单项选择题
A.Through the crankcase exhauster
B.As water vapor contained in blow-by
C.Demulsifying lube oil passing through the main bearings
D.Condensation from vapor formed in the expansion tank
单项选择题 Standby or emergency diesel generator day tanks should always be kept full to reduce the possibility of（）
单项选择题 If water is found in the crankcase of a diesel engine, the cause may be due to（）
单项选择题 Following an overhaul of a crosshead type diesel engine, the engine is jacked over with the turning gear as part of the pre-start procedure, which of the listed pre-start procedures should be carried out?（）