单项选择题
A fuse that blows often should be replaced only with a fuse of （）.
A.the recommended current and voltage rating
B.higher current and voltage rating
C.higher current and lower voltage rating
D.lower current and higher voltage rating
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单项选择题
A constant output voltage from an AC generator is maintained by the （）.
A.prime mover governor
B.exciter generator
C.voltage regulator
D.reverse power relay -
单项选择题
What type of rotor is used in split-phase motors?（）
A.Dram
B.Salient pole
C.Squirrel-cage
D.Wound-rotor -
单项选择题
The load sharing characteristics of two diesel generator operating in parallel are mostly dependent on their governor （）.
A.load limit settings
B.idle speed settings
C.speed limit settings
D.speed droop settings
