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單項選擇題

The division of the kilowatt load between two AC generators operating in parallel is controlled by the settings and characteristics of the （）.

A.voltage regulators
B.field rheostats
C.reverse power relays
D.prime mover governors

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單項選擇題

In a three-phase circuit, the phase voltages are （）

A.120°apart
B.160°apart
C.180°apart
D.360°apart

單項選擇題

The frequency of an alternator at a given RPM is determined by the （）.

A.number of turns of wire in the armature coil
B.number of magnetic poles
C.strength of the magnets used
D.output voltage

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