Which one of the following processes necessarily requires mandrel of requisite diameter to form the internal hole?

Which one of the following processes necessarily requires mandrel of r

1.	Which one of the following processes necessarily requires mandrel of requisite diameter to form the internal hole?
A.	Hydrostatic extrusion
B.	Tube drawing
C.	Swaging
D.	Wire drawing
Answer» B. Tube drawing

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Which one of the following processes necessarily requires mandrel of requisite diameter to form the internal hole?

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