How many minimum sides to be measured of a cylinder to test parallelism?
(a) 1
(b) 2
(c) 3
(d) 4
I got this question in quiz.
My question is taken from Parallelism, Equidistance and Coincidence in section Straightness, Flatness, Squareness, Parallelism, Circularity and Rotation of Engineering Metrology