【单选题】
The frequency of an alternator is controlled from the main switchboard by adjusting the（）
A、frequency meter
B、voltage regulator
C、governor control
D、sychroscope switch
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搜题
更多“The frequency of an alternator is controlled from the main switchboard by adjusting the（）”相关的问题
第2题
A、relative speed of the rotor poles B、number of turns of wire in the armature coil C、strength of the magnets used D、output voltage
第3题
A、relative speed of the rotor poles B、number of turns of wire in the armature coil C、strength of the magnets used D、output voltage
第4题
A、number of turns of wire in the armature coil B、number of magnetic poles C、strength of the magnets used D、output voltage
第5题
A、number of turns of wire in the armature coil B、number of magnetic poles C、strength of the magnets used D、output voltage
第6题
A、number of turns of wire in the armature coil B、number of magnetic poles C、strength of the magnets used D、output voltage
第7题
A、slightly less than the line frequency B、the same as the line frequency C、slightly greater than the line frequency D、All of the above
第8题
A、increase the field excitation B、decrease the field excitation C、increase the number of magnetic poles D、increase the speed of the prime mover
第9题
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
