单项选择题
Fuel oil injected into the cylinder of a diesel engine just after the piston passes top dead center, will（）
A.increase engine power
B.increase engine load
C.decrease engine power
D.improve fuel economy
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相关考题
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单项选择题
Diesel engine injection lag is caused by（）
A.compressibility of the fuel
B.high fuel oil supply flow
C.scored plunger and barrel packing
D.excessive air turbulence -
单项选择题
Abnormal crankpin bearing and piston skirt surface wear indicate（）
A.a restricted air intake
B.a clogged connecting rod oil passage
C.incorrect connecting rod alignment
D.high cylinder firing temperatures -
单项选择题
Injection lag in a diesel engine may be caused by（）
A.a higher cetane number of fuel oil
B.the diesel fuel used having a high viscosity
C.mechanical rigidity in the lube pump mechanism
D.a decrease rigidity in the fuel pump delivery pressure
