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MCQs

Total Questions : 323 | Page 5 of 33 pages
Question 41. Which of the following is the voltage for single phase A.C. system?
  1.    22 V
  2.    440 V
  3.    5 kV
  4.    15 kV
 Discuss Question
Answer: Option A. -> 22 V
Question 42. _________ frequency is not common in low frequency traction system
  1.    40 Hz
  2.    25 Hz
  3.    16 Hz
  4.    None of these
 Discuss Question
Answer: Option A. -> 40 Hz
Question 43. Which of the following happens in Kando system?
  1.    Three phase A.C. is converted into D.C.
  2.    Single phase A.C. is converted into D.C.
  3.    Single phase supply is converted into three phase system
  4.    None of the above
 Discuss Question
Answer: Option C. -> Single phase supply is converted into three phase system
Question 44. The coasting retardation is around
  1.    0.16 km phps
  2.    1.6 km phps
  3.    16 km phps
  4.    40 km phps
 Discuss Question
Answer: Option A. -> 0.16 km phps
Question 45. Due to which of the following coefficient of adhesion improves?
  1.    Rust on the rails
  2.    Dust on the rails
  3.    Sand on the rails
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 46. Tractive effort is required to
  1.    Overcome the gravity component of train mass
  2.    Overcome friction, windage and curve resistance
  3.    Accelerate the train mass
  4.    Do all of the above
 Discuss Question
Answer: Option D. -> Do all of the above
Question 47. Automatic signaling is used for which of the following trains?
  1.    Mail and express trains
  2.    Superfast trains
  3.    Suburban and Urban electric trains
  4.    All trains
 Discuss Question
Answer: Option B. -> Superfast trains
Question 48. In case of steam engines the steam pressure is
  1.    1 to 4 kgf/cm²
  2.    5 to 8 kgf/cm²
  3.    10 to 15 kgf/cm²
  4.    25 to 35 kgf/cm²
 Discuss Question
Answer: Option C. -> 10 to 15 kgf/cm²
Question 49. The resistance encountered by a train in motion is on account of
  1.    Resistance offered by air
  2.    Friction at the track
  3.    Friction at various parts of the rolling stock
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 50. In case of a steam engine an average coal consumption per km is nearly
  1.    150 to 175 kg
  2.    100 to 120 kg
  3.    60 to 80 kg
  4.    28 to 30 kg
 Discuss Question
Answer: Option D. -> 28 to 30 kg

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