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← ScienceWhich outcome weakens lubrication when hydraulic fluid heats?
A)Viscosity reduction lowers pressure capacity✓
B)Fluid darkening increases thermal absorption
C)Additive breakdown causes particle formation
D)Aeration introduces compressible vapor pockets.
💡 Explanation
Reduced viscosity decreases fluid film thickness because decreased shear resistance leads to boundary lubrication rather than hydrodynamic lubrication; therefore, the load-bearing capacity drops, rather than other thermal or chemical degradation modes.
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