Allied & ICAR Exam Bank • ALLIED_1240 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Centrifugal Pumps and Cavitation

Subtopic: Cavitation Threshhold

Question Statement:

Cavitation in an irrigation pump begins when the local absolute pressure at the impeller eye falls below:

Options:

  • (A) The saturation vapor pressure of the liquid at the working temperature
  • (B) Standard atmospheric pressure
  • (C) Zero absolute pressure
  • (D) The delivery head of the pump

Answer Key:

A

Step-by-Step Solution & Explanation

Cavitation occurs when fluid pressure drops to vapor pressure, forming vapor bubbles that subsequently collapse violently against the impeller vanes in higher pressure regions.
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