Rectifiers & Converters(Electrical Engineering Questions ) Questions and Answers

Question 1. Which of the following methods may be used to convert A.C. system to D.C ?
  1.    Rectifiers
  2.    Motor converters
  3.    Motor-generator sets
  4.    Rotary converters
  5.    All of the above
Explanation:-
Answer: Option E. -> All of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. A synchronous converter can be started______________?
  1.    by means of a small auxiliary motor
  2.    from AC. side as induction motor
  3.    from D.C. side as D.C. motor
  4.    any of the above methods
  5.    none of the above methods
Explanation:-
Answer: Option D. -> any of the above methods
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. Which of the following are the applications of D.C. system ?
  1.    Battery charging work
  2.    Arc welding
  3.    Electrolytic and electro-chemical processes
  4.    Arc lamps for search lights
  5.    All of the above
Explanation:-
Answer: Option E. -> All of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. With a motor converter it is possible to obtain D.C. voltage only upto__________?
  1.    200-100 V
  2.    600—800 V
  3.    1000—1200 V
  4.    1700—2000 V
Explanation:-
Answer: Option D. -> 1700—2000 V
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. A rotary converter is a single machine with______________?
  1.    one armature and one field
  2.    two armatures and one field
  3.    one armature and two fields
  4.    none of the above
Explanation:-
Answer: Option A. -> one armature and one field
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. A rotary converter in general construction and design, is more or less like___________?
  1.    a transformer
  2.    an induction motor
  3.    an alternator
  4.    any D.C. machine
Explanation:-
Answer: Option D. -> any D.C. machine
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. In a single phase rotary converter the number of slip rings will be_____________?
  1.    two
  2.    three
  3.    four
  4.    six
  5.    none
Explanation:-
Answer: Option A. -> two
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. Which of the following is reversible in action ?
  1.    Motor generator set
  2.    Motor converter
  3.    Rotary converter
  4.    Any of the above
  5.    None of the above
Explanation:-
Answer: Option C. -> Rotary converter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. A rotary converter combines the function of____________?
  1.    an induction motor and a D.C. generator
  2.    a synchronous motor and a D.C. generator
  3.    a D.C. series motor and a D.C. generator
  4.    none of the above
Explanation:-
Answer: Option B. -> a synchronous motor and a D.C. generator
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. Which of the following metals is generally manufactured by electrolysis process ?
  1.    Load
  2.    Aluminium
  3.    Copper
  4.    Zinc
  5.    None of the above
Explanation:-
Answer: Option B. -> Aluminium
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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