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Which outcome results when lubricating oil viscosity decreases inside an axial piston hydraulic pump?

A)Increased internal leakage rate
B)Decreased pump volumetric efficiency
C)Elevated fluid film rigidity
D)Reduced wear debris generation

💡 Explanation

Reduced viscosity lowers the oil's resistance to flow. This increases the internal leakage rate because the increased flow exits via gaps, rather than maintaining intended pressure; therefore, internal leakage increases, rather than creating rigid films.

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