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← ScienceWhich outcome occurs when lubrication oil viscosity decreases rapidly?
A)Increased boundary layer flow separation
B)Elevated engine component wear rates✓
C)Improved heat transfer film coefficient
D)Reduced fluid inertial pressure pulses
💡 Explanation
Decreased viscosity reduces the lubricant's ability to maintain a separating film, triggering adhesive wear via asperities interactions. This is boundary lubrication breakdown because the dominant shear mechanism is friction, therefore wear increases, rather than convective heat transfer changes caused by flow.
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