Theory of Machine | Theory of Machine Objective Type Questions and answers


36. Intermediate gears are used for.......


   A.obtaining rotation in desired direction

   B.reducing the size of the individual gear

   C.bridging the gap between the first and last wheels of the train

   D.driving auxiliaries incidental to the main drive

   E.any of the above


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E.any of the above

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37. Bevel gears have their teeth.......


   A.straight over the wheel rim

   B.inclined to wheel rim

   C.curved over the wheel rim

   D.cut on the surfaces of the cones

   E.none of the above


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D.cut on the surfaces of the cones

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38. Helical gears have their teeth.......


   A.straight over the wheel rim

   B.inclined to wheel rim

   C.curved over the wheel rim

   D.cut on the surfaces of the frusta of cones

   E.none of the above


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B.inclined to wheel rim

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39. Mittre gears are used for.......


   A.great speed reduction

   B.transmitting motion between two intersecting shafts

   C.equal speed

   D.minimum axial thrust

   E.none of the above


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C.equal speed

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40. The contact ratio or engagement factor in case of gears should be.......


   A.less than 1

   B.1

   C.1.3 to 1.5

   D.1.8 to 2.0

   E.2.0 to 2.5


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C.1.3 to 1.5

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