问题:单选题对称三相电势在任一瞬间的()等于零。A 频率B 波形C 角度D 代数和...
Friday, July 21, 2023
Wednesday, September 21, 2022
Saturday, September 17, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:变压器的检查周期规定,正常运行的变压器每()检查一次。...
Thursday, September 22, 2022
Wednesday, September 21, 2022
问题:单选题离心泵启动时,出口阀门要关闭是为了减小()。A 扬程B 启动功率C 抽出液体量D 流量...
Saturday, October 15, 2022
问题:单选题电路中任意两点电位的差值称为()。A 电势B 电位C 电压D 电动势...
Friday, October 13, 2023
问题:单选题班前会制度是班组安全管理的()手段A 一般B 重要C 强制D 基本...
Thursday, December 8, 2022
Thursday, September 22, 2022
问题:屏蔽电泵型号2.5PW1.44-60中,“P”表示()。...
Thursday, September 22, 2022
Monday, September 19, 2022
问题:判断题水在管道和用水设备中产生的沉积现象叫结垢。A 对B 错...
Thursday, December 8, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:变压器的额定容量,是铭牌上所规定的额定状态下变压器的()。...
Sunday, September 18, 2022
问题:高压供电系统供电电压的正、负偏差的绝对值之和不应超过额定值的()。...
Monday, September 19, 2022
问题:问答题避雷针和避雷器一般防什么雷?打雷时,应离避雷针近一点还是远一点?...
Monday, February 5, 2024