Question

Which of the following is not the correct property of involute curve?

(a) The form or shape pf an involute curve depends upon the diameter of base circle from which it is derived

(b) The angular motion of two involute gear teeth rotating at a uniform rate will be uniform, irrespective of the centre distance

(c) The relative rate of motion between driving and driven gears having involute tooth curves, is established by the diameters of their pitch circles

(d) the pitch diameters of mating involute gears are directly proportional to the diameters of their respective base circles

I had been asked this question in an interview for job.

My question is based upon Standard Proportions of Gear Systems in section Toothed Gearing & Gear Trains of Machine Kinematics

Answer 1

Right choice is (c) The relative rate of motion between driving and driven gears having involute tooth curves, is established by the diameters of their pitch circles

Explanation: All statements except at (c) are correct. The correct statement for (c) is – The relative rate motion between driving and driven gears having involute tooth curves, is established by the diameters of their base circles.