Threed Printing Maker Practice Exam

Question 1 Threed Printing Maker

What is the typical 3D print emissions concern?

An angled or unsupported feature. Ultrafine particles and VOCs from melted plastic. An efficient, isotropic pattern with good strength-to-weight. Arduino is a microcontroller; Pi is a full computer.

Question 2 Threed Printing Maker

What is the role of Creative Commons licenses?

Common licensing on Thingiverse and Printables. Sculpture, jewelry, custom design. Tooling, prototypes, custom parts. Multi-Material Upgrade for Prusa printers.

Question 3 Threed Printing Maker

What is a support structure?

Uncured resin is toxic; wear gloves and ventilate well. Printing with multiple colors or materials. Functional parts, larger objects, prototypes. Removable scaffolding for overhangs and floating features.

Question 4 Threed Printing Maker

What is glow-in-the-dark filament?

Always store with desiccant; print fresh from dryer when possible. Flammable; ventilation and safety required. A test print to optimize retraction settings. PLA with phosphorescent particles; charges in light.

Question 5 Threed Printing Maker

What is stringing?

Hair-like filament threads from inadequate retraction. ~200-300mm in each dimension. Sealed bags or dry boxes with desiccant. Cleaning the hot end by pulling filament out at low temperature.

Question 6 Threed Printing Maker

What is the role of community?

Smooth, shiny PLA variant; great aesthetic. A loop around the print to prime the nozzle. Forums, Discord, and Reddit communities accelerate learning. Bambu Lab A1, Prusa Mini+, Creality Ender 3 series, Anycubic Kobra series.

Question 7 Threed Printing Maker

What is "manufacturing on demand"?

Producing parts as needed rather than stockpiling. Often 1 kg; smaller 250-500g spools exist. An angled or unsupported feature. 0.4 mm; smaller for detail, larger for speed.

Question 8 Threed Printing Maker

What is metal filament?

Simple Benchy or calibration cube to validate setup. Multi-tool head systems with separate hot ends per material. Plastic with metal powder; can be sintered after printing. Many key patents have expired, enabling rapid consumer growth since 2009.

Question 9 Threed Printing Maker

What is ASA?

Arduino is a microcontroller; Pi is a full computer. UV-resistant alternative to ABS for outdoor parts. Acrylonitrile Butadiene Styrene — durable, heat-resistant; requires enclosed printer. Thermoplastic Polyurethane — flexible, rubber-like filament.

Question 10 Threed Printing Maker

What is the alternative to FDM color?

Like any craft, mastery takes many prints. Strong, durable filament; absorbs moisture. IDEX (independent dual extruder), painting, multi-color resin. Keep notes on settings that worked for each material.

Question 11 Threed Printing Maker

What is the term "additive manufacturing"?

The professional name for 3D printing; opposite of subtractive. UV-resistant alternative to ABS for outdoor parts. A shared workshop with tools for makers. ~45°; varies by material and cooling.

Question 12 Threed Printing Maker

What is FDM/FFF?

PLA with phosphorescent particles; charges in light. Fused Deposition Modeling / Fused Filament Fabrication — extruding melted plastic layer by layer. The internal structure of a print (often 10-30% for most uses). Input devices for makers' projects.

Question 13 Threed Printing Maker

What is topology optimization?

Very strong, heat-resistant engineering plastic; harder to print. A makerspace with specific equipment for digital fabrication. Forums, Discord, and Reddit communities accelerate learning. Removing material from non-stressed regions to minimize weight.

Question 14 Threed Printing Maker

What is "multi-material printing"?

Reddit, Discord, and forums are friendly to newcomers. A test print at varying temperatures to find optimal. Plastic with chopped carbon fiber for strength and stiffness. Printing with multiple colors or materials.

Question 15 Threed Printing Maker

What is the layer height?

Direct Metal Laser Sintering — metal SLS variant. Thickness of each printed layer (0.1-0.3mm common). A loop around the print to prime the nozzle. Wave-like artifacts caused by mechanical vibration.

Question 16 Threed Printing Maker

What is filament recycling?

A free, beginner-friendly CAD tool. Sensors that map the bed and compensate for irregularities. Some printers and devices recycle failed prints into new filament. A flat span between two supports.

Question 17 Threed Printing Maker

What is gyroid infill?

Sensors that map the bed and compensate for irregularities. Couture pieces, footwear, jewelry. An efficient, isotropic pattern with good strength-to-weight. Local production via networked printers reducing shipping.

Question 18 Threed Printing Maker

What is the future of 3D printing?

An efficient, isotropic pattern with good strength-to-weight. Color-changing PLA for visual interest. Faster, larger, multi-material, metals more accessible, integration with AI design. ~70-80°C for 8-12 hours.

Question 19 Threed Printing Maker

What is Blender?

Cutting material away (CNC machining, milling). A 3D modeling tool focused on art; usable for printing. Independent Dual Extruder; two independent print heads. Grid, gyroid, honeycomb, cubic, lines.

Question 20 Threed Printing Maker

What is PETG?

A tough, slightly flexible plastic; food-safe variants exist. A base coat before painting; fills small imperfections. Detailed models like miniatures, dental, jewelry. Stereolithography — curing liquid resin with UV light.

Question 21 Threed Printing Maker

What is the use of 3D printing in industry?

Prototyping, jigs, fixtures, end-use parts, dental, aerospace, medical. Inkjet-style binder onto powder; common for metals and sand molds. PLA (Polylactic Acid) plastic. Modifying existing models to create new designs.

Question 22 Threed Printing Maker

What is SLA?

Tuning printer settings for accuracy (e.g., extrusion, temperature). Stereolithography — curing liquid resin with UV light. Spiral printing producing a hollow, single-walled object. Strong, durable filament; absorbs moisture.

Question 23 Threed Printing Maker

What is the role of 3D printing in education?

A popular Wi-Fi/Bluetooth-enabled microcontroller. An efficient, isotropic pattern with good strength-to-weight. Stopping extrusion slightly before the end of a path to reduce blobbing. Hands-on STEM teaching tool.

Question 24 Threed Printing Maker

What is the print temperature for PETG?

Warps and emits fumes during printing. Brim touches the first layer; skirt is around but separate. ~220-250°C. CAD using dimensions that update the model when changed.

Question 25 Threed Printing Maker

What is the typical infill percentage?

Selective Laser Sintering — laser fuses powdered material (often nylon). 15-20% for general; 50%+ for functional parts. Printer adds material; cutter removes it. Prototyping, jigs, fixtures, end-use parts, dental, aerospace, medical.

Question 26 Threed Printing Maker

What is enclosure?

A box around the printer for temperature control and safety. Multiple printers running in parallel for production. ~45°; varies by material and cooling. Thermoplastic Polyurethane — flexible, rubber-like filament.

Question 27 Threed Printing Maker

What is firmware?

Software running directly on the printer's microcontroller. Always store with desiccant; print fresh from dryer when possible. FDM/FFF. Producing parts as needed rather than stockpiling.

Question 28 Threed Printing Maker

What is a microcontroller?

Thingiverse, Printables, Thangs, MyMiniFactory, Cults3D. A shared workshop with tools for makers. Speed when not extruding; faster than print speed. A small computer-on-a-chip running embedded code.

Question 29 Threed Printing Maker

What is the role of 3D printing in fashion?

Solidifies plastic quickly; critical for overhangs and bridges. Couture pieces, footwear, jewelry. Functional parts, larger objects, prototypes. Self-replicating 3D printer concept that birthed the maker printer movement.

Question 30 Threed Printing Maker

What is a skirt?

An angled or unsupported feature. Modifying existing models to create new designs. A loop around the print to prime the nozzle. Cleaning the hot end by pulling filament out at low temperature.

Question 31 Threed Printing Maker

What is the difference between resin and FDM strength?

Designing original 3D models for printing. 0.4 mm; smaller for detail, larger for speed. Resin is generally more brittle; FDM is more impact-resistant. Fumes (especially from ABS/resin), heat, electronics; ventilation matters.

Question 32 Threed Printing Maker

What is layer adhesion?

Pulling filament back to prevent oozing during travel moves. A budget-friendly Chinese printer maker. A bed maintained at temperature to improve adhesion and reduce warp. How well layers stick together; affects strength.

Question 33 Threed Printing Maker

What is "Z hop"?

5-20% depending on operator skill and printer reliability. Lifting the nozzle during travel moves to avoid scarring. A test print to optimize retraction settings. Tune first layer carefully; most failures start there.

Question 34 Threed Printing Maker

What is moisture absorption?

Ultrafine particles and VOCs from melted plastic. A faster firmware running on a Raspberry Pi alongside printer. Filament absorbs water from air, causing print issues. FDM/FFF.

Question 35 Threed Printing Maker

What is the Maker Bot story?

Speed when not extruding; faster than print speed. Pioneering desktop printer company; controversial open-source pivot. Brim touches the first layer; skirt is around but separate. 2K-8K LCD common; defines X/Y detail.

Question 36 Threed Printing Maker

What is rainbow filament?

A faster firmware running on a Raspberry Pi alongside printer. Very strong, heat-resistant engineering plastic; harder to print. Color-changing PLA for visual interest. Cura, PrusaSlicer, OrcaSlicer, Bambu Studio, Simplify3D.

Question 37 Threed Printing Maker

What is bioprinting?

Silica gel or other moisture-absorbing material. Printing with living cells for tissue engineering. Hands-on STEM teaching tool. The flat surface where the object is built.

Question 38 Threed Printing Maker

What is post-processing (resin)?

Post-processing prints: sanding, painting, smoothing. The professional name for 3D printing; opposite of subtractive. Wash in isopropyl alcohol (IPA), then UV cure. A popular Wi-Fi/Bluetooth-enabled microcontroller.

Question 39 Threed Printing Maker

What is "mass customization"?

UV-resistant alternative to ABS for outdoor parts. Speeding design, suggesting improvements, generating from prompts. Color-changing PLA for visual interest. Personalizing products at scale via digital workflows.

Question 40 Threed Printing Maker

What is the issue with ABS?

PLA mixed with wood fibers; prints with wood-like aesthetic. A computer-controlled machine that cuts material. A flat span between two supports. Warps and emits fumes during printing.

Question 41 Threed Printing Maker

What is a makerspace?

Very strong, heat-resistant engineering plastic; harder to print. A shared workshop with tools for makers. Solidifies plastic quickly; critical for overhangs and bridges. A common file format storing 3D mesh data for printing.

Question 42 Threed Printing Maker

What is nylon (3D printing)?

Lightweight components, fuel nozzles (GE LEAP), satellite parts. A popular Wi-Fi/Bluetooth-enabled microcontroller. NASA tested printing on the ISS; recycling and on-demand parts. Strong, durable filament; absorbs moisture.

Question 43 Threed Printing Maker

What is Creality?

How well layers stick together; affects strength. Plastic with metal powder; can be sintered after printing. Reddit, Discord, and forums are friendly to newcomers. A budget-friendly Chinese printer maker.

Question 44 Threed Printing Maker

What is priming?

Sculpture, jewelry, custom design. A base coat before painting; fills small imperfections. Acrylonitrile Butadiene Styrene — durable, heat-resistant; requires enclosed printer. A versatile tool for makers — patience and iteration unlock its potential.

Question 45 Threed Printing Maker

What is auto-bed leveling?

Wiping the nozzle along recent extrusion to clean before travel. Re-heating the top surface for smooth finish. Sensors that map the bed and compensate for irregularities. ~230-260°C.

Question 46 Threed Printing Maker

What is Cura?

A free, popular slicer by Ultimaker. Filament made from post-consumer or post-industrial plastic. Wash in isopropyl alcohol (IPA), then UV cure. A flat outline around the first layer for adhesion.

Question 47 Threed Printing Maker

What is G-code?

Personalizing products at scale via digital workflows. Software generating optimal designs from constraints. Tooling, prototypes, custom parts. The instruction language for CNC machines and 3D printers.

Question 48 Threed Printing Maker

What is the role of a profile?

Bambu Lab's multi-color filament loader. Pre-configured slicer settings for a specific printer/material. Removing material from non-stressed regions to minimize weight. Custom prosthetics, surgical guides, dental aligners, anatomical models.

Question 49 Threed Printing Maker

What is the difference between speed and quality?

A faster firmware running on a Raspberry Pi alongside printer. A small computer-on-a-chip running embedded code. Faster prints have more artifacts; slower prints are smoother. ~45°; varies by material and cooling.

Question 50 Threed Printing Maker

What is the role of a Y2K of 3D printing?

The mechanism feeding and melting filament. ~230-260°C. A common reference to the maker movement's growth. A Czech printer maker known for reliability and open-source ethos.