an exciter driven by the same shaft with the generator
an exciter driven by external prime mover
generator itself
either A and B
第1题：
An electrical device which employs a stationary armature and a rotating electromagnetic field is used aboard as a
A.magnetic amplifier
B.ship's service alternator
C.three-wire DC generator
D.saturable core reactor
第2题：
In a modern three-phase A.C. synchronous brushes generator, the excitation winding is on the rotor. That means .
A.The generator need not excitation.
B.The winding on the rotor is for inputting excitation current.
C.There are three phase windings on the rotor.
D.The generator has no brushes.
第3题：
A.prime mover speed
B.number of energized main motor poles
C.propulsion generator field strength
D.electric coupling field strength
第4题：
jim has created a field hint for the address field. Users tell him this text disappears when they click in the address field. which one of the following is most likely reason?（）
第5题：
Brushless generators are designed to operate without the use of_____.
A.brushes
B.slip rings
C.commutators
D.all of the above
第6题：
The division of kilowatt load between two paralleled alternators is determined by the
A.amount of field excitation of the leading machine
B.load-speed characteristics of the governors
C.amount of field excitation to the lagging machine
D.type of alternator
第7题：
肾病综合征病人的尿蛋白大多( )
A、>3.5g/d
B、>2.0g/d
C、<3.5g/d
D、<2.0g/d
E、<1.0g/d
第8题：
第9题：
Synchronous同步
第10题：
SONET全称为（）