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
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:把填料放入填料筒时,两根之间的搭口应相互错开()。...
Sunday, September 18, 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
Thursday, September 22, 2022
Thursday, September 22, 2022
Tuesday, September 20, 2022
问题:单选题利用离心泵的基本方程式可以定量地计算出泵的()。A 额定流量B 理论扬程C 轴功率...
Thursday, December 8, 2022
问题:单选题室内固定式开关柜,前后均应标明()。A 格号B 设备编号C 设备(或线路)名称D 设备编号及设备(或线路)名称...
Tuesday, January 31, 2023
问题:电动机在额定出力运行时,相间电压的不平衡不得超过()。...
Wednesday, September 21, 2022
Thursday, September 22, 2022
问题:交流电有效值实质上是交流电压或交流电流的平均值。...
Thursday, September 22, 2022
Thursday, September 22, 2022
Wednesday, September 21, 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
问题:单选题当电力系统发生故障时,保护装置对其保护范围内的故障和不正常工作状态的反映能力,称为继电保护的()A 选择性B 快速性C 可靠性D 灵敏性...
Wednesday, December 7, 2022
Friday, September 16, 2022