单项选择题
A.the exhaust will be clear
B.fuel consumption will be low
C.all the fuel will be burned at top dead center
D.fuel consumption will be high
单项选择题 In a diesel engine, when installing new piston rings it is important to check（） Ⅰ.ring gap clearance Ⅱ.side clearance
单项选择题 At bottom dead center, the centerline of the connecting rod usually coincides with the（）
单项选择题 Which of the following problems represent one possible cause of high lube oil consumption in a four stroke diesel engine?（）