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Total Questions : 377 | Page 1 of 38 pages
Question 1. In a D.C. generator
  1.    External resistance = internal characteristic armature reaction
  2.    Internal characteristic = magnetization characteristic ohmic drop
  3.    External characteristic = magnetization characteristic ohmic drop armature reaction
  4.    Magnetization characteristic = external characteristic
 Discuss Question
Answer: Option C. -> External characteristic = magnetization characteristic ohmic drop armature reaction
Question 2. The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be
  1.    150 V
  2.    Less than 150 V
  3.    Greater than 150 V
  4.    None of the above
 Discuss Question
Answer: Option C. -> Greater than 150 V
Question 3. The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be
  1.    640 V
  2.    620 V
  3.    600 V
  4.    580 V
 Discuss Question
Answer: Option D. -> 580 V
Question 4. Shunt generators are most suited for stable parallel operation because of their
  1.    rising voltage characteristics
  2.    identical voltage characteristics
  3.    drooping voltage characteristics
  4.    linear voltage characteristics
 Discuss Question
Answer: Option C. -> drooping voltage characteristics
Question 5. Permeance is the reciprocal of
  1.    Flux density
  2.    Reluctance
  3.    Ampere turns
  4.    Resistance
 Discuss Question
Answer: Option B. -> Reluctance
Question 6. The critical resistance of the D.C. generator is the resistance of
  1.    Field
  2.    Brushes
  3.    Armature
  4.    Load
 Discuss Question
Answer: Option A. -> Field
Question 7. In D.C. generators, the brushes on commutator remain in contact with conductors which
  1.    Lie under South Pole
  2.    Lie under North Pole
  3.    Lie under interpolar region
  4.    Are farthest from the poles
 Discuss Question
Answer: Option C. -> Lie under interpolar region
Question 8. In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when
  1.    There is no load on the generator
  2.    The generator runs on full load
  3.    The generator runs on overload
  4.    The generator runs on designed speed
 Discuss Question
Answer: Option A. -> There is no load on the generator
Question 9. A separately excited generator as compared to a self-excited generator
  1.    Is amenable to better voltage control
  2.    Is more stable
  3.    Has exciting current independent of load current
  4.    Has all above features
 Discuss Question
Answer: Option D. -> Has all above features
Question 10. With a D.C. generator which of the following regulation is preferred?
  1.    100% regulation
  2.    Infinite regulation
  3.    50% regulation
  4.    1% regulation
 Discuss Question
Answer: Option D. -> 1% regulation

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