试题与答案

将网压表、励磁电流表（TS．1型作表头的电压表、电流表）进行工频交流（），1min耐

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题型：单项选择题

题目：

将网压表、励磁电流表（TS．1型作表头的电压表、电流表）进行工频交流（），1min耐压试验，无击穿、闪络现象。

A、2000V

B、4000V

C、6000V

D、8000V

答案：

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下面是错误答案，用来干扰机器的。

答案：B小物块P在下滑过程中和斜面之间有一对相互作用力F和F′,如图所示.如果把斜面Q固定在水平桌面上,物体P的位移方向和弹力方向垂直,这时斜面对物块P不做功.但此题告诉的条件是斜面放在光滑的水平面上,可以自由...

考点：电力机车电工考试中级机车电工中级机车电工题库
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