Home › Previous year questions › GATE 2023 PI › Question 35GATE 2023 PI – Question 35 General Engineering · Engineering Materials · 1 mark · Numerical answer
A metal rod has initial diameter 14 mm. After a tensile test its fractured-end diameter is 12 mm. Find ductility as percentage reduction in area, to two decimals.
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Show answer and explanation Correct answer: 25.00 to 28.00
Explanation Percentage reduction in area is $100(A_0-A_f)/A_0=100[1-(12/14)^2]=26.5306\%$. Thus **26.53%**. The common π/4 factor cancels.
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