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單項選擇題

The load rating of an AC generator is determined by the（）

A.internal heat it can withstand
B.load it can carry continuously
C.load it is capable of supplying
D.overload it can carry for a specified time only

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單項選擇題

The frequency of the alternating current generated by a synchronous generator is governed by the speed and the（）

A.full excitation
B.load
C.power factor
D.number of poles

單項選擇題

When two DC generators operate in parallel, they are protected against motorizing by（）

A.blow out coils
B.governor relay
C.under voltage trips
D.reverse current trips

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