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