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← ScienceWhich outcome occurs when a journal bearing operates past design limits?
A)Increased bearing friction and heat✓
B)Stable lubricant film and cooling
C)Reduced vibration from the shaft
D)Improved load distribution over area
💡 Explanation
Increased bearing friction and heat occurs when viscosity shear leads to turbulent flow in the bearing. Lubricant starvation reduces the oil's capacity to remove frictional heat because increased friction raises the temperature faster than oil circulation, therefore this scenario risks rapid wear rather than improved performance.
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