You are attempting to parallel two AC generators, and the syncope pointer is revolving in the fast directionThis indicates that the frequency of the incoming machine is （）.<br>A:higher than the bus frequency<br>B:lower than the bus frequency<br>C:the same as the bus frequency but out of phase with it<br>D:the same as the bus frequency and the circuit breaker may be closed at any pointer position

You are attempting to parallel two AC generators, and the syncope pointer is revolving in the fast directionThis indicates that the frequency of the incoming machine is （）.
A:higher than the bus frequency
B:lower than the bus frequency
C:the same as the bus frequency but out of phase with it
D:the same as the bus frequency and the circuit breaker may be closed at any pointer position

出自：海船船员证

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10244552】个 (题库试题定时更新)