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Machine Design 2: Design and selection of Belts, Design of Flywheel
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Machine Design 2: Design and selection of Belts, Design of Flywheel
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25 Questions

1. Crowns are never mounted on the pulley.
2. V belts result in smooth and quite operation even at high speeds.
3. Creep is the slight absolute motion of the belt as it passes over the pulley.
4. The flywheel is accelerated during the
5. Is there any worry for overloading conditions in flexible belt drives?
6. The law of belting states that the centreline of the belt when it approaches a pulley must not lie in the midplane of the pulley.
7. A shorter centre distance is always preferred in belt drives.
8. The optimum velocity of the belt for maximum transmission is given by √P/6m.
9. Velocity ratio for chain drive is lesser than that for belts.
10. Belt, chain and rope are called rigid drives.
11. The efficiency of flat belt drive is 35%. If all the parameters are same and flat belt is replaced by V belt, than the efficiency of V belt will be?
12. Velocity ratio in both flexible and rigid drive is constant.
13. Calculate the angle of wrap if diameter of the two pulleys are 550mm and 300mm. Also the centre distance is 2800mm.
14. The operation of flywheel is continuous.
15. It is possible to use the belting reverse direction without violating the law of belting.
16. Is use of a flywheel recommended when a large motor is required only for a small instant of time?
17. In horizontal belt, the loose side is generally kept on the bottom.
18. The belt tension is maximum when velocity of belt is 0.
19. If tensions in the belt are P₁ and P₂, then find P₁-mv²/P₂-mv². Contact angle for smaller pulley is 156⁰, Groove angle is 36⁰ and coefficient of friction is 0.2.
20. In a cast iron pulley minor axis is generally kept in the plane of rotation.
21. If maximum tension in the belt is 900N and allowable belt load is 500N. Calculate the number of belts required to transmit power.
22. Calculate the belt length if diameter of the two pulleys are 550mm and 300mm. Also the centre distance is 2800mm.
23. V belts have v shaped cross section.
24. Which of the following are functions of flywheel?
25. Flexible drive can absorb shock loads and damp vibrations.

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