单项选择题
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
单项选择题 In a three-phase circuit, the phase voltages are （）
单项选择题 The frequency of an alternator at a given RPM is determined by the （）.
单项选择题 The pushbutton on the handset of a ships sound-powered telephone must be depressed to （）.
