In the context of fluid dynamics, at what Mach number does flow qualify as hypersonic?

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Subject
Civil Engineering Mcqscivil-engineering-mcqs
Published
23 Jan 2019
Last updated
28 May 2026

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Explanation

Hypersonic flow is generally defined as flow where the Mach number exceeds 4. While supersonic flow begins just above Mach 1, hypersonic flow specifically refers to speeds greater than Mach 4.

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