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Which efficiency loss appears when combustion engine deposits increase?

A)Reduced heat transfer efficiency
B)Increased fuel injection pressure
C)Elevated exhaust valve temperature
D)Diminished cylinder compression ratio

💡 Explanation

Increased deposits on cylinder walls act as insulation, reducing heat flow; therefore, heat is retained in the gases rather than transferred to the cooling system, leading to reduced efficiency because less heat energy is converted to mechanical work.

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