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← ScienceWhich outcome results when lubricating oil experiences extreme shear?
A)Viscosity reduction occurs, film weakens✓
B)Detergent additives rapidly deplete
C)Surface tension unexpectedly increases rapidly
D)Oxidation accelerates near interfaces only
💡 Explanation
Extreme shear causes *viscosity thinning*: the oil's molecules align, weakening hydrodynamic lubrication because viscosity decreases under load. Therefore, film strength is reduced, rather than other oil breakdown modes occurring that require higher temperatures.
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