單項選擇題

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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單項選擇題

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

單項選擇題

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

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

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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 lube oil sample taken from the main engine lube oil system has dark yellow opaque color.This is the result of （）

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When fuel oil is accidentally missed with lube oil which of the following processes can be used to separate them?（）
Ⅰ.filtering
Ⅱ.settling