STEM 3D Printing & Maker Spaces 2

Question 1

Which slicing parameter most directly controls the structural strength of a 3D-printed part along the Z-axis?

Accepted Answer

Layer height

Answer

Smaller layer heights create more bonding surface between layers, increasing Z-axis tensile strength.

Question 2

A student's FDM print has stringing between features. Which slicer setting change is most likely to fix this?

Accepted Answer

Increase retraction distance

Answer

Increasing retraction distance pulls filament back into the nozzle during travel moves, reducing ooze and stringing.

Question 3

In a maker space safety protocol, which personal protective equipment (PPE) is most appropriate when sanding resin SLA prints?

Accepted Answer

Nitrile gloves and a dust/respirator mask

Answer

Uncured resin particles released during sanding are skin sensitizers and respiratory hazards, requiring gloves and a respirator.

Question 4

Which 3D printing technology uses a UV-curable liquid resin selectively solidified by a light source?

Accepted Answer

Stereolithography (SLA)

Answer

Stereolithography (SLA) cures liquid photopolymer resin layer by layer using a UV laser or light source.

Question 5

An educator wants students to practice iterative design. Which maker space workflow best supports this?

Accepted Answer

Design, print, test, and redesign in rapid cycles

Answer

Iterative design cycles (design-print-test-redesign) teach engineering practice and reinforce the design process standard.

(STEM) Certified Science Technology Engineering Mathematics Educator Practice Test