Belt Drive MCQ and Pulley MCQ

21. Tension in the tight side of a belt drive is 100 N & that in the slack side is 60 N. If the breadth is 10 cm & thickness 4 cm. What is the maximum stress induced in the belt?

1. 1.5 N/cm²
2. 2.5 N/cm²
3. 2 N/cm²
4. 4 N/cm²

22. What is the power transmitted by a belt running over a pulley of 500 mm diameter at 200 rpm, if the minimum and maximum tensions in the belt are 1200 N and 2400 N respectively?

1. 3.4 kW
2. 6.3 kW
3. 8.5 kW
4. 10.2 kW

23. In a V-belt drive, the belt makes contact at

1. bottom of pulley
2. sides of the groove of pulley
3. sides of groove and bottom of pulley
4. could make contact anywhere

24. In a cross belt drive, both pulleys (Shafts) are rotated in _________ direction.

1. same
2. zig-zag
3. opposite
4. perpendicular

25. The initial tension in the flat belt drive is given by

1. Tension of tight side
2. Tension of slack side
3. Average tension of tight and slack side
4. Product of tension of tight and slack side

26. An electric motor running at 900 rpm drives a pump at 1500 rpm. If the pulley on the driving shaft is 750 mm in diameter, what is the required size of pulley on the driven shaft?

1. 1250 mm
2. 450 mm
3. 900 mm
4. None of these

27. In a horizontal flat belt drive, it is customary to use

1. bottom side of the belt as the slack side during the transmission of power
2. top side of the belt as the slack side
3. crossed-belting
4. idler in between

28. Pouring of tallow or powdered resin at outer surface of the pulley and the belt is known as

1. crowning
2. creep
3. dressing
4. slip

29. Due to slip of the belt, which type of condition occurs in velocity ratio of the belt drive?

1. it decreases
2. it is first equal and then it increases
3. it first decreases and then it increases
4. no effect on the belt drive

30. Which is a positive drive?

1. Flat belt drive
2. Round belt drive
3. Crossed belt drive
4. Timing belt