+1 vote
in Machine Kinematics by (38.0k points)
In a gear having involute teeth, the normal to the involute is a tangent to the

(a) pitch circle

(b) base circle

(c) addendum circle

(d) dedendum circle

I got this question during an online interview.

Origin of the question is Comparison Between Involute and Cycloidal Gears topic in section Toothed Gearing & Gear Trains of Machine Kinematics

1 Answer

0 votes
by (92.2k points)
Correct answer is (b) base circle

Explanation: Addendum circle is the circle drawn through the top of the teeth and is concentric with the pitch circle.

Dedendum circle is the circle drawn through the bottom of the teeth. It is also called root circle.

Pitch circle is an imaginary circle which by pure rolling action, would give the same motion as the actual gear.

Related questions

We welcome you to Carrieradda QnA with open heart. Our small community of enthusiastic learners are very helpful and supportive. Here on this platform you can ask questions and receive answers from other members of the community. We also monitor posted questions and answers periodically to maintain the quality and integrity of the platform. Hope you will join our beautiful community