单项选择题
Which of the following conditions can cause excessive lube oil consumption in a diesel engine?（）
A.Low lube oil temperature B.Dirty lube oil strainer C.Low lube oil pressure D.High lube oil temperature
单项选择题 In the common rail system, excessive pressure in the header may be caused by （）
单项选择题 Diesel engine valve springs function to （）
单项选择题 Worn diesel engine intake valve guides can result in （）
