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MCQs

Total Questions : 323 | Page 3 of 33 pages
Question 21. For 25 kV single phase system power supply frequency is
  1.    60 Hz
  2.    50 Hz
  3.    25 Hz
  4.    16 Hz
 Discuss Question
Answer: Option B. -> 50 Hz
Question 22. For given maximum axle load tractive efforts of AC. locomotive will be
  1.    Less than that of D.C. locomotive
  2.    More than that of D.C. locomotive
  3.    Equal to that of D.C. locomotive
  4.    None of the above
 Discuss Question
Answer: Option B. -> More than that of D.C. locomotive
Question 23. The speed of a superfast train is
  1.    60 kmph
  2.    75 kmph
  3.    100 kmph
  4.    More than 100 kmph
 Discuss Question
Answer: Option D. -> More than 100 kmph
Question 24. The normal value of adhesion friction is
  1.    0.12
  2.    0.25
  3.    0.40
  4.    0.75
 Discuss Question
Answer: Option B. -> 0.25
Question 25. In main line service as compared to urban and suburban service
  1.    Distance between the stops is more
  2.    Maximum speed reached is high
  3.    Acceleration and retardation rates are low
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 26. Power for lighting in passenger coach, in a long distance electric train, is provided
  1.    Directly through overhead electric line
  2.    Through individual generator of bogie and batteries
  3.    Through rails
  4.    Through locomotive
 Discuss Question
Answer: Option B. -> Through individual generator of bogie and batteries
Question 27. The voltage used for suburban trains in D.C. system is usually
  1.    12 V
  2.    24 V
  3.    220 V
  4.    600 to 750 V
 Discuss Question
Answer: Option D. -> 600 to 750 V
Question 28. Vacuum is created by which of the following?
  1.    Vacuum pump
  2.    Ejector
  3.    Any of the above
  4.    None of the above
 Discuss Question
Answer: Option C. -> Any of the above
Question 29. Energy consumption in propelling the train is required for which of the following?
  1.    Work against the resistance to motion
  2.    Work against gravity while moving up the gradient
  3.    Acceleration
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 30. Coefficient of adhesion reduces due to the presence of which of the following?
  1.    Sand on rails
  2.    Dew on rails
  3.    Oil on the rails
  4.    Both (B) and (C)
 Discuss Question
Answer: Option D. -> Both (B) and (C)

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