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MCQs

Total Questions : 377 | Page 33 of 38 pages
Question 321. In a D.C. generator in case the resistance of the field winding is increased, then output voltage will____________?
  1.    increase
  2.    decrease
  3.    remain unaffected
  4.    fluctuate heavily
 Discuss Question
Answer: Option B. -> decrease
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 322. Lap winding is composed of_____________?
  1.    any even number of conductors
  2.    any odd number of conductors
  3.    that even number which is exact multiple of poles + 2
  4.    that even number which is exact multiple of poles
 Discuss Question
Answer: Option A. -> any even number of conductors
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 323. Open circuited armature coil of a D.C. machine is________________?
  1.    identified by the scarring of the commutator segment to which open circuited coil is connected
  2.    indicated by a spark completely around the commutator
  3.    both A. and (b)
  4.    none of the above
 Discuss Question
Answer: Option C. -> both A. and (b)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 324. Satisfactory commutation of D.C. machines requires______________?
  1.    brushes should be of proper grade and size
  2.    brushes should smoothly run in the holders
  3.    smooth, concentric commutator properly undercut
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 325. For the parallel operation of two or more D.C. compound generators, we should ensure that_______________?
  1.    voltage of the incoming generator should be same as that of bus bar
  2.    polarity of incoming generator should be same as that of bus bar
  3.    all the series fields should be run in parallel by means of equilizer connection
  4.    series fields of all generators should be either on positive side or negative side of the armature
  5.    all conditions mentioned above should be satisfied
 Discuss Question
Answer: Option D. -> series fields of all generators should be either on positive side or negative side of the armature
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 326. D.C. series generator is used_________________?
  1.    to supply traction load
  2.    to supply industrial load at constant voltage
  3.    voltage at the toad end of the feeder
  4.    for none of the above purpose
 Discuss Question
Answer: Option C. -> voltage at the toad end of the feeder
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 327. An exciter for a turbo generator is a_____________?
  1.    separately excited generator
  2.    shunt generator
  3.    series generator
  4.    compound generator
 Discuss Question
Answer: Option B. -> shunt generator
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 328. D.C. generator generally preferred for charging automobile batteries is______________?
  1.    series generator
  2.    shunt generator
  3.    long shunt compound generator
  4.    any of’the above
 Discuss Question
Answer: Option C. -> long shunt compound generator
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 329. In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when____________?
  1.    r.p.m. is more than 300
  2.    r.p.m. is less than 300
  3.    number of poles is 4
  4.    number of poles is 2
 Discuss Question
Answer: Option D. -> number of poles is 2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 330. Following D.C. generator will be in a position to build up without any residual magnetism in the poles______________?
  1.    series generator
  2.    shunt generator
  3.    compound generator
  4.    self-excited generator
 Discuss Question
Answer: Option D. -> self-excited generator
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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