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← ScienceWhich outcome occurs when lubricating oil in a hydraulic system experiences increased shear rate?
A)Viscosity decreases via shear thinning✓
B)Fluid elasticity reaches critical limit
C)Thermal expansion saturates entirely stably
D)Bulk modulus shifts toward incompressibility
💡 Explanation
Viscosity decreases sharply because shear thinning is occurring, a non-Newtonian behaviour where increased shear reduces the fluid's resistance to flow. Consequently, the oil performs more poorly, rather than showing elasticity because thermal expansion and bulk modulus are secondary effects.
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