Which of the following are the applications of D.C. system ?
A. Battery charging work
B. Arc welding
C. Electrolytic and electro-chemical processes
D. Arc lamps for search lights
E. All of the above
Which of the following methods may be used to convert A.C. system to D.C ?
A. Rectifiers
B. Motor converters
C. Motor-generator sets
D. Rotary converters
E. All of the above
A synchronous converter can be started______________?
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
In a single phase rotary converter the number of slip rings will be_____________?
A. two
B. three
C. four
D. six
E. none
A rotary converter combines the function of____________?
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
With a motor converter it is possible to obtain D.C. voltage only upto__________?
A. 200-100 V
B. 600—800 V
C. 1000—1200 V
D. 1700—2000 V