What is flatness error?
(a) Maximum separation of a pair of parallel planes which will contain all points on the surface
(b) Minimum separation of a pair of parallel planes which will contain all points on the surface
(c) Minimum separation of a pair of perpendicular planes which will contain all points on the surface
(d) Maximum separation of a pair of perpendicular planes which will contain all points on the surface
The question was asked in unit test.
Asked question is from Flatness Testing in chapter Straightness, Flatness, Squareness, Parallelism, Circularity and Rotation of Engineering Metrology