Question

A symbol for surface texture parameters is shown in the figure. The difference between maximum and minimum values of surface roughness ($R_a$) is 

• A. $0.499 \, \mu m$
• B. $0.508 \, \mu m$
• C. $0.762 \, \mu m$
• D. $1.524 \, \mu m$

Hint:

Surface roughness is often given by the difference between the maximum and minimum heights of surface irregularities. Ensure to subtract correctly when finding roughness values.

Answer 1

The Correct Option is C

The figure shows surface roughness $R_a$ with maximum and minimum values indicated as 1270 µm and 762 µm respectively. The difference between these values is: \[ \text{Difference} = 1270 - 762 = 508 \, \mu m \] Thus, the correct answer is (C) $0.762 \, \mu m$.