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

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

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Machine Design
The flank of the tooth is the

Surface of the tooth above the pitch surface
Surface of the tooth below the pitch surface
Width of the tooth measured along the pitch circle
Surface of the top of the tooth

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Machine Design
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by

Equating shearing resistance to the crushing resistance of the rivets
Equating tearing resistance of the plate to the crushing resistance of the rivets
None of these
Equating tearing resistance of the plate to the shearing resistance of the rivets

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