单项选择题
A.Excessive cylinder liner
B.water in the fuel system
C.Cracked cylinder liner
D.Leaking lube oil cooler
单项选择题 While inspecting the main bearings on a diesel engine you find impregnated dirt and scratches in the bearing surface you would, therefore, suspect that （）
单项选择题 Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）
单项选择题 If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）