单项选择题
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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相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
The correct phase rotation of a three-phase alternator can be checked with a（）
A.dynamometer
B.power factor meter
C.three-phase motor
D.polyphase voltmeter
