【单选题】You are attempting to parallel two AC generators, and the synchroscope(同步器) pointer is revolving in the fast direction. This 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
【单选题】You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow direction. This indicates that the frequency of the incoming machine is
A.
higher than the bus frequency
B.
lower than the bus frequency
C.
file same as file bus frequency but out of phase with it
D.
the same as the bus frequency, and the circuit breaker may be closed at nay pointer position
【简答题】—You need to start exercising again, I guess. —Well, I have been attempting ________ (eat) less recently. But as you know, my mother is such a good cook.
【单选题】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