How to practice Metal Form

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–2 of 2. Imported answers require independent review unless marked reviewed.

Topic practice 2 questionsPage 1 of 1

Question 45

Open question
PINAT2 marksNeeds review
In a wire drawing of a perfectly-plastic material with flow stress of 300 MPa, the back tension is zero and front tension is 200 MPa. Assuming ideal deformation with zero friction, the percentage reduction of the cross-sectional area of the wire is________. (Rounded off to one decimal place)

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Question 46

Open question
PINAT2 marksNeeds review
In a cold rolling process without front and back tensions, the required minimum coefficient of friction is 0.04. Assume large rolls. If the draft is doubled and roll diameters are halved, then the required minimum coefficient of friction is________. (Rounded off to two decimal places)

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