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← ScienceWhich consequence results when viscosity increases significantly in lubrication described by the Hagen-Poiseuille equation?
A)Increased pump energy and heat✓
B)Decreased cavitation risk and noise
C)Improved flow meter accuracy
D)Reduced bearing material fatigue
💡 Explanation
Higher viscosity causes a greater pressure drop to maintain flow rate because the increased internal fluid friction generates more resistance, leading to higher pumping energy input; therefore, increased heat generation occurs, rather than reduced wear, since lubrication suffers.
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