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Which phenomenon causes increased energy dissipation in journal bearings due to diminished lubricant cooling?

A)Viscous shear heating intensifies
B)Adhesive wear rate increases
C)Interfacial tribochemical reaction dominates
D)Rolling contact fatigue accelerates

💡 Explanation

Viscous shear heating occurs because the fluid's viscosity creates friction as layers slide; therefore, reduced lubricant cooling allows temperatures to rise, and the increased energy converts to heat rather than maintaining lower operating temperatures.

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