Q249
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.
0.2 mm
B.
10 mm
C.
20 mm
AnswerD.
100 mm
Answer: Option C
Solution
Answer: Option C
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