单项选择题
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
A substantial increase in crankcase pressure could be a...
单项选择题A substantial increase in crankcase pressure could be an indication of （）
A.excessive lube oil pressure B.the proper seating of new rings C.a worn cylinder liner D.a malfunctioning cylinder relief valve
Scuffed cylinder liner wearing surfaces in a diesel eng...
单项选择题Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）
A.starting the engine while hot B.knurling the piston skirt C.operating the engine overheated D.scuff resistant piston rings
