单项选择题
A.increase blow-by in all cylinders
B.incomplete combustion in all cylinder
C.overloading in all cylinders
D.insufficient fuel delivery to all cylinders
单项选择题 The pressure differential across a diesel engine lube oil system duplex filter should be checked to （）
单项选择题 Which of the following statements concerning the lubrication of diesel propulsion engines used in vessels over 300 gross tons is most accurate?（）
单项选择题 If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is （）