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Which mechanism reduces the efficiency of a Diesel cycle engine during rapid acceleration?

A)Incomplete combustion due to transient fuel surge
B)Increased heat loss through cylinder walls
C)Elevated friction within the fuel injector
D)Delayed valve timing due to thermal expansion

💡 Explanation

When rapidly accelerating, transient fuel supply causes incomplete combustion to be more likely because maintaining an perfect air-fuel ratio becomes more challenging, thus unburnt hydrocarbons increase and decreases efficiency.. Therefore, incomplete conbustion results decreases the efficiency.

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