單項(xiàng)選擇題

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

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

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

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The Total Base Number (TBN) value of diesel engine lube oil refers to its ability to （）

你可能感興趣的試題

One characteristic of a lubricating oil adversely affecting the result of centrifuging is （）

If a used lube oil analysis indicates an excessive chromate content, this means （）