Machine Design
Which of the following statement is correct for gears?

The addendum is less than dedendum
The pitch circle diameter is equal to the product of module and number of teeth
All of these
The pitch circle is always greater than the base circle

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Machine Design
An open belt drive is used when

Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft
Shafts are arranged at right angles and rotate in one definite direction
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged parallel and rotate in the opposite directions

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