单选题One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an （）Adecrease in ignition lagBincrease in fuel economyCreduction in lube oil viscosityDincrease in cylinder misfiring
单选题
One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an （）
A
decrease in ignition lag
B
increase in fuel economy
C
reduction in lube oil viscosity
D
increase in cylinder misfiring
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