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MCQs

Total Questions : 323 | Page 7 of 33 pages
Question 61. Locomotive having mono-motor bogies
  1.    Has better coefficient of adhesion
  2.    Are suited both for passenger as well as freight service
  3.    Has better riding qualities due to the reduction of lateral forces
  4.    Has all above qualities
 Discuss Question
Answer: Option D. -> Has all above qualities
Question 62. For diesel locomotives the range of horsepower is
  1.    50 to 200
  2.    500 to 1000
  3.    1500 to 2500
  4.    3000 to 5000
 Discuss Question
Answer: Option C. -> 1500 to 2500
Question 63. 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
Question 64. The efficiency of diesel locomotives is nearly
  1.    20 to 25 percent
  2.    30 to 40 percent
  3.    45 to 55 percent
  4.    60 to 70 percent
 Discuss Question
Answer: Option A. -> 20 to 25 percent
Question 65. For three-phase induction motors which of the following is the least efficient method of speed control?
  1.    Cascade control
  2.    Pole changing
  3.    Rheostat control
  4.    Combination of cascade and pole changing
 Discuss Question
Answer: Option C. -> Rheostat control
Question 66. Which of the following is the advantage of electric braking?
  1.    It avoids wear of track
  2.    Motor continues to remain loaded during braking
  3.    It is instantaneous
  4.    More heat is generated during braking
 Discuss Question
Answer: Option A. -> It avoids wear of track
Question 67. Speed-time curve of main line service differs from those of urban and suburban services on following account
  1.    It has longer free running period
  2.    It has longer coasting period
  3.    Accelerating and braking periods are comparatively smaller
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 68. Locomotives with monometer bogies have
  1.    Uneven distribution of tractive effect
  2.    Suitability for passenger as well as freight service
  3.    Lot of skidding
  4.    Low coefficient of adhesion
 Discuss Question
Answer: Option B. -> Suitability for passenger as well as freight service
Question 69. In case of locomotives the tractive power is provided by
  1.    Single cylinder double acting steam engine
  2.    Double cylinder, single acting steam engine
  3.    Double cylinder, double acting steam engine
  4.    Single stage steam turbine
 Discuss Question
Answer: Option C. -> Double cylinder, double acting steam engine
Question 70. The steam engine provided on steam locomotives is
  1.    Single acting condensing type
  2.    Single acting non-condensing type
  3.    Double acting condensing type
  4.    Double acting non-condensing type
 Discuss Question
Answer: Option B. -> Single acting non-condensing type

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