Belt Drive MCQ and Pulley MCQ

41. If the angle of contact is 3.06 rad and the coefficient of friction between the smaller pulley surface and belt is 0.5. Calculate the tension (in N) in the slack side, if the tension in the tight side is 1200 N.

  1. 200
  2. 257
  3. 387
  4. 452
Answer
Answer. b

42. The power transmitted by means of belt depends upon

  1. velocity of the belt
  2. tension on the belt
  3. arc of contact between the belt and the smaller pulley
  4. all of the above
Answer
Answer. d

43. Which of the following factors plays a considerable role in choice of belt drives?

  1. Angular position of connecting shaft
  2. Direction of belt motion
  3. Centre distance
  4. All options are correct
Answer
Answer. d

44. For a flat open-belt drive, the belt speed is 880 m/min and the power transmitted is 22.5 kW. What is the difference between the tight side and slack side tensions of the belt drive?

  1. 6450 N
  2. 9000 N
  3. 1000 N
  4. 1540 N
Answer
Answer. d

45. The ratio of the tension in the tight side (T1) and tension on the slack side of the belt (T2) of the belt is 5.0. What is the power transmitted (kW) by a belt, if the tension on the tight side of the belt is 5000 N and the velocity of belt is 25.00 m/sec?

  1. 50
  2. 75
  3. 100
  4. 150
Answer
Answer. c

46. Fan belt in automobiles is

  1. a five layer flat belt
  2. B-Section V belt
  3. E-Section V belt
  4. a three layer flat belt
Answer
Answer. b

47. The correct option for the occurrence of the total slip in a belt drive occurs when

  1. angle of creep is zero
  2. angle of rest is zero
  3. angle of creep is greater than angle of rest
  4. angle of rest is greater than angle of creep
Answer
Answer. b

48. Creep in belt drive is due to

  1. weak material of the belt
  2. weak material of the pulley
  3. uneven extensions and contractions of the belt when it passes from tight to slack side
  4. expansion of the belt
Answer
Answer. c

49. The tension of the tight side and the slack side of belt is (T1) and (T2) respectively, with the linear velocity (V). Which expression is most suited for the maximum power transmitted by the belt?

  1. (T2-T1)V
  2. (T1-T2)V
  3. (T1-T2)/V
  4. V/(T1-T2)
Answer
Answer. b

50. An idler pulley is used

  1. for frequent stoppage of motion
  2. to maintain requisite tension in the belt
  3. to change the torque of the belt
  4. to run only during non-load periods
Answer
Answer. b
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