A.wasted energy
B.efficient operation
C.a short in the exciter field windings
D.an excessive number of minor system grounds
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A.increase
B.not change
C.decrease
D.be exactly 60 hertz
A.alternating current
B.omnidirectional current
C.direct current
D.sinusoidal current
A.result in immediate power outages
B.damage circuit breakers
C.appear on the ground detection system
D.damage insulation and may cause outages
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
A.Trip the generator off the switchboard
B.Turn off all electrical equipment
C.Remove the load from the "off going" generator
D.Increase the cycles of the generator staying on the line
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If separating effect is not good, which measure should be taken （）
（） is not installed on the main switchboar.
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