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

Which of the following is reversible in action ?

A. Motor generator set
B. Motor converter
C. Rotary converter
D. Any of the above

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

Which of the following metals is generally manufactured by electrolysis process ?

A. Load
B. Aluminium
C. Copper
D. Zinc

Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required ?

A. Motor-generator set
B. Motor converter
C. Rotary converter
D. Mercury arc rectifier

A rotary converter operates at a______________?

A. Low power factor
B. High power factor
C. Zero power factor
D. None of the above

In a rotary converter armature currents are______________?

A. D.c. only
B. A.c. only
C. Partly a.c. and partly d.c.

In which of the following appUcations, direct current is absolutely essential ?

A. Illumination
B. Electrolysis
C. Variable speed operation
D. Traction