An imaginary circle which by pure rolling action, gives the same motion as the actual gear, is called
A
addendum circle
B
dedendum circle
C
pitch circle
D
clearance circle
Correct Answer: pitch circle
Pitch circle is an imaginary circle which by pure rolling action, would give the same motion as the actual gear. 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.