Q.

What is the limitation of microscopic inspection to check surface finish?

A. an average value is needed
B. small portion of surface can be detected at a time
C. a master finish surface is also needed
D. it is necessary to inspect whole surface together
Answer» B. small portion of surface can be detected at a time
Explanation: microscopic inspection method have some limitation that at a time only a small portion of the surface can be inspected. so for inspection, several readings are required in this method to get an average value.
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