31. In a belt drive, the condition where there is relative motion between the belt and the pulley surface in known as
- Creep
- Slip
- Slack
- Contact angle
32. In a flat belt drive, the centrifugal tension in the belt
- increases the power transmitted
- decreases the power transmitted
- has no effect on the power transmitted
- is equal to maximum tension on the belt
33. Using a jockey pulley (or idler pulley) in an open belt drive, does not necessarily lead to increase of which of the following?
- Arc of contact
- Tensions in the belts
- Belt speed
- Power transmission
34. Maximum power transmission in a belt is met when the total tension in the belt equals
- centrifugal tension
- 2π times centrifugal tension
- Thrice centrifugal tension
- Half the centrifugal tension
35. What does the centrifugal tension belts do?
- Increases power transmitted
- Decreases power transmitted
- Have no effect on power transmitted
- Increases power transmitted upto a certain
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.
- 12000 W
- 500 W
- 2200 W
- 2000 W
37. Which of the following belt is/are suitable for cross belt drive?
- V-belt
- Flat belt
- Running belt
- All of these
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
- 400 N
- 600 N
- 150 N
- 300 N
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
- (T2-T1)V
- (T1-T2)V
- (T1-T2)/V
- V/(T1-T2)
40. The sum of the tensions when the belt is running on the pulley is
- less than the initial tension
- more than the initial tension
- twice the initial tension
- half the initial tension