单项选择题
A.worn cylinder liner B.faulty cylinder relief valve C.excessive lube oil pressure D.excessive scavenge air pressure
A water jacket is placed around the exhaust manifolds o...
单项选择题A water jacket is placed around the exhaust manifolds of propulsion diesel engines to（）
A.reduce heat radiation to the engine room B.aid in preventing turbocharger overheating C.condense and drain moisture from exhaust gases D.dampen exhaust gas pulsations in the manifold
An increase in diesel engine crankcase pressure general...
单项选择题An increase in diesel engine crankcase pressure generally indicates excessive（）
A.compression pressure B.lube oil header pressure C.scavenge air pressure D.piston ring blow-by
You are inspecting the lower main precision bearings on...
单项选择题You are inspecting the lower main precision bearings on a diesel engine.You observe that about half the thin Babbitt linings are of a milky white colourThis condition is caused by （）
A.large dirt particles in the oil supply B.insufficient lubricating oil and overheating C.normal wear D.water contamination of the lube oil
