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Which outcome occurs in a lubrication system when oil viscosity significantly increases from expected values?

A)Increased power consumption results
B)Reduced shaft rotational velocity
C)Higher heat transfer efficiency
D)Enhanced oil film thickness forms

💡 Explanation

Increased oil viscosity leads to higher shear stresses and viscous drag within the lubricant film; the **viscous friction** converts input power into heat, because more energy is expended to overcome the increased resistance; therefore, power consumption goes up rather than decreased lubrication because film formability less dominates.

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