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
点击查看答案&解析
相关考题
-
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 -
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 -
单项选择题
Which of the following problems is the main source of fuel pump and injection system malfunctions?（）
A.Improper lubrication
B.Air in the fuel system
C.Coated fuel lines
D.Excessive vibration
