Question

Q.9. Arubberised flat belt is moving at 14 m/s with the tension in the tight side of 10.0 kN and the slack side of 5.0 kN. The belt is 350 mm wide and 10 mm thick, and it is constructed of 5 plies of 32 oz canvas ducking. What is tension ratio in the belt? A. 2.0 В. 2.1 С. 1.9 D. 2.3 E. none of above (4 Marks) Q.10. A V-belt drive system is to be designed to transmit a design power of 40kW with the faster shaft speed of 1500 rpm. Select a suitable V-belt cross section А. А В. В C. C D. SPC E. none of above (2 Marks) Q.11. A V-belt drive is to transmit a design power of 10KW with the driving pulley running at 1000 rpm and driven pulley at 500 rpm. 'B' section belts are used. Select suitable pulley sizes for this application A. d 50 mm, D 100 mm B. d 56 mm, D = 112 mm C. d 75 mm, D = 150 mm D. d 140 mm, D 280 mm E. none of above (2 Marks) Q.12. A 'B section belt drive is required to transmit a design power of 8.00kW with 125mm and 250mm pitch diameter pulleys at a centre distance of 250mm. The 125mm drive pulley runs at 720 rpm and a 930mm pitch length belt is used. How many belts are required to transmit the power? A. 3 belts B. 4 belts C. 5 belts D. 6 belts E. none of above (4 Marks) Q.13. What happens if the contact ratio of gears is less than 1? A. at least one pair of teeth is always in contact B. two pairs of teeth are occasionally in contact C. there are periods with no contact between teeth D. two pairs of teeth are always in contact E. none of above (2 Marks)

Answer 1

In this solution some basic concepts and formulas of Belt and Gear Mechanics are used. For more information, refer to any standard textbook or drop a comment below. Please give a Thumbs Up, if solution is helpful.

Solution :

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