单项选择题
Worn diesel engine intake valve guides can result in （）
A.increased engine breathing efficiency B.excessive valve lash C.excessive lube oil consumption D.lower than normal fuel consumption
单项选择题 If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?（）
单项选择题 Excessive piston ring wear in a diesel engine will cause（）
单项选择题 In the voyage, when carrying out abandon ship drill, should be test every time（）.
