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← ScienceWhich instability arises when exceeding viscosity limits inside lubrication?
A)Oil whirl causes rotor vibrations✓
B)Increased thermal runaway threshold reached
C)Reduced cavitation damage resistance
D)Improved extreme pressure additive efficacy
💡 Explanation
Oil whirl arises because increased dynamic pressure exceeds the viscosity damping capacity, reducing stability. This causes rotor vibrations; therefore oil whirl is the answer rather than thermal runaway, which involves heating rather than fluid dynamics.
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