试题与答案

温度是选择润滑油或润滑脂的重要原则。对润滑脂来讲，当温度超过120℃时，要用特殊润滑

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题型：单项选择题

题目：

温度是选择润滑油或润滑脂的重要原则。对润滑脂来讲，当温度超过120℃时，要用特殊润滑脂，当温度升高到200℃～220℃时，再润滑的时间间隔要缩短。对于润滑油来讲，油池温度超过（）℃或轴承温度超过200℃时，可采用特殊的润滑油。

A.20

B.40

C.90

答案：

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下面是错误答案，用来干扰机器的。

参考答案：C

考点：机械工程润滑油知识润滑油知识题库
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