单项选择题
A.a high viscosity index B.a low viscosity index C.neutralize acids D.resist oxidation at high temperatures
The Total Base Number (TBN) value of diesel engine lube...
单项选择题The Total Base Number (TBN) value of diesel engine lube oil refers to its ability to （）
A.resist changes in viscosity with changes in temperature B.resist emulsification C.neutralize acids D.resist oxidation at high temperatures
One characteristic of a lubricating oil adversely affec...
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
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
