The standard value of addendum is

Question

Question

This question was previously asked in

BPSC AE Paper 6 (Mechanical) 2012 Official Paper

Answer 1

Explanation:

The addendum is the height by which a tooth of a gear projects beyond (outside for external, or inside for internal) the standard pitch circle or pitch line.
Also, the radial distance between the pitch diameter and the outside diameter
In the gear drive, Standard Addendum = 1 module

Additional Information

Addendum: It is the radial distance between pitch circle and the addendum circle.
Dedendum: It is the radial distance between the pitch circle and the root circle.
Working depth: This is the distance of engagement of two mating teeth and is equal to the sum of the addendums of the mating teeth of two gears.
Whole depth: This is the height of a tooth and is equal to the addendum plus dedendum.
Face width: This is the width of the gear and it is the distance from one end of a tooth to the other end.
Face of a tooth: This is the surface of the tooth between the pitch circle and the outside circle.
Flank of tooth: This is the surface of the tooth between the pitch circle and root circle.
Clearance: This is the radial distance between the top land of a tooth and the bottom land of the mating tooth.