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


26. Which of the following does not change with the conditions of the mating gears.......


   A.pitch circle diameter

   B.base circle

   C.pressure angle

   D.all of the above

   E.none of the above


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B.base circle

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27. The circle passing through the bottom of the teeth of gear is known as.......


   A.inner circle

   B.prime circle

   C.base circle

   D.addendum circle

   E.dedendum circle


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E.dedendum circle

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28. Law of gearing is satisfied if.......


   A.two surfaces slide smoothly

   B.common normal at the point of contact passes through pitch point on the line joining the centres of rotation

   C.number of teeth=PCD/module

   D.addendurn is greater than dedendum

   E.none of the above


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B.common normal at the point of contact passes through pitch point on the line joining the centres of rotation

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29. The path of contact in involute gears is.......


   A.a straight line

   B.involute path

   C.curved line

   D.circle

   E.cycloidal


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A.a straight line

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30. According to the law of gearing.......


   A.teeth should be of involute type

   B.clearence between mating teeth should be provided

   C.dedendum should be equal to 1.157 m

   D.teeth should be of cycloidal type

   E.none of the above


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E.none of the above

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