How to design and print 3D objects - Test
  • 1. What does CAD stand for in the context of 3D design?
A) Centralized Automated Drafting
B) Complex Assembly Diagram
C) Creative Art Development
D) Computer-Aided Design
  • 2. Which file format is most commonly used for 3D printing models?
A) DOCX
B) MP3
C) STL
D) JPEG
  • 3. What is 'slicing' in 3D printing?
A) Converting a 3D model into layers for printing
B) Melting the plastic filament
C) Smoothing the printed object
D) Creating the initial 3D model
  • 4. What is 'infill' in 3D printing?
A) The bed adhesion method
B) The type of plastic used
C) The outer shell of a 3D printed object
D) The internal structure of a 3D printed object
  • 5. Which of these materials is NOT commonly used in FDM 3D printing?
A) PLA
B) Resin
C) ABS
D) PETG
  • 6. What is bed adhesion?
A) The temperature of the nozzle
B) How well the first layer sticks to the print bed
C) The amount of infill used
D) The speed of the print head
  • 7. What does FDM stand for in 3D printing?
A) Fused Digital Manufacturing
B) Fused Deposition Modeling
C) Flexible Design Method
D) Fast Direct Manufacturing
  • 8. What is the purpose of 'supports' in 3D printing?
A) To add color to the model
B) To cool the model down
C) To support overhanging parts of the model
D) To increase the print speed
  • 9. Which factor most affects the strength of a 3D printed part?
A) Infill density
B) Print speed
C) Nozzle color
D) Bed temperature
  • 10. What is 'raft' in 3D printing?
A) A horizontal support printed under the object
B) A type of adhesive
C) A vertical support structure
D) A type of 3D printing material
  • 11. What is a common cause of warping in 3D prints?
A) Using the wrong nozzle size
B) Inadequate bed adhesion
C) Printing too slowly
D) Too much infill
  • 12. What does SLA 3D printing use to cure resin?
A) Air
B) Laser
C) Heat
D) Pressure
  • 13. What is the purpose of a 'brim'?
A) To create a smooth top layer
B) To cool down the print
C) To improve bed adhesion
D) To support overhangs
  • 14. Which software is commonly used for slicing 3D models?
A) Word
B) Cura
C) Photoshop
D) Excel
  • 15. What is the unit of measure for layer height?
A) Feet
B) Inches
C) Millimeters
D) Centimeters
  • 16. What is the purpose of 'calibration' in 3D printing?
A) To ensure accurate printing dimensions
B) To add color to the print
C) To speed up the printing process
D) To remove supports
  • 17. What is the typical temperature range for printing PLA?
A) 250-300°C
B) 180-220°C
C) 350-400°C
D) 50-80°C
  • 18. What type of 3D printing creates objects by selectively melting powder?
A) CLIP (Continuous Liquid Interface Production)
B) FDM (Fused Deposition Modeling)
C) SLS (Selective Laser Sintering)
D) SLA (Stereolithography)
  • 19. What is a common issue caused by printing too fast?
A) Stringing
B) Warping
C) Elephant's foot
D) Poor layer adhesion
  • 20. What is 'stringing' in 3D printing?
A) The sound the printer makes
B) A thick layer of plastic on the bottom of the print
C) A type of support structure
D) Thin strands of plastic between printed parts
  • 21. What is a common method to improve bed adhesion?
A) Decreasing the nozzle temperature
B) Applying an adhesive like glue or hairspray
C) Disabling supports
D) Increasing the layer height
  • 22. What is the purpose of 'retraction' settings?
A) To increase print speed
B) To prevent stringing
C) To improve bed adhesion
D) To change the color of the filament
  • 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) Supporting overhangs.
C) Priming the extruder and ensuring proper bed adhesion.
D) Removing excess filament.
  • 25. Which CAD program is known for its ease of use and suitability for beginners?
A) SolidWorks
B) CATIA
C) Tinkercad
D) AutoCAD
  • 26. What is a potential consequence of a clogged nozzle?
A) Improved bed adhesion
B) Perfect prints
C) Under-extrusion
D) Over-extrusion
  • 27. What is a benefit of using PETG filament?
A) Lower printing temperature than PLA.
B) Higher strength and flexibility compared to PLA.
C) Perfect bed adhesion every time.
D) Biodegradability.
  • 28. What does 'first layer calibration' typically involve?
A) Setting the print speed.
B) Enabling support structures.
C) Changing the filament color.
D) Adjusting the distance between the nozzle and the print bed.
  • 29. What is a common advantage of printing with a heated bed?
A) Lower filament cost.
B) Elimination of the need for support structures.
C) Increased print speed.
D) Reduced warping, especially with materials like ABS.
  • 30. What is the purpose of setting the 'Z-offset'?
A) Adjusting the X and Y axis movement.
B) Changing the language of the printer.
C) Controlling the filament flow rate.
D) Fine-tuning the distance between the nozzle and the build plate.
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