【判断题】
使用电振捣器捣固前，其外壳必须可靠接地。
A. 对
B. 错
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答案
A
解析
暂无解析
相关试题
【判断题】
已知接触网某定位点接触线高度为6000mm，拉出值为400mm，外轨超高为60mm，则该定位点接触线的位置是接触线的投影位置，在线路中心至外轨间，距离线路中心150mm处。
A. 对
B. 错
【判断题】
某区间已知定位点导高H=6000mm，L=1440mm，h=60mm，现场实测得定位处接触线投影在线路中心距外轨间距线路中心100mm处，则现场拉出值应调整，应使定位处接触线位置向外轨方向“拉”250mm。
A. 对
B. 错
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