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Which consequence results when cylinder wall lubrication fails in a reciprocating engine?

A)Increased energy dissipated as heat
B)Reduced exhaust NOx pollutant formation
C)Improved engine thermal efficiency overall
D)Decreased unburned fuel in exhaust

💡 Explanation

Increased friction from lubrication failure causes more energy to be lost as heat internally via enhanced molecular kinetic energy; this is because more kinetic energy converts to disorganized energy via friction (a dissipation process), therefore energy converts to heat rather than being available to do any useful work within the system.

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