Question

Which of the following statement is wrong about sampling length?

(a) It is the length of profile necessary for evaluation of irregularities to be taken account

(b) It is known as cut off length in regard to measuring instruments

(c) It is measured in a direction parallel to general direction of profile

(d) It is the length of profile necessary for evaluation of surface roughness parameters

The question was asked during an interview.

My question is taken from Terminology as per Indian Standards in portion Measurement of Surface Finish of Engineering Metrology

Answer 1

The correct option is (d) It is the length of profile necessary for evaluation of surface roughness parameters

The best explanation: Sampling length is the profile length which is necessary for the evaluation of the irregularities. This is also called as the ‘cut-off length’ in regard to the measuring instruments. It is measured in parallel direction to the direction of the profile.