A. an induction motor and a D.C. generator
B. a synchronous motor and a D.C. generator
C. a D.C. series motor and a D.C. generator
D. none of the above
A. 200-100 V
B. 600—800 V
C. 1000—1200 V
D. 1700—2000 V
A. Motor generator set
B. Motor converter
C. Rotary converter
D. Any of the above
E. None of the above
A. one armature and one field
B. two armatures and one field
C. one armature and two fields
D. none of the above
A. a transformer
B. an induction motor
C. an alternator
D. any D.C. machine
A. Load
B. Aluminium
C. Copper
D. Zinc
E. None of the above
A. Motor-generator set
B. Motor converter
C. Rotary converter
D. Mercury arc rectifier
A. low power factor
B. high power factor
C. zero power factor
D. none of the above
A. d.c. only
B. a.c. only
C. partly a.c. and partly d.c.
A. Illumination
B. Electrolysis
C. Variable speed operation
D. Traction