2024 STEM Semester I Review

What does FDM stand for in 3D printing?

• Fused Deposition Modeling

• Filament Design Manufacturing

• Fused Development Mechanism

• Functional Design Model

Which part of the 3D printer holds the filament spool?

• Gantry

• Carriage

• Filament holder

• Build plate

What is the purpose of slicing software?

• To design models

• To convert 3D models into layers for printing

• To cool the printer

• To clean the extruder

What is the function of a raft in 3D printing?

• To stabilize the base of the print

• To connect overhanging parts

• To provide ventilation for the filament

• To increase nozzle temperature

Which two factors affect the strength of a 3D print the most?

• Filament type and slicing software

• Shell thickness and infill percentage

• Nozzle diameter and print temperature

• Build plate calibration and layer height

A print has weak and brittle parts. What settings should you adjust to improve the strength of future prints?

• Increase infill percentage and add more shells

• Reduce extruder temperature and add a raft

• Lower print speed and reduce the filament diameter

• Increase filament retraction and adjust slicer scale

Which elements of a design are supported by "supports" in 3D printing? (Select all that apply)

• Overhanging sections

• Internal voids

• Bridging structures

• Raft edges

You want a design with a smooth finish and strong structure. Which slicer settings should you prioritize?

• High infill, low layer height, and multiple shells

• Low infill, tall layer height, and single shells

• High infill, no supports, and no raft

• Moderate infill, tall layer height, and fewer shells

A company is prototyping a lightweight yet strong drone part using 3D printing. Which design considerations would you recommend? (Select all that apply)

• Optimize infill density to reduce weight while maintaining strength

• Use PLA filament for its strength and low melting point

• Increase shell thickness for external durability

• Avoid using supports to reduce material waste

A filament spool runs out midway through a print. What steps would you follow to resume printing successfully?

• Replace the filament, purge the nozzle, and resume the print

• Restart the entire print from the beginning

• Reload the filament and adjust the slicer settings mid-print