Which among the following terms is used for irregularities or imperfections that occur in isolating places in the surface without pattern ?

0.001 mm

The value of one micron is 0.001 mm

40 micro-inch

Waviness

This is the component of the surface texture upon which roughness is superimposed. Waviness may result from machine or work deflections, vibrations, chatter, heat treatment or warping strain.

Surface texture

When components are produced either by machining or by hand processes, the movement of the cutting tool leaves certain lines or patterns on the work surface. This is known as surface texture.