A.prime mover speed
B.exciter output voltage
C.load on the alternator
D.number of poles
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A.shunt field
B.circuit breaker
C.metal framework
D.inter-pole
A.brushes
B.slip rings
C.commutators
D.all of the above
A.is usual
B.is not usual
C.is necessary
D.is not impossible
A.protective earth
B.isolators
C.ground switch
D.circuit-breakers
A.a closed loop control system
B.an open loop control system
C.a boiler control system
D.a steering gear control system
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