What is the equation representing a parabolic arch defined by its span and rise?

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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Choose the correct answer

Explanation

The formula for a parabolic arch based on its span (l) and rise (h) is given by y = (4h / l²) × (1 – x), where y represents the height at a horizontal position x. Options A, B, and C use incorrect coefficients, making option D the correct expression.

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