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Which outcome occurs when high-viscosity lubricating oil within journal bearings experiences increased shear?

A)Increased asperity contact pressure
B)Reduced hydrodynamic film thickness
C)Elevated lubricant film temperature
D)Decreased shaft load capacity

💡 Explanation

Increased shear in viscous oils causes viscous dissipation within the lubricating film of the bearing. This mechanism converts mechanical energy into heat because viscous forces oppose fluid motion, therefore the lubricant temperature rises, rather than some change in mechanical properties which may involve film thickness.

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