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In extrusion process, extra shearing occurs in which part of the system?

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in Casting-Forming-Welding II by (119k points)
In extrusion process, extra shearing occurs in which part of the system?

(a) Feed section

(b) Pumping section

(c) Collapse section

(d) Transition section

The question was posed to me in a national level competition.

My enquiry is from Extrusion in Polymers topic in division Moulding with Polymers of Casting-Forming-Welding II

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Best answer
Right answer is (b) Pumping section

Explanation: The section where an additional amount of melting and shearing occurs is called a pumping section.

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