Exercises
- 1. Explain 3D Systems’ selective laser sintering (SLS).
- 2. Discuss 3D Systems’ ColorJet printing (CJP) technology.
- 3. Describe EOS's EOSINT systems.
- 4. Briefly describe Optomec’s laser engineered net shaping (LENS) and aerosol jet system.
- 5. Explain the concept of Arcam’s electron beam melting (EBM).
- 6. Briefly discuss Concept Laser’s LaserCUSING.
- 7. Briefly write about SLM Solutions’ selective laser melting (SLM).
Multiple-Choice Questions
l. What is the full name of SLS?
- a) Selective laser simulator
- b) Sintering laser simulator c) Selective laser sintering
- d) Stereolithography laser sintering Ans: (c)
- 2. What is the other name for multi-jet modeling?
- a) FDM
- b) PolyJet
- c) 3D printer
- d) Extrusion Ans: (b)
- 3. Which one of the following is the design process?
- a) Build
- b) Concept
- c) Pre-processing
- d) Transfer to machine Ans: (b)
- 4. What is the file format for prototyping?
- a) .prt
- b) .sit
- c) .stl
- d) .iges Ans: (c)
- 5. Which CAD software cannot be used to create data for prototyping?
- a) CREO
- b) CATIA
- c) NX UniGraphics
- d) Adobe Illustrator Ans: (d)
- 6. Which one of the following processes is subtractive prototyping?
- a) 5-axis CNC milling
- b) Fused deposition modeling
- c) Multi-jet modeling
- d) Stereolithography apparatus Ans: (a)
- 7. In which of the following processes are the input materials in solid form?
- a) SLA
- b) SLS
- c) FDM
- d) MJM Ans: (c)
- 8. In which of the following processes are the input materials in liquid form?
- a) LOM
- b) SLS c) FDM
- d) MJM
Ans: (d)
- 9. In which of the following processes are the input materials in powder form?
- a) LOM
- b) SLS
- c) FDM
- d) MJM Ans: (b)
- 10. Which material is NOT available for the LOM process?
- a) Paper
- b) Plastic
- c) Metal
- d) Glass Ans: (d)
- 11. Which of the following processes uses the extrusion concept?
- a) SLA
- b) SLS
- c) FDM
- d) MJM Ans: (d)
- 12. Which model of 3D printer is available in PERDA-TECH?
- a) Z310
- b) Z450
- c) Z510
- d) Z650 Ans: (c)
- 13. Which of the following is NOT the color binder of a 3D printer?
- a) Cyan
- b) Black
- c) Magenta
- d) Yellow Ans: (b)
- 14. Which of the following is the process of the pre-processing stage?
- a) Remove support
- b) Checking 3D CAD data
- c) De-powdering loose material
- d) Dip in binder to strengthen the part Ans: (b)
- 15. What is the infiltrant used to strengthen parts in the Z510 machine?
- a) Water
- b) Paint
- c) Epson salt
- d) Color bond Ans: (d)
