单项选择题
A.Dirty lube oil filter B.Too much piston ring wear C.High lube oil viscosity D.Low lube oil temperature
Which of the following operational conditions will occu...
单项选择题Which of the following operational conditions will occur to the diesel engine lube oil at extremely high temperature?（）
A.The oil oxidizes and forms carbon deposits B.The viscosity increases C.Engine oil consumption decreases D.Lubricating qualities of the oil are enhanced
The oxidation by-products forming in diesel engine lube...
单项选择题The oxidation by-products forming in diesel engine lube oil can cause （）
A.pitting B.sludge C.hard varnish D.all of the above
Surface irregularities, such as erosion and pitting on ...
单项选择题Surface irregularities, such as erosion and pitting on injection pump plungers, will（）
A.increase ignition delay B.affect fuel oil metering C.affect engine performance at low speed D.only disappear due to fuel oil abrasion
