1.

A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is

A. .2 mm
B. 0 mm
C. 0 mm
D. 00 mm
Answer» D. 00 mm


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