Question

What do you mean by Geometrical Surface?

(a) Surface prescribed by design without any errors of form or surface roughness

(b) Surface limiting the body and separating it from surrounding

(c) Close representation of real surface

(d) Outer surface of the body

I have been asked this question by my school teacher while I was bunking the class.

Enquiry is from Terminology as per Indian Standards topic in division Measurement of Surface Finish of Engineering Metrology

Answer 1

Correct option is (a) Surface prescribed by design without any errors of form or surface roughness

The best I can explain: Geometrical surface is the surface prescribed by design or by process of a manufacturer, neglecting errors of form or surface roughness. Real surface is the surface limiting the body and separating it from surrounding surface.