Question

Which term is used for errors of first and second order?

(a) Micro geometrical error

(b) Macro geometrical error

(c) Mini geometrical error

(d) Mili geometrical error

This question was addressed to me by my school teacher while I was bunking the class.

This is a very interesting question from Meaning of Surface Texture topic in portion Measurement of Surface Finish of Engineering Metrology

Answer 1

The correct choice is (b) Macro geometrical error

To elaborate: The error or irregularity falls under first and second order are also termed as macro-geometrical errors and the irregularities or error of third and fourth order are termed as micro-geometrical errors.