3D Printer Assessment - Missed Questions

Which unit of measurement is used in TinkerCAD?

• centimeters

• feet

• inches

• millimeters

Answer explanation

TinkerCAD primarily uses millimeters as its unit of measurement, making it easier for users to create precise designs, especially for 3D printing and modeling. Therefore, the correct answer is millimeters.

Which object do you think would best be printed using a 3D printer?

• 
• 
• 
• 

What is the process of 3D printing called?

• Layering

• Stacking

• Printing

Answer explanation

The process of 3D printing is called layering because it involves creating objects by adding material layer by layer until the final shape is achieved. This distinguishes it from other methods like stacking or simply printing.

What type of filament do the 3D printers in the STEM Lab use?

• ABS (petroleum-based)

• Google SketchUp

• TinkerCAD

• PLA (plant-based)

Answer explanation

The 3D printers in the STEM Lab use PLA (plant-based) filament, which is biodegradable and derived from renewable resources, making it an eco-friendly choice compared to ABS, which is petroleum-based.

Which part of the printer changes the state of matter of the filament?

• The base.

• The extruder.

• The nozzle.

• The filament tube.

Answer explanation

The extruder is the part of the printer that heats the filament, changing it from a solid to a molten state, allowing it to be shaped and deposited through the nozzle during the printing process.

All of these are reasons why 3D printers were not widely used before 2000, except:

• 3D printers were too big.

• 3D printers were too expensive.

• 3D printers weren't invented yet.

Answer explanation

The correct choice is '3D printers weren't invented yet' because it indicates a lack of existence, while the other options refer to limitations of existing printers. Thus, this reason does not fit the context.