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MCQs

Total Questions : 323 | Page 28 of 33 pages
Question 271. 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
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 272. In tramways which of the following motors is used ?
  1.    D.C. shunt motor
  2.    D.C. series motor
  3.    A.C. three phase motor
  4.    AC. single phase capacitor start motor
 Discuss Question
Answer: Option B. -> D.C. series motor
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 273. 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
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 274. The number of passenger coaches that can be attached to a diesel engine locomotive on broad gauge is usually restricted to_____________/
  1.    5
  2.    10
  3.    14
  4.    17
 Discuss Question
Answer: Option B. -> 10
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 275. 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
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 276. 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
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 277. 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
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 278. 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
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 279. Co-efficient 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.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 280. The air resistance to the movement of the train is proportional to_____________?
  1.    speed
  2.    (speed)
  3.    (speed).
  4.    1/speed
 Discuss Question
Answer: Option B. -> (speed)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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