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← ScienceWhich outcome occurs when lubricant at low temperature?
A)Increased viscous drag within bearings✓
B)Reduced hydrostatic pressure in seals
C)Enhanced turbulent flow in channels
D)Minimal effect engine overall performance
💡 Explanation
Increased viscous drag occurs because lower temperatures raise the oil's viscosity via increased intermolecular cohesive forces. This directly elevates the fluid's shear resistance within the bearing, therefore more mechanical power is converted to thermal energy to overcome rather than enabling efficient motion.
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