How to design and print 3D objects
  • 1. What does CAD stand for in the context of 3D design?
A) Complex Assembly Diagram
B) Creative Art Development
C) Computer-Aided Design
D) Centralized Automated Drafting
  • 2. Which file format is most commonly used for 3D printing models?
A) MP3
B) DOCX
C) JPEG
D) STL
  • 3. What is 'slicing' in 3D printing?
A) Creating the initial 3D model
B) Melting the plastic filament
C) Converting a 3D model into layers for printing
D) Smoothing the printed object
  • 4. What is 'infill' in 3D printing?
A) The internal structure of a 3D printed object
B) The outer shell of a 3D printed object
C) The type of plastic used
D) The bed adhesion method
  • 5. Which of these materials is NOT commonly used in FDM 3D printing?
A) PLA
B) ABS
C) PETG
D) Resin
  • 6. What is bed adhesion?
A) The temperature of the nozzle
B) The amount of infill used
C) The speed of the print head
D) How well the first layer sticks to the print bed
  • 7. What does FDM stand for in 3D printing?
A) Fused Deposition Modeling
B) Fast Direct Manufacturing
C) Fused Digital Manufacturing
D) Flexible Design Method
  • 8. What is the purpose of 'supports' in 3D printing?
A) To cool the model down
B) To support overhanging parts of the model
C) To add color to the model
D) To increase the print speed
  • 9. Which factor most affects the strength of a 3D printed part?
A) Nozzle color
B) Bed temperature
C) Infill density
D) Print speed
  • 10. What is 'raft' in 3D printing?
A) A type of adhesive
B) A type of 3D printing material
C) A vertical support structure
D) A horizontal support printed under the object
  • 11. What is a common cause of warping in 3D prints?
A) Using the wrong nozzle size
B) Printing too slowly
C) Too much infill
D) Inadequate bed adhesion
  • 12. What does SLA 3D printing use to cure resin?
A) Laser
B) Pressure
C) Air
D) Heat
  • 13. What is the purpose of a 'brim'?
A) To improve bed adhesion
B) To create a smooth top layer
C) To cool down the print
D) To support overhangs
  • 14. Which software is commonly used for slicing 3D models?
A) Word
B) Cura
C) Excel
D) Photoshop
  • 15. What is the unit of measure for layer height?
A) Millimeters
B) Feet
C) Centimeters
D) Inches
  • 16. What is the purpose of 'calibration' in 3D printing?
A) To add color to the print
B) To remove supports
C) To speed up the printing process
D) To ensure accurate printing dimensions
  • 17. What is the typical temperature range for printing PLA?
A) 50-80°C
B) 250-300°C
C) 350-400°C
D) 180-220°C
  • 18. What type of 3D printing creates objects by selectively melting powder?
A) FDM (Fused Deposition Modeling)
B) SLS (Selective Laser Sintering)
C) CLIP (Continuous Liquid Interface Production)
D) SLA (Stereolithography)
  • 19. What is a common issue caused by printing too fast?
A) Stringing
B) Poor layer adhesion
C) Elephant's foot
D) Warping
  • 20. What is 'stringing' in 3D printing?
A) Thin strands of plastic between printed parts
B) A type of support structure
C) A thick layer of plastic on the bottom of the print
D) The sound the printer makes
  • 21. What is a common method to improve bed adhesion?
A) Decreasing the nozzle temperature
B) Disabling supports
C) Applying an adhesive like glue or hairspray
D) Increasing the layer height
  • 22. What is the purpose of 'retraction' settings?
A) To improve bed adhesion
B) To increase print speed
C) To change the color of the filament
D) To prevent stringing
  • 23. What does the term 'overhang' refer to?
A) A part of the model that extends outward without support directly underneath.
B) The brand of the 3D printer.
C) The height of the print bed.
D) The type of filament being used.
  • 24. What is a typical use for a 'skirt'?
A) Creating a decorative border around the print.
B) Removing excess filament.
C) Supporting overhangs.
D) Priming the extruder and ensuring proper bed adhesion.
  • 25. Which CAD program is known for its ease of use and suitability for beginners?
A) CATIA
B) Tinkercad
C) SolidWorks
D) AutoCAD
  • 26. What is a potential consequence of a clogged nozzle?
A) Improved bed adhesion
B) Perfect prints
C) Over-extrusion
D) Under-extrusion
  • 27. What is a benefit of using PETG filament?
A) Biodegradability.
B) Perfect bed adhesion every time.
C) Higher strength and flexibility compared to PLA.
D) Lower printing temperature than PLA.
  • 28. What does 'first layer calibration' typically involve?
A) Adjusting the distance between the nozzle and the print bed.
B) Setting the print speed.
C) Changing the filament color.
D) Enabling support structures.
  • 29. What is a common advantage of printing with a heated bed?
A) Reduced warping, especially with materials like ABS.
B) Lower filament cost.
C) Increased print speed.
D) Elimination of the need for support structures.
  • 30. What is the purpose of setting the 'Z-offset'?
A) Changing the language of the printer.
B) Adjusting the X and Y axis movement.
C) Controlling the filament flow rate.
D) Fine-tuning the distance between the nozzle and the build plate.
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