li>\n<li>Option D: Inversely proportional to square root of compressive strength. This is not the correct answer because the flexural strength of concrete is not inversely proportional to the square root of its compressive strength.<\/li>\n<\/ul>\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":[641],"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>According to IS : 456-1978, the fiexural strength of concrete is A. Directly proportional to compressive strength B. Inversely proportional to compressive strength C. Directly proportional to square root of compressive strength D. 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