单项选择题
A.minimum B.maximum C.leading D.lagging
Which is an acceptable means of correcting high mica be...
单项选择题Which is an acceptable means of correcting high mica between commutator bars?（）
Generator brushes are staggered to（）A.reduce current pu...
单项选择题Generator brushes are staggered to（）
A.reduce current pulsations B.reduce brush chatter C.prevent uneven commutator wear D.allow greater power generation
The voltage output of an AC generator is controlled by（...
单项选择题The voltage output of an AC generator is controlled by（）
A.varying the DC exciter voltage B.varying the reluctance of the air gap C.regulating the speed of the prime mover D.shorting out part of the armature windings
