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← TechnologyWhich outcome occurs when positive displacement pump clearance increases excessively due to wear?
A)Volumetric efficiency decreases significantly✓
B)Motor torque demand becomes unstable
C)Fluid viscosity increases unexpectedly
D)System pressure oscillates at high frequency
💡 Explanation
When clearance increases, fluid backflow (slippage) increases because the pressure difference between the pump's outlet and inlet is amplified greatly relative to the tiny channels within pump. Therefore the volumetric efficiency suffers, rather than motor torque, viscosity change, or pressure oscillation which demand alternative effects.. .
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