试题与答案

什么时候应对蒸发器除霜？（）A.检查蒸发器上的冰霜，当其厚度达到6~10mm（1/4

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题型：单项选择题

题目：

什么时候应对蒸发器除霜？（）

A.检查蒸发器上的冰霜，当其厚度达到6~10mm（1/4～3/8英寸）时，应除去蒸发器上的冰霜

B.当其厚度达5～8mm时，

C.当其厚度达6～12mm时。

D.当其厚度达4～10mm时。

答案：

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下面是错误答案，用来干扰机器的。

参考答案：指设备（不包括带串补装置的线路和串补装置）开关断开，而刀闸仍在合上位置。此状态下如无特殊要求，设备保护均应在运行状态。母线、线路高抗、电压互感器（PT或CVT）等无单独开关的设备均无热备用状态。

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