Belt Drive MCQ and Pulley MCQ

31. In a belt drive, the condition where there is relative motion between the belt and the pulley surface in known as

  1. Creep
  2. Slip
  3. Slack
  4. Contact angle
Answer
Answer. b

32. In a flat belt drive, the centrifugal tension in the belt

  1. increases the power transmitted
  2. decreases the power transmitted
  3. has no effect on the power transmitted
  4. is equal to maximum tension on the belt
Answer
Answer. c

33. Using a jockey pulley (or idler pulley) in an open belt drive, does not necessarily lead to increase of which of the following?

  1. Arc of contact
  2. Tensions in the belts
  3. Belt speed
  4. Power transmission
Answer
Answer. b

34. Maximum power transmission in a belt is met when the total tension in the belt equals

  1. centrifugal tension
  2. 2π times centrifugal tension
  3. Thrice centrifugal tension
  4. Half the centrifugal tension
Answer
Answer. c

35. What does the centrifugal tension belts do?

  1. Increases power transmitted
  2. Decreases power transmitted
  3. Have no effect on power transmitted
  4. Increases power transmitted upto a certain
Answer
Answer. c

36. Determine the power transmitted in a belt drive if the tensions in the tight and slack side are 1200 N and 1000 N, respectively. The velocity of the belt is 10 m/s.

  1. 12000 W
  2. 500 W
  3. 2200 W
  4. 2000 W
Answer
Answer. d

37. Which of the following belt is/are suitable for cross belt drive?

  1. V-belt
  2. Flat belt
  3. Running belt
  4. All of these
Answer
Answer. b

38. Mass per unit length of the belt of an open belt drive is 1.5 kg/m. If the linear velocity of the belt is 10 m/s and radius of driving pulley 0.5 m, centrifugal tension in the belt is

  1. 400 N
  2. 600 N
  3. 150 N
  4. 300 N
Answer
Answer. c

39. In a belt drive system, if T1 is the tension on the tight side, T2 is the tension on the slack side and V is the velocity of the belt, the power transmitted is

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

40. The sum of the tensions when the belt is running on the pulley is

  1. less than the initial tension
  2. more than the initial tension
  3. twice the initial tension
  4. half the initial tension
Answer
Answer. c