ISRO Mechanical & Aerospace 2025 - Question 74

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Topic: Manufacturing Processes

In Selective Laser Sintering (SLS), what is typically used as the build material?

  • A. Liquid photopolymer
  • B. Thermoplastic filament
  • C. UV-curable resin
  • D. Powdered polymers or metals

Answer: D. Powdered polymers or metals

Explanation: Selective Laser Sintering (SLS) is an additive manufacturing technique that uses a high power laser to sinter small particles of polymer powder (and sometimes metal/ceramic powders) into a solid 3D structure.

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