It is desired to punch a hole of 20 mm diameter in a plate 20 mm think – McqOptions

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1.	It is desired to punch a hole of 20 mm diameter in a plate 20 mm think. If the shear stress of mild steel is 30 kg/mm2, the force necessary for punching would be approximately in the range
A.	20 - 25 tonnes
B.	15 - 20 tonnes
C.	10 - 15 tonnes
D.	35 - 40 tonnes
E.	25 - 35 tonnes
Answer» E.

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