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GATE 2023 PI – Question 47

Manufacturing Processes I · Polymers and Composites · 2 marks · Multiple choice

Which is the most appropriate process for manufacturing a plastic chair?

  1. Injection molding
  2. Extrusion
  3. Calendering
  4. Blow molding

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Show answer and explanation

Correct answer: (A) Injection molding

Explanation

A chair needs a shaped three-dimensional cavity with integrated features and suitable wall thickness. Injection molding fills that cavity and supports high-volume production. Extrusion and calendering make continuous sections/sheets, while blow molding is primarily for hollow enclosed parts. **A**.

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