8. Which one of the following is a positive drive? (a) Crossed flat belt drive (c)...

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8. Which one of the following is a positive drive? (a) Crossed flat belt drive (c) V-belt drive (b) Rope drive Chain di 9. Factor of safety for fatigue loading is the ratio of Elastic limit to the working stress Young's modulus to the ultimate tensile strength Endurance limit to the working stress Elastic limit to the yield point 10. Failure of a material is called fatigue when it fails a) b) c) d) a) c) At the elastic limit At the yield point 11. Flat belt drives are used for a. Moderate amount of power to be transmitted b. Center distance is more than 8 meter c. Center distance is not a criteria d. None of the above b) Below the elastic limit d) Below the yield point 12. As compared to belt drive, the chain drive transmits a. More power b. Less power c. Same power d. None of the above 13. In case of V belt drive, a. The belt should touch the bottom of groove in the pulley b. The belt should not touch the sides of groove in the pulley c. The belt should not touch the bottom of groove in the pulley d. None of the above 14. Rotation of driver and driven shaft is in same direction in a. Open belt drive b. Crossed belt drive c. Both types of belt arrangement as stated in (a) & (b) above d. Power driven machines 15. The power transmitted by the belt drive can be increased by a. Increasing the initial tension in the belt b. Increasing the co efficient of friction c. Increasing the belt velocity d. All of the above methods [1 mark] [1 mark] Krish X3gripp [1 mark] [1 mark] [1 mark] [1 mark] [1 mark] [1 mark] 8. Which one of the following is a positive drive? (a) Crossed flat belt drive (c) V-belt drive (b) Rope drive Chain di 9. Factor of safety for fatigue loading is the ratio of Elastic limit to the working stress Young's modulus to the ultimate tensile strength Endurance limit to the working stress Elastic limit to the yield point 10. Failure of a material is called fatigue when it fails a) b) c) d) a) c) At the elastic limit At the yield point 11. Flat belt drives are used for a. Moderate amount of power to be transmitted b. Center distance is more than 8 meter c. Center distance is not a criteria d. None of the above b) Below the elastic limit d) Below the yield point 12. As compared to belt drive, the chain drive transmits a. More power b. Less power c. Same power d. None of the above 13. In case of V belt drive, a. The belt should touch the bottom of groove in the pulley b. The belt should not touch the sides of groove in the pulley c. The belt should not touch the bottom of groove in the pulley d. None of the above 14. Rotation of driver and driven shaft is in same direction in a. Open belt drive b. Crossed belt drive c. Both types of belt arrangement as stated in (a) & (b) above d. Power driven machines 15. The power transmitted by the belt drive can be increased by a. Increasing the initial tension in the belt b. Increasing the co efficient of friction c. Increasing the belt velocity d. All of the above methods [1 mark] [1 mark] Krish X3gripp [1 mark] [1 mark] [1 mark] [1 mark] [1 mark] [1 mark]

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Answer 8 c Vbelt drive 9 c Endurance limit to the working stress 10 d Below the yield point 11 a Moderate amount of power to be transmitted 12 a More power 13 a The belt should touch the bottom of gro... View the full answer