Q.

It is difficult to machine inner radii smaller than                      and outer radii less than

A. 0.1 mm, 0.2 mm
B. 0.5 mm, 0.8 mm
C. 0.8 mm, 0.5 mm
D. 0.2 mm, 0.1 mm
Answer» C. 0.8 mm, 0.5 mm
Explanation: it is difficult to machine inner radii < 0.8mm and outer radii < 0.5mm.
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