Discussion
Match the additive manufacturing technique in Column I with its corresponding input material in Column II.
| Additive manufacturing technique (Column I) | Input material (Column II) | ||
|---|---|---|---|
| P | Fused deposition modelling | 1 | Photo sensitive liquid resin |
| Q | Laminated object manufacturing | 2 | Heat fusible powder |
| R | Selective laser sintering | 3 | Filament of polymer |
| 4 | Sheet of thermoplastic or green compacted metal sheet | ||
Answer: A
The match is P-3, Q-4, R-2.
- Fused deposition modelling melts a filament of polymer (such as ABS or PLA) in a heated nozzle and lays it down bead by bead (3).
- Laminated object manufacturing cuts and bonds sheets, paper, thermoplastic or green compacted metal sheet, one layer at a time (4).
- Selective laser sintering uses a laser to fuse a bed of heat fusible powder, layer by layer (2).
The unused material, photo sensitive liquid resin (1), belongs to stereolithography, which cures resin with ultraviolet light; it is not the input for any of the three techniques listed, so every option using 1 is wrong. 'P-4, Q-1, R-4' also uses item 4 twice.
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