单项选择题
A.Clogged oil pump suction screens B.Increased oil operating temperatures C.Sticking piston rings D.All of the above
High cylinder firing pressure, accompanied by low exhau...
单项选择题High cylinder firing pressure, accompanied by low exhaust temperature, can result from （）
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
