Engineering Board Exam Reviewer · Engineering Materials · hard
A rod is cold drawn from a diameter of 15 mm to 12 mm. What is the percent cold work?
- 20%
- 36%
- 56.25%
- 64%
Answer
B. 36%
Solution
%CW = (A0 - Ad)/A0 × 100 = (152 - 122)/152 × 100 = 36%.
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