Which of the following is CORRECT for the train value of a gear train?

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SSC JE ME Previous Paper 17 ( Held on: 24 Jan 2018 Morning)
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  1. Speed of driver/speed of driven
  2. Speed of driven/speed of driver
  3. Number of teeth on driven/number of teeth on driver
  4. None of these

Answer (Detailed Solution Below)

Option 2 : Speed of driven/speed of driver
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Detailed Solution

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Concept:

The speed ratio (or velocity ratio) of the gear train is the ratio of the speed of the driver to the speed of the driven or follower.

\(Speed\;ratio = \frac{{{\omega _{driver}}}}{{{\omega _{driven}}}} = \frac{{{\omega _1}}}{{{\omega _2}}} = \frac{{{N_1}}}{{{N_2}}} = \frac{{{T_2}}}{{{T_1}}} = \frac{1}{{Train\;Value}}\)

\(Train\;ratio = \frac{{{\omega _{drivev}}}}{{{\omega _{driver}}}} \)

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