A.magnetic amplifier
B.ship’s service alternator
C.three-wire DC generator
D.saturable core reactor
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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
A.melts and must be replaced
B.is enclosed in a tube of insulating material with metal ferrules at each end
C.gives no visual indication of having opened the circuit
D.trips to break the circuit and may be reset
A.brushes on a commutator
B.brushes on slip rings
C.slip rings on a commutator
D.direct connections from the stator
A.heat-resisting acrylic
B.heat-resisting aluminum
C.insulating varnish
D.insulating white lead
A.hydrogen chloride
B.calcium chloride
C.sulfuric acid
D.muriatic acid
最新試題
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
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The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.