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MCQs

Total Questions : 323 | Page 4 of 33 pages
Question 31. Long distance railways use which of the following?
  1.    200 V D.C.
  2.    25 kV single phase A.C.
  3.    25 kV two phase A.C.
  4.    25 kV three phase A.C.
 Discuss Question
Answer: Option B. -> 25 kV single phase A.C.
Question 32. The specific energy consumption of a train depends on which of the following?
  1.    Acceleration and retardation
  2.    Gradient
  3.    Distance covered
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 33. Coefficient of adhesion is
  1.    High in case of D.C. traction than in the case of AC. traction
  2.    Low in case of D.C. traction than in the case of AC. traction
  3.    Equal in both AC. and D.C. traction
  4.    Any of the above
 Discuss Question
Answer: Option B. -> Low in case of D.C. traction than in the case of AC. traction
Question 34. The pulsating torque exerted by steam locomotives causes which of the following?
  1.    Jolting and skidding
  2.    Hammer blow
  3.    Pitching
  4.    All of the above
 Discuss Question
Answer: Option A. -> Jolting and skidding
Question 35. Which of the following braking systems on the locomotives is costly?
  1.    Regenerative braking on electric locomotives
  2.    Vacuum braking on diesel locomotives
  3.    Vacuum braking on steam locomotives
  4.    All braking systems are equally costly
 Discuss Question
Answer: Option A. -> Regenerative braking on electric locomotives
Question 36. Battery operated trucks are used in
  1.    Steel mills
  2.    Power stations
  3.    Narrow gauge traction
  4.    Factories for material transportation
 Discuss Question
Answer: Option D. -> Factories for material transportation
Question 37. Main traction systems used in India are, those using
  1.    Electric locomotives
  2.    Diesel engine locomotives
  3.    Steam engine locomotives
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 38. Series motor is not suited for traction duty due to which of the following account?
  1.    Less current drain on the heavy load torque
  2.    Current surges after temporary switching off supply
  3.    Self relieving property
  4.    Commutating property at heavy load
 Discuss Question
Answer: Option B. -> Current surges after temporary switching off supply
Question 39. Specific energy consumption is affected by which of the following factors?
  1.    Retardation and acceleration values
  2.    Gradient
  3.    Distance between stops
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 40. Automatic signalling 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

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