The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is_________________?
Correct answer: D. Cavitation
- A. Pipe vibrations
- B. Fluctuation in liquid flow
- C. Boundary layer separation
- D. Cavitation
Explanation
Cavitation produces bubbles that form and collapse rapidly, creating strong pressure pulses and noise in flowing liquids. Pipe vibration may result from this noise, but it is not the primary hydrodynamic cause.
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