单项选择题
A.improper fuel rack positing B.lengthy exhaust valve duration C.extend operation at light load D.excessively early injection timing
One end of a cylinder for a medium or high-speed diesel...
单项选择题One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the （）
A.crankcase B.cylinder head C.valve cover D.engine frame
Which of the diesel engine components listed increase a...
单项选择题Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
A.Impeller B.Compressor C.After-cooler D.Exhaust differ
Lube oil in the fresh water cooling system of a diesel ...
单项选择题Lube oil in the fresh water cooling system of a diesel engine may result from a （）
A.camshaft seizure B.lube oil pump failure C.lube oil cooler failure D.lube oil pump overflow
