The generator needs not excitation
The winding on the rotor is for inputting excitation current
There are three phase windings on the rotor
The generator has brushes
第1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2题：
describe the procedure to start an emergency generator ?
第3题：
A.1000
B.900
C.700
D.600
第4题：
蒸汽发生器 steam generator
第5题：
"Technologically, the modern buildings are more advanced." This sentence means ______.
A. the ancient architects had no technology
B. the modern architects use more advanced technology
C. the modern buildings are advanced because they are completely different from the ancient buildings
D. the modern buildings are more beautiful
55．答案为B。根据第二段最后的例子可知选项B符合题意。
第6题：
The frequency of an AC generator is controlled by the ___.
A.rheostat
B.governor
C.exciter
D.capacitor
第7题：
Brushless generators are designed to operate without the use of_____.
A.brushes
B.slip rings
C.commutators
D.all of the above
第8题：
The frequency of an AC generator is controlled by the
A.rheostat
B.governor
C.exciter
D.capacitor
第9题：
What will be the phase angle relationship of a six-pole, three-phase, rotating field generator?
A.60
B.120
C.180
D.360
第10题：
英译汉：generator