单项选择题
Worn main bearings in a diesel engine can result in （）
A.decreased compression pressure B.increased lube oil pressure C.lower lube oil temperature D.excessive leakage past the piston rings
单项选择题 When monitoring diesel engine performance, the most useful instrument to use is the （）
单项选择题 Low compression in a diesel engine could be caused by（）
单项选择题 The most common instrument used to measure diesel engine exhaust pressure is the （）
