单项选择题
A.high TBN value B.low oil floc point C.low oil demulsibility D.low oil neutralization number
If a used lube oil analysis indicates an excessive chro...
单项选择题If a used lube oil analysis indicates an excessive chromate content, this means （）
A.air filtration is inadequate B.engine coolant leaking into the lube oil C.fuel oil is leaking into the lube oil D.the piston rings are excessively worn
When fuel oil is accidentally missed with lube oil whic...
When fuel oil is accidentally missed with lube oil which of the following processes can be used to separate them?（） Ⅰ.filtering Ⅱ.settling
A.Ⅰ only B.Ⅱ only C.either Ⅰ or Ⅱ D.neither Ⅰ or Ⅱ
A lube oil sample taken from the main engine lube oil s...
单项选择题A lube oil sample taken from the main engine lube oil system has dark yellow opaque color.This is the result of （）
A.water contamination B.mixing oils of two widely different viscosities C.overheating D.aeration
