單項(xiàng)選擇題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


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1.單項(xiàng)選擇題What type of rotor is used in split-phase motors?()

A.Dram
B.Salient pole
C.Squirrel-cage
D.Wound-rotor

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題The first requirement for logical troubleshooting of any system is the ability to ().

A.collect all available data on a casualty
B.recognize normal operation
C.identify the probable cause of a symptom
D.isolate the faulty component

4.單項(xiàng)選擇題An electrical device which employs a stationary armature and a rotating electromagnetic field is used aboard ship as a ().

A.magnetic amplifier
B.ship’s service alternator
C.three-wire DC generator
D.saturable core reactor

5.單項(xiàng)選擇題As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to ().

A.draw a one line diagram of the circuitry
B.test all fuses and measure the line voltage
C.take megger readings
D.insulate the apparatus from ground