GATE Manufacturing Processes I: Metal Forming – Previous Year Questions
16 GATE previous year questions on Metal Forming (Manufacturing Processes I, Production and Industrial Engineering) with answers and explanations, from every paper.
- GATE 2021 PI Q53 – A wire is drawn from 5 mm to 4 mm diameter through a conical die at pulling speed 5 m/s. Neglect friction/redundant work. Drawing stress is…
- GATE 2021 PI Q65 – A 3.5 mm sheet is plane-strain rolled in a two-high mill. Both rolls have diameter 500 mm and speed 200 rpm. Friction coefficient is 0.08; roll…
- GATE 2022 PI Q49 – Hot working occurs at homologous temperature 0.8. The metal melts at 800°C. Find working temperature in °C, nearest integer.
- GATE 2022 PI Q50 – A 30 mm diameter, 40 mm high cylinder is open-die forged between platens. Assume perfect plasticity, flow stress 300 MPa. Find ideal load at 30%…
- GATE 2023 PI Q22 – A copper rod 200 mm in diameter and 400 mm long is extruded to diameter 100 mm. Find the extrusion ratio.
- GATE 2023 PI Q43 – Match products P: beverage can; Q: seamless pipe; R: connecting rod; S: bearing steel balls, with processes 1: forging; 2: skew rolling; 3: extrusion;…
- GATE 2024 PI Q16 – 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…
- GATE 2024 PI Q35 – A 100 mm diameter blank is cut from 2 mm sheet. Radial punch–die clearance is 6% of sheet thickness. Find punch diameter (two decimal mm).
- GATE 2024 PI Q39 – Plastic deformation begins in plane stress at principal stresses 200 and 100 MPa. Under von Mises yielding, find uniaxial tensile yield strength (one…
- GATE 2024 PI Q53 – A cold-rolling pass reduces a plate to 3 mm using 400 mm diameter rolls at 300 rpm. Roll elastic deflection is negligible, bite angle 10°, and neutral…
- GATE 2025 PI Q45 – A perfectly plastic wire has flow stress 300 MPa. During ideal frictionless drawing, back tension is zero and front tension is 200 MPa. Find…
- GATE 2025 PI Q46 – A cold-rolling process without front/back tensions requires minimum friction coefficient 0.04. Assume large rolls. If draft doubles and roll diameters…
- GATE 2026 PI Q26 – Match defects P: centerburst; Q: earing; R: zipper cracks; S: cold shut, with processes 1: deep drawing; 2: rolling; 3: extrusion; 4: closed-die…
- GATE 2026 PI Q30 – A 50 mm square is blanked from a 2 mm strip of shear strength 200 MPa. Neglect clearance and friction. Find minimum force for a single operation, in…
- GATE 2026 PI Q39 – Sheet-metal drawing is feasible if reduction ratio < 0.5 and thickness/diameter ratio > 1%. A 2 mm sheet is drawn with a 100 mm punch using various…
- GATE 2026 PI Q46 – A 200 mm wide, 23 mm thick strip must be rolled to 20 mm in one pass with 200 mm diameter rolls. Available lubricants P,Q,R,S have friction…