In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes_______________?
Correct answer: C. Less than liquid vapor pressure
- A. Less than atmospheric pressure
- B. More than liquid vapor pressure
- C. Less than liquid vapor pressure
- D. More than atmospheric pressure
Explanation
Cavitation starts when the local absolute pressure falls below the liquid's vapour pressure, allowing vapour bubbles to form. Atmospheric pressure is not the governing threshold inside the impeller eye or at the vane inlet.
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