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MCQs

Total Questions : 323 | Page 33 of 33 pages
Question 321. Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?
  1.    Reduced current method
  2.    Tap changing control of transformer
  3.    Series parallel operation of motors
  4.    All of the above
 Discuss Question
Answer: Option B. -> Tap changing control of transformer
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 322. The braking retardation is usually in the range__________________?
  1.    0.15 to 0.30 km phps
  2.    0.30 to 0.6 km phps
  3.    0.6 to 2.4 km phps
  4.    3 to 5 km phps
  5.    10 to 15 km phps
 Discuss Question
Answer: Option D. -> 3 to 5 km phps
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 323. _______________watt-hours per tonne km is usually the specific energy consumption for suburban services?
  1.    15—20
  2.    50—75
  3.    120—150
  4.    160—200
 Discuss Question
Answer: Option B. -> 50—75
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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