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MCQs

Total Questions : 71 | Page 5 of 8 pages
Question 41. Which one of the following device is used for improving the power factor of the system:
  1.    Synchronous Phase Modifier
  2.    Shunt Reactor
  3.    Series Reactor
  4.    Asynchronous Generator
 Discuss Question
Answer: Option A. -> Synchronous Phase Modifier
Question 42. For the single phase 2-wire system, the maximum voltage between the outer wires and earth is ______________
  1.    V/√2
  2.    √2V
  3.    V
  4.    2V
 Discuss Question
Answer: Option A. -> V/√2
Question 43. When a line to ground fault occurs,the current in faulted phase is 100 A
  1.    0 A
  2.    33.3 A
  3.    66.6 A
  4.    100 A
 Discuss Question
Answer: Option B. -> 33.3 A
Question 44. Which among the following quantities are specified at the generator bus?
  1.    P and Q
  2.    P and |V|
  3.    Q and |V|
  4.    P and δ
 Discuss Question
Answer: Option B. -> P and |V|
Question 45. In a star connected system without neutral grounding, zero sequence currents are
  1.    Zero
  2.    Phaser sum of phase currents
  3.    Same as r.m.s. value of phase currents
  4.    Same as peak value of phase currents
 Discuss Question
Answer: Option A. -> Zero
Question 46. The amount of photo generated current increases slightly with increase in _________
  1.    Temperature
  2.    Photons
  3.    Diode current
  4.    Shunt current
 Discuss Question
Answer: Option A. -> Temperature
Question 47. A’ is an operator used to symmetrical component analysis
  1.    Which rotates the vector, it operates upon, through an angle 90° in the clockwise direction
  2.    Which rotates the vector, it operates upon, through an angle 120°, in the counter-clockwise direction
  3.    Which rotates the vector, it operates upon, through an angle 120°, in the clockwise direction
  4.    Which rotates the vector, it operates upon, through an angle 240°, in the clockwise direction
 Discuss Question
Answer: Option B. -> Which rotates the vector, it operates upon, through an angle 120°, in the counter-clockwise direction
Question 48. The load flow solution is always assured in case of:
  1.    Newton-Raphson method
  2.    Gauss method
  3.    Gauss-Seidel method
  4.    None of these methods guarantees
 Discuss Question
Answer: Option A. -> Newton-Raphson method
Question 49. For the given distribution system the maximum voltage at the midpoint will be ________
  1.    155.6 V
  2.    311.12 V
  3.    622 V
  4.    220 V
 Discuss Question
Answer: Option A. -> 155.6 V
Question 50. While designing the distribution to locality of one lac population with medium dense load requirement, we can employ ___________
  1.    radial system
  2.    parallel system
  3.    ring main system
  4.    any of the mentioned
 Discuss Question
Answer: Option A. -> radial system

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