单项选择题
A.overheated injection pumps B.water condensed in the cylinders C.fuel dilution of the lube oil D.air in the fuel system
Before starting a diesel engine, you should always（）A.c...
单项选择题Before starting a diesel engine, you should always（）
A.check the pyrometer readings B.check the crankcase oil level C.check the fuel oil strainers D.clean the fuel system
Sludge formation in a diesel engine lube oil system is ...
单项选择题Sludge formation in a diesel engine lube oil system is caused by（）
A.carbonization of oils from the combustion chambers B.emulsions of lube oil and water C.coagulation of unburned fuel below the piston rings D.all of the above
A diesel engine is turned at normal cranking speed, but...
单项选择题A diesel engine is turned at normal cranking speed, but fails to fireThis can occur from （）
A.low lube oil temperature B.low starting air temperature C.air in the fuel injection D.water in the starting air system
