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

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

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 （）