In case of a pipe of constant cross-sectional area, the maximum fluid velocity obtainable is___________________?
Correct answer: A. The velocity of sound
- A. The velocity of sound
- B. Dependent on its cross-sectional area
- C. Dependent on fluid viscosity
- D. Dependent on fluid density
Explanation
For a constant-area passage, the limiting maximum velocity in compressible flow is the sonic velocity, corresponding to Mach number one. Beyond this point, choking prevents further increase in mass flow under the same upstream conditions.
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