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Which outcome results during rapid Diesel cycle operation?

A)Incomplete combustion increases significantly
B)Valve timing advances uncontrollably
C)Volumetric efficiency remains maximized
D)Lubricant viscosity is continuously maximized

💡 Explanation

Incomplete combustion increases when the Diesel cycle operates rapidly because the residence time inside the cylinder decreases, limiting the time for complete fuel oxidation, therefore unburnt fuel increases, rather than efficient high speed burning under complete cycles.

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