A steel rod with a square cross-section and length of 1 meter is subjected to a tensile force of 8 tonnes. The rod elongates by 1 mm. Given that the Young's modulus of steel (E) is 2 × 10^6 kg/cm², what is the length of one side of the rod's cross-section?

Theory of Structures MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Theory of Structurescivil-engineering-mcqs › theory-of-structures
Published
17 Jan 2019
Last updated
28 May 2026

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Explanation

To find the side length of the square rod, use the relation between stress, strain, and Young's modulus. Given the load, extension, and original length, calculate the stress and strain, then determine the cross-sectional area. Finally, compute the side length of the square cross-section. The correct answer is 2 centimeters.

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