【判断题】【消耗次数：1】
电气原理图中主电路用粗实线，控制电路和辅助的信号指示及保护电路用细实线。
①
正确
②
错误
参考答案：
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相关题目
【单选题】
化工制图中图线宽度分粗、中粗、细三种，若粗实线的宽度为d，则细实线的宽度为( )。
①
Normal
0
7.8 磅
0
2
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2d
②
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d
③
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1/2d
④
Normal
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1/4d
随机题目
【单选题】
关于电工仪表的保养，下列说法不正确的是（）。
①
经过长时间使用的仪表，应按电气计量要求，进行必要的检验和校正
②
严格按说明书要求，在温度、湿度、粉尘、振动、电磁场等条件允许范围保存和使用
③
经过长时间存放的仪表，不定期通电检查和驱除潮气
④
不得随意拆卸、调试仪表，否则将影响其灵敏度与准确性