[名词解释] 标称电压(nominal voltage)
[名词解释] 故障电压(fault voltage)
[名词解释] 额定功率密度 rated power density
[名词解释] 接触电压限值(touch voltage limit)
[名词解释] 特低电压(extra-low-voltage或ELV)
[单选题]When voltage and current developed in an AC circuit reach their peak values at the same time, the power factor is _____.A.laggingB.leadingC.maximumD.minimum
[名词解释] 英译汉:voltage
[单选题]()的英语是voltage。A . 电压B . 电阻C . 电流D . 电器
[单选题]Suppose the rated capacity of the main engine of a ship is 10,000 KW at 100 rated rpm, then when at 80 rpm its capacity should be ().A . 800 KWB . 5120 KWC . 6400 KWD . 4180 KW
[单选题]发电机额定电压比线路额定电压()。A . 高5℅B . 低5℅C . 相等