单项选择题
A.low loading of that cylinder
B.faulty combustion in that cylinder
C.sluggish piston ring action
D.excessive piston cooling
单项选择题 Engine coolant accumulating in the diesel engine lubricating oil can result from a （）
单项选择题 The device used to limit engine torque at various engine speeds is called a （）
单项选择题 A fuel leak occurs in the high pressure fuel piping between the injection pump and fuel nozzleThis requires immediate repair because of the （）