3D Printing quiz

More questions about 3D Printing

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   Which dimension does 4D printing add?

   Answer: Time

   Why: Smart materials in the prints change shape on their own once a trigger such as water, heat or light reaches them.

2. 2 Medium

   Which text commands tell a 3D printer where to move?

   Answer: G-code

   Why: G-code was made for CNC machine tools, so a printer's G1 straight-line move is the same command a milling machine follows.

3. 3 Hard

   Where does electron beam melting build its parts?

   Answer: In a vacuum

   Why: Electrons scatter off gas molecules, so the beam needs a vacuum, while laser metal printers simply fill their chamber with argon or nitrogen.

4. 4 Easy

   Which process fuses nylon powder with a laser?

   Answer: SLS

   Why: The loose powder around each part holds it up during the build, so SLS prints need no support structures.

5. 5 Medium

   Which custom-fit devices are almost all made by 3D printing?

   Answer: Hearing aids

   Why: Each shell starts as a silicone impression of the wearer's ear canal, which is laser-scanned and then printed in light-curing resin.

6. 6 Hard

   What tool did Scott Crump first use to build a shape in layers?

   Answer: Hot glue gun

   Why: Crump's company Stratasys trademarked the name FDM, which is why the open-source RepRap community calls the same method FFF.