单项选择题
Diesel engine crankshaft deflection readings are generally taken at four crank positionsGood engineering practice requires the deflection gage or indicator to be（）
A.placed as near the crankpin axis as possible
B.removed each time the crankshaft is repositioned
C.left in place for all four readings
D.reset to zero for all four readings
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相关考题
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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 -
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
