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


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1.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

2.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