试题与答案

关于二氧化碳焊短路过渡焊接电源极性以下说法正确的是（）。A、一般都应采用直流反接 B

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题型：单项选择题

题目：

关于二氧化碳焊短路过渡焊接电源极性以下说法正确的是（）。

A、一般都应采用直流反接

B、一般都应采用直流正接

C、直流正接和直流反接都很常用

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

考点：建设工程技术与计量（安装工程）第一节切割和焊接第一节切割和焊接题库
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