GATE Manufacturing Processes I: Polymers and Composites – Previous Year Questions

6 GATE previous year questions on Polymers and Composites (Manufacturing Processes I, Production and Industrial Engineering) with answers and explanations, from every paper.

1. GATE 2022 PI Q16 (1 mark, Multiple choice) – In injection blow molding of plastic beverage bottles, blowing is accomplished using what medium?
2. GATE 2023 PI Q47 (2 marks, Multiple choice) – Which is the most appropriate process for manufacturing a plastic chair?
3. GATE 2024 PI Q38 (2 marks, Multiple choice) – Match polymer processes P: extrusion; Q: injection molding; R: blow molding; S: compression molding, with applications 1: complex close-tolerance…
4. GATE 2025 PI Q21 (1 mark, Multiple choice) – Which statement about injection molding a polymer composite is FALSE?
5. GATE 2026 PI Q36 (2 marks, Multiple choice) – The figure gives polymer-extrusion product sections P,Q and available die openings 1–4. Which mapping most likely matches products to dies? Sections…
6. GATE 2026 PI Q65 (2 marks, Numerical answer) – In the composite filament-winding process shown, a 700 mm mandrel rotates at 6 rev/min. Find axial slider speed v c (m/s, two decimals) for a 45°…