Improperly fitted piston rings in a diesel engine can cause（）<br>A:excessive lube oil consumption<br>B:lower than normal lube oil temperature<br>C:higher than normal exhaust back pressure<br>D:excessive crankshaft end play

Improperly fitted piston rings in a diesel engine can cause（）
A:excessive lube oil consumption
B:lower than normal lube oil temperature
C:higher than normal exhaust back pressure
D:excessive crankshaft end play

出自：海船船员证

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