单项选择题X 纠错
A.worn or broken cylinder liner sealing rings
B.high cooling water temperature
C.worn or broken piston rings
D.low fuel oil pressure
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单项选择题
A.pyrometer
B.bourdon gauge
C.pneumercator
D.manometer
单项选择题
A.a leaking fuel injector nozzle
B.a clogged air filter
C.excessively early fuel injection
D.malfunctioning valves
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
单项选择题
A.poor cooling of cylinder walls
B.improper cooling of the piston
C.insufficient piston lubrication
D.all of the above
单项选择题
A.natural aspiration
B.masked intake valves
C.air cells
D.scavenging air
单项选择题
A.excessive lube oil consumption
B.lower than normal lube oil temperature
C.higher than normal exhaust back pressure
D.excessive crankshaft end play