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單項選擇題

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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單項選擇題

The frequency of an AC generator is controlled by the （）

A.rheostat
B.governor
C.exciter
D.capacitor

單項選擇題

Capacitance is the property of an electric circuit opposing a change in the （）

A.current in the circuit
B.voltage in the circuit
C.inductance in the circuit
D.resistance in the circuit