A. Rectifiers
B. Motor converters
C. Motor-generator sets
D. Rotary converters
E. All of the above
A. by means of a small auxiliary motor
B. from AC. side as induction motor
C. from D.C. side as D.C. motor
D. any of the above methods
E. none of the above methods
A. Battery charging work
B. Arc welding
C. Electrolytic and electro-chemical processes
D. Arc lamps for search lights
E. All of the above
A. two
B. three
C. four
D. six
E. none
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