试题与答案

水冷系统在加水的过程中如果加有大量的气体,这样对机组的运行是不利的,以下说法正确的有

题型:多项选择题

题目:

水冷系统在加水的过程中如果加有大量的气体,这样对机组的运行是不利的,以下说法正确的有()

A.气体的压缩能力比液体要大,所以对水冷系统的稳压效果有一定的好处

B.在水泵的进水口由于压力偏低,气泡在此处容易破裂,从而容易造成水泵的汽蚀现象

C.由于水冷系统中带有多个自动排气阀,当气体逐渐排出后,系统会因为进阀压力降低而导致机组报进阀压力低故障,从而导致机组停机

D.水泵的机封处主要是靠水来进行润滑的,由于气体的存在会机封处润滑不好,形成干磨现象,从而导致水泵机封处有渗水现象,使机组由于缺水而无法正常运行

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D

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A.无论丙施工企业是否有损失,甲施工企业均应承担违约责任

B.无论丙施工企业是否有损失,甲施工企业均应承担缔约过失责任

C.甲施工企业承担法律责任,以丙施工企业有损失为前提

D.甲施工企业承担法律责任,以乙施工企业有损失为前提

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