Why are connecting rod bolts tightened with an initial tension greater than the external load?

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

PPSCFPSCNTSPakistan govt jobs
Subject
Machine Designmechanical-engineering-mcqs › machine-design
Published
26 Jan 2019
Last updated
28 May 2026

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Explanation

Applying an initial tension higher than the external load ensures that the bolt's total load is not influenced by fluctuating external cyclic loads, thereby maintaining joint integrity.

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