A pair of parallel helical gears consist of 15 teeth pinion meshing with a 40 teeth gear. The helix angle is 22⁰ and normal pressure angle 19⁰. The normal module is taken as 4mm. Calculate the transverse pressure angle in degrees.
(a) 17.9
(b) 20.4
(c) 19.6
(d) 18.4
The question was posed to me at a technical round.
This MCQ is from the Helical Gears topic in part Rolling Contact Bearings, Spur Gears and Helical Gears of Machine Design