单项选择题X 纠错
A.a leaking fuel injector nozzle
B.a clogged air filter
C.excessively early fuel injection
D.malfunctioning valves
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单项选择题
A.crankcase
B.piston
C.cylinder liner
D.crank cheek
单项选择题
A.discharge exhaust gases and smoke
B.furnish energy to the turbocharger
C.reduce engine room noise
D.all of the above
单项选择题
A.residual carbon deposits
B.lube oil viscosity breakdown
C.uneven heat expansion of the rings
D.uneven heat expansion of the piston
单项选择题
A.one-half engine speed
B.the same as engine speed
C.twice engine speed
D.four times engine speed
单项选择题
A.air intake
B.a fuel outlet
C.cooling water inlets
D.exhausting combustion gas
