Home › Previous year questions › GATE 2024 PI › Question 16GATE 2024 PI – Question 16 Manufacturing Processes I · Metal Forming · 1 mark · Multiple choice
Match deep-drawing defects P: orange peel; Q: flange wrinkling; R: tearing at the bottom corner; S: earing at top edge, with causes 1: no blank-holder force; 2: very small punch corner radius; 3: large blank grains; 4: blank anisotropy.
P–3,Q–4,R–2,S–1 P–4,Q–1,R–3,S–2 P–3,Q–1,R–2,S–4 P–2,Q–3,R–1,S–4 Practise this question in The GATE Grind →
Show answer and explanation Correct answer: (C) P–3,Q–1,R–2,S–4
Explanation Large grains deform unevenly and produce orange peel. Without adequate blank holding, compressive flange stress causes wrinkling. A sharp punch corner concentrates strain and tears the bottom corner. Direction-dependent plastic flow causes earing. Thus **P–3,Q–1,R–2,S–4: C**.
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