Question

A cam profile is drawn which gives a uniform rise and fall of 40 mm to a point during each revolution of cam. The follower will rise to a distance of 20 mm if the shaft is rotated to an angle of _____

(a) 180 degrees

(b) 90 degrees

(c) 120 degrees

(d) 150 degrees

This question was addressed to me in an internship interview.

This interesting question is from Cam in division Curves used in Engineering Practice of Engineering Drawing

Answer 1

Correct answer is (b) 90 degrees

The explanation is: Given a cam profile is made throughout without any dwell and also with continuous rise- fall period. So 180 = maximum rise. And since the given profile is uniform it follows the linear function. 40 is for 180 and 20 is for 90 degrees.