Question

How bearing contact of mating gears is represented?

(a) By the relative size of the bearing contact pattern in mm

(b) By the relative size of the bearing contact pattern in cm

(c) By the relative size of the bearing contact pattern in meter

(d) By the relative size of the bearing contact pattern in percent

This question was addressed to me in exam.

Asked question is from Sources of Errors in Manufacturing Gears topic in division Measurement and Testing of Gears of Engineering Metrology

Answer 1

Correct answer is (d) By the relative size of the bearing contact pattern in percent

The best explanation: Bearing contact for mating gears is represented by the relative size of the bearing contact pattern in % and along the length of tool it is represented by the ratio of the traces of contact, subtracting gaps larger than the size of the module, to the full tooth length.