A steel spring with a mean coil radius of 40 mm consists of 8 active coils and has a wire diameter of 4 mm. The material's modulus of rigidity is 80,000 N/mm². If the initial gap between the coils is 1 mm when no load is applied, what is the minimum compressive force required to close this gap?

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

Given the spring parameters, the minimum compressive load needed to eliminate the 1 mm clearance between coils is calculated as 35 N.

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