A. two
B. three
C. four
D. six
E. none
Related Mcqs:
- A rotary converter is a single machine with______________?
A. one armature and one field
B. two armatures and one field
C. one armature and two fields
D. none of the above - A rotary converter in general construction and design, is more or less like___________?
A. a transformer
B. an induction motor
C. an alternator
D. any D.C. machine - In a rotary converter I2R losses as compared to a D.C. generator of the same size will be___________?
A. same
B. less
C. double
D. three times - In a rotary converter armature currents are______________?
A. d.c. only
B. a.c. only
C. partly a.c. and partly d.c. - A rotary converter operates at a______________?
A. low power factor
B. high power factor
C. zero power factor
D. none of the above - 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 - In a phase-shift control method, the phase shift between anode and grid voltages can be achieved by means of______________?
A. shunt motor
B. synchronous motor
C. induction regulator
D. synchronous generator - 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 - 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 phase-shift control method the control is carried out by varying the of grid voltage
A. magnitude
B. polarity
C. phase
D. any of the above
E. none of the above
