These books, which you can get at any bookshop, will give you ________ you need.A)

A．励磁线圈与电枢绕组串联或并联连接。

B．励磁线圈与电枢绕组被串联或并联连接。

C．励磁线圈被与电枢绕组被串联或并联连接。

D．通过串联或并联，励磁线圈被连接。

A.are stationary / rotates

B.are stationary /is stationary

C.rotate / is stationary

D.rotate / rotates

A.AC voltage to the armature

B.AC voltage to the field

C.DC voltage to the armature

D.DC voltage to the field

A.they are used

B.the field windings are connected to the load

C.the armature circuit is connected to the load

D.the field windings are connected to the armature circuit

The most common type of AC service generator found aboard ship is the stationary _____.

A.electromagnetic field, revolving armature type

B.electromagnetic field, oscillatory armature type

C.armature, oscillatory electromagnet field type

D.armature, rotating electromagnetic field type

A．exponential

B．integral

C．differential

D．proportional

A.stationary/rotate

B.stationary/stationary

C.rotate/stationary

D.rotate/rotate

A.magnetic amplifier

B.ship's service alternator

C.three-wire DC generator

D.saturable core reactor

The frequency of an alternator at a given RPM is determined by the ______.

A.number of turns of wire in the armature(电枢) coil

B.number of magnetic poles

C.strength of the magnets used

D.output voltage