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

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

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Machine Design
Set screws are

Similar to stud
Used to prevent relative motion between parts
Similar to small size tap bolts except that a greater variety of shapes of heads are available
Slotted for a screw driver and generally used with a nut

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Machine Design
Coaxing is the procedure of increasing

Metal resistance to corrosion by coating
Metal hardness by surface treatment
Metal strength by cycling
Fatigue limit by over-stressing the metal by successively increasing loadings

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