Question

The radial distance of a tooth from the pitch circle to the bottom of the tooth is called

(a) dedendum

(b) addendum

(c) clearance

(d) working depth

The question was posed to me in an interview.

The origin of the question is Law of Gearing-1 topic in chapter Toothed Gearing & Gear Trains of Machine Kinematics

Answer 1

Right answer is (a) dedendum

Easiest explanation: Dedendum is the radial distance of a tooth from the pitch circle to the bottom of the tooth.

Addendum is the radial distance of a tooth from the pitch circle to the top of the tooth.