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Question

A 10 mm diameter annealed steel wire is drawn through a die at a speed of 0.5 m/s to reduce the diameter by 20%. the yield stress of the material is 800 MPa

The power required for the drawing process (in kW) is

A
8.97
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B
14.0
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C
17.95
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D
28.0
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Solution

The correct option is A 8.97
Power required,

P=Fd×v

=357×π4×(df)2×v

=357×π4×(8)2×0.5

= 8.972 kW

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