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← ScienceWhich consequence results when lubricant temperature drops unexpectedly in precision bearings?
A)Increased viscous drag and power loss✓
B)Reduced hydrodynamic film load capacity
C)Increased lubricant aeration and foaming
D)Decreased bearing material fatigue life
💡 Explanation
Increased lubricant viscosity results in more internal friction during shear, because a temperature drop increases cohesive forces within the fluid itself; therefore greater viscous drag and power loss occur, rather than enhanced load capacity or aeration, which relate to pressure or flow rates.
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