Which system behavior indicates cavitation in a variable displacement axial piston hydraulic pump?

💡 Explanation

When vapor bubbles form and collapse in the pump, cavitation occurs because the local pressure drops below the saturation pressure, causing fluctuating flow and sharp implosion noises due to pressure waves. Therefore erratic flow with knocking results, rather than gradual loss of precision, temperature rise, or pressure increase which occur for other pump malfunctions.

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