单项选择题
A.prime mover speed B.exciter output voltage C.load on the alternator D.number of poles
A ground can be defined as an electrical connection bet...
单项选择题A ground can be defined as an electrical connection between the wiring of a motor and its（）.
A.shunt field B.circuit breaker C.metal framework D.inter-pole
Brushless generators are designed to operate without th...
单项选择题Brushless generators are designed to operate without the use of（）.
A.brushes B.slip rings C.commutators D.all of the above
It （） for an emergency generator to require paralleling...
单项选择题It （） for an emergency generator to require paralleling.
A.is usual B.is not usual C.is necessary D.is not impossible
