Which of the following methods may be used to convert A.C. system to D.C ?
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 convertersE. 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 convertersE. 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. motorD. any of the above methods E. none of the above methods
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 lightsE. All of the above
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. generatorB. 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 VD. 1700—2000 V
Which of the following is reversible in action ? A. Motor generator set B. Motor converterC. Rotary converter D. Any of the above E. None 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 alternatorD. any D.C. machine
Which of the following metals is generally manufactured by electrolysis process ? A. LoadB. Aluminium C. Copper D. Zinc E. None of the above