DC Generators MCQs

Tech Books Yard have 43 DC Generators for Free Download

With dc generator, which of the following regulation is preferred?

  • A. 1% regulation
  • B. 50% regulation
  • C. infinite regulation
  • D. 100% regulation
  • Correct Answer: Option A

Which of the following helps in reducing the effect of armature reaction in dc generator?

  • A. compensating windings
  • B. interpoles
  • C. both A and B
  • D. neither A nor B
  • Correct Answer: Option C

The armature of a dc generator is laminated to

  • A. reduce the bulk
  • B. insulate the core
  • C. reduce eddy current loss
  • D. provide passage for cooling air
  • Correct Answer: Option C

In a shunt generator, the voltage built up is generally restricted by

  • A. speed limitation
  • B. armature heating
  • C. saturation of iron
  • D. brush wear
  • Correct Answer: Option C

In dc generator, the cause of rapid brush wear may be

  • A. imperfect contact
  • B. sever sparking
  • C. rough commutator surface
  • D. any of these
  • Correct Answer: Option D

Which loss in dc generator varies with load?

  • A. copper loss
  • B. eddy current loss
  • C. hysteresis loss
  • D. windage loss
  • Correct Answer: Option A

Full load efficiency of the generator will be

  • A. 68.5%
  • B. 73.5%
  • C. 80.8%
  • D. 92.51%
  • Correct Answer: Option D

Which of the following generators are preferred for parallel operations?

  • A. series generator
  • B. shunt generator
  • C. compound generator
  • D. all of these
  • Correct Answer: Option B

In dc generator the ripples in the direct emf generated are reduced by

  • A. using equalizer rings
  • B. using commutator with large number of segments
  • C. using carbon brushes of superior quality
  • D. using carbon brushes of excellent quality
  • Correct Answer: Option B

Which of the following component of dc generator plays vital role for providing direct current of a dc generator?

  • A. dummy coils
  • B. equalizer rings
  • C. eye bolt
  • D. commutator
  • Correct Answer: Option D