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Question

During orthogonal machining on a work piece of diameter 100 mm, the length of the chip produced is 78.5 mm. The chip reduction coefficient is

A
2.5
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B
4
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C
0.25
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D
0.4
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Solution

The correct option is B 4
r=ttc=lcl=1K

K=llc=πDlc=π×10078.5=4.0

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