单项选择题
One characteristic of a lubricating oil adversely affecting the result of centrifuging is （）
A.high TBN value
B.low oil floc point
C.low oil demulsibility
D.low oil neutralization number
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相关考题
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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 -
单项选择题
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 -
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
