题目内容

发电机励磁回路发生一点接地时，应投入励磁回路两点接地保护.

A. 正确
B. 错误

查看答案

搜索结果不匹配？点我反馈

更多问题

母线如无明显故障，可用发电机零起升压或选用适当电源线试送.

A. 正确
B. 错误

查看答案

Customer X has a hub-and-spoke Frame Relay network， with a central office and two branch offices（RemoteA and RemoteB）. Each location has only one physical link to the Frame Relay cloud and RemoteB has a router that is not a Cisco router. Since the installation，there is no connectivity between RemoteB and the central office. What is a possible solution to this issue？（）

A. Because Frame Relay IETF encapsulation is only configurable at interface level， you must use IETF encapsulation on all routers.
B. This is not a possible scenario. A dedicated Frame Relay link to RemoteB is mandatory at the central office.
C. The router at RemoteB must be replaced by a Cisco router.
D. Use Frame Relay IETF encapsulation on a per-VC basis on the central office router.
E. There is a problem in the Frame Relay cloud， because Cisco routers are compatible with IETF Frame Relay.

查看答案

50060000的读法，结果正确的是（）

A. 五千零六万
B. 五百万六千
C. 五亿零六万

查看答案

试述三相异步电机的串极调速原理

查看答案

发电机励磁回路发生一点接地时，应投入励磁回路两点接地保护.

A. 正确 B. 错误

母线如无明显故障，可用发电机零起升压或选用适当电源线试送.

50060000的读法，结果正确的是（）

试述三相异步电机的串极调速原理

A. 正确
B. 错误