Engine : Electricity - 356/1386 |
---|
« Previous Question |
In comparison to a main switchboard for a DC electrical distribution system, a main switchboard for an AC electrical distribution system requires the use of which of the following devices, whereas a DC main switchboard does not? |
A) Voltage regulator and prime mover governor speed controls |
B) Reverse power or current relays |
C) Frequency meter, power factor or reactive power meters, and synchronizing lamps or synchroscope |
D) Generator and load center circuit breakers |
loading answer...
Comments |
---|
There are no comments for this question. |