In case of supersonic flow of a fluid through pipeline, the 'Mach number' is__________________?
Correct answer: D. > 1
- A. 0
- B. 1
- C. < 1
- D. > 1
Explanation
Mach number is the ratio of flow velocity to the local speed of sound. Supersonic flow has velocity greater than the speed of sound, so its Mach number exceeds one.
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