3D Printing Quiz PDF

True or False 1.​ Vertical holes in a print are generally more accurate to size than horizontal holes because vertical holes are created when the printhead moves in the X and Y dimensions of a print, which are the most stable dimensions. ○​ True ○​ False 2....

True or False 1.​ Vertical holes in a print are generally more accurate to size than horizontal holes because vertical holes are created when the printhead moves in the X and Y dimensions of a print, which are the most stable dimensions. ○​ True ○​ False 2.​ The total material cost for pricing in a 3D print project can be calculated by multiplying the cost per unit (such as cost per gram or cost per mL) of your printed material by the estimated amount of material shown when prepping the project file(s) in your slicer. ○​ True ○​ False 3.​ Most low cost SLA printers feature an Infrared Spectrum lamp that is used to selectively cure resin. ○​ True ○​ False 4.​ 3D printing avoids the need for fixtures because it doesn’t require additional tools or setups. ○​ True ○​ False Multiple Choice 5.​ Which type of intellectual property rights protects the ownership of the shape of an object in 3D printing?​ a. Copyright​ b. Patent​ c. Registered Trademark​ d. Fair Use​ e. None of the above 6.​ What is the primary goal of Just-in-Time (JIT) manufacturing in relation to parts and assembly processes?​ a. Reducing overall inventory costs to the manufacturer.​ b. Maximizing storage space for parts on the production floor.​ c. Decreasing spoilage of parts on site.​ d. Minimizing the arrival of parts as they are needed. 7.​ What technology is being developed by Concordia University in Montreal that uses ultrasonic frequencies to construct complex objects?​ a. Bio-printing​ b. Stereolithography (SLA)​ c. Direct Sound Printing (DSP)​  d. Direct Metal Laser Sintering (DMLS)​ e. Selective Laser Sintering (SLS) 8.​ How is the direct hourly wage of an employee related to their total cost to the employer?​ a. The costs to the employer are unrelated to the direct hourly wage of an employee.​ b. Employer costs include the direct hourly wage of an employee plus additional costs that vary depending on additional factors.​ c. Employer costs are a fixed percentage of the direct hourly wage of an employee.​ d. The direct hourly wage includes all costs to the employer. 9.​ Which of the following is an additional consumable cost associated with certain 3D printing processes?​ a. Print Heads​ b. Taxes​ c. Shipping Costs​ d. Administrative Fees​ e. Labor Expenses Multi-Select 10.​What are potential advantages of 3D printing technology in crisis situations, as highlighted in the presentation? ​ Improved transportation infrastructure ​ Flexibility and speed in production ​ Enhanced communication networks ​ Reduced dependency on energy sources ​ Better resource allocation 11.​What are the main factors to consider when estimating the costs for custom manufacturing in 3D printing? ​ Material(s) ​ Distribution of Digital Goods ​ Capital Investment ​ Overhead ​ Labor 12.​Common reasons that a print may take longer than the estimate shown in your preparation / slicer software include: ​ The heating element(s) draws energy off of the drive motors in an unpredictable fashion, causing the print head to move slower when the heater is engaged and causing "drift" in the estimated vs actual print time ​ The time the printer takes to wind the spool to the correct tension ​ The time the printer takes to home or self-calibrate prior to starting a print ​ The time the printer takes to heat up the print head ​ The time the printer takes to solidify the extruded material between each layer  13.​In the last decade, SLA 3D Printing has been widely adopted by the following industries / hobbies: ​ Dentistry ​ Jewelry Making ​ Table-top Gaming (e.g., D&D, Warhammer) ​ Duck Calls (Whistles) ​ Kubb (the Viking lawn game) 14.​What does "3D printing avoids the need for fixtures" mean in the context of this lecture? ​ 3D printing doesn't use materials ​ 3D printing eliminates the need for product designs ​ 3D printing reduces fixed labor costs ​ 3D printing doesn't require additional tools or setups ​ 3D printing doesn't require equipment maintenance 15.​What are the main factors to consider when estimating the costs for custom manufacturing in 3D printing? ​ Material(s) ​ Distribution of Digital Goods ​ Capital Investment ​ Overhead ​ Labor 16.​What significant limitation is associated with photogrammetry as a 3D scanning method? ​ The scans produced are not photorealistic. ​ It is incapable of scanning textured objects. ​ It lacks a reliable scale for measurements. ​ It requires expensive equipment. 17.​What is the main application of motion capture (mocap) technology, a form of 3D scanning? ​ Producing realistic animations of human movements. ​ Creating photorealistic portraits. ​ Scanning historical buildings for restoration. ​ Digitizing 2D images for virtual tours. ​ Measuring dental impressions for prosthetics. 18.​What does "3D printing avoids the need for fixtures" mean in the context of this lecture? ​ 3D printing doesn't use materials ​ 3D printing eliminates the need for product designs ​ 3D printing reduces fixed labour costs ​ 3D printing doesn't require additional tools or setups ​ 3D printing doesn't require equipment maintenance True/False Questions 1.​ Binder Jetting is a 3D printing technology in which a powder layer is spread and a liquid binder is deposited on a powder bed by a print head. ○​ True ○​ False 2.​ SLM (Selective Laser Melting) is a 3D printing technology in which powder is laid down on the bed, excess powder is removed, and a laser images the shape in the powder. ○​ True ○​ False 3.​ Material Jetting is a 3D printing technology in which a print head passes over the build platform, laying down a photopolymer and wax material, and a UV lamp then cures the photopolymer. ○​ True ○​ False 4.​ Isopropyl Alcohol is used for cleaning the print bed. ○​ True ○​ False 5.​ ABS Juice is used for preparing a print bed for printing ABS and contains acetone. ○​ True ○​ False 6.​ Hydroscopic refers to the property of filament that makes it absorb water from the air. ○​ True ○​ False 7.​ Bridging occurs when the printer is required to print between two supports or anchor points. ○​ True ○​ False 8.​ CAD is a method of design where a computer program is used to create 3D objects in the form of electronic files. ○​ True ○​ False 9.​ G-code is a programming language used in computer-aided manufacturing to control automated machine tools. ○​ True ○​ False 10.​Thermoplastic is a polymer that becomes pliable or moldable above a specific temperature and returns to a solid state upon cooling. ○​ True ○​ False 11.​Slicing is the process of taking a 3D model and translating it into individual layers for 3D printing. ○​ True  ○​ False 12.​Tramming refers to the adjustment of the build platform to ensure it is parallel to the print head. ○​ True ○​ False 13.​PLA is a biodegradable plastic made of cornstarch or sugar cane. ○​ True ○​ False 14.​Nylon is a highly flexible filament made from rubber. ○​ True ○​ False 15.​The extruder drive mechanism grabs the filament and extrudes it through the hot end. ○​ True ○​ False Multiple Choice Questions 16.​What is the print temperature for PLA?​ a. 180°C​ b. 210°C​ c. 220°C​ d. 250°C 17.​What is the bed temperature for PLA?​ a. 50°C​ b. 60°C​ c. 70°C​ d. 100°C 18.​Which of the following is the best description of an extruder?​ a. A device that melts the filament​ b. A part of the 3D printer that ejects material in liquid or semi-liquid form​ c. A cooling fan​ d. A device used for slicing models 19.​What does "FDM" stand for?​ a. Fused Deposition Modeling​ b. Fast Deposition Manufacturing​ c. Flexible Digital Modeling​ d. Fluid Data Model 20.​Which of the following filaments is known for its biodegradability?​ a. ABS​ b. PLA​ c. Nylon​ d. PC 21.​What is the purpose of a heated bed in 3D printing?​ a. To prevent warping and improve adhesion​ b. To accelerate cooling​ c. To speed up extrusion​ d. To cure the resin 22.​Which filament is commonly used for creating prototypes and products that require flexibility?​ a. ABS​ b. TPE​ c. PLA​ d. HIPS 23.​Which of the following technologies uses a laser to cure a liquid resin layer by layer?​ a. SLA​ b. FDM​ c. SLS​ d. Material Jetting 24.​Which of the following materials is used as support material for models in 3D printing, and can be dissolved in water?​ a. HIPS​ b. PVA​ c. PVA​ d. Nylon 25.​What is the primary function of a heated extruder in 3D printing?​ a. To help cool the filament​ b. To soften the filament​ c. To melt the filament​ d. To control the flow of filament 26.​Which of the following is a high-strength, durable, and flexible filament ideal for mechanical parts?​ a. PLA​ b. Nylon​ c. ABS​ d. HIPS 27.​What type of extruder is ideal for printing flexible filaments?​ a. Bowden extruder​ b. Direct drive extruder​ c. Gantry extruder​ d. Dual extruder 28.​Which of the following terms refers to a 3D model file format used in 3D printing?​ a. DXF​ b. OBJ​ c. STL​ d. GIF  29.​Which of the following is a common post-processing method for 3D prints made with ABS filament?​ a. Smoothing with acetone​ b. Sanding​ c. Heat treatment​ d. Painting 30.​Which of the following 3D printing technologies uses powder material that is selectively sintered by a laser?​ a. FDM​ b. SLS​ c. SLA​ d. Material Jetting Multi-Select Questions 31.​Which of the following are common 3D printing technologies? (Select all that apply) ○​ FDM ○​ SLA ○​ SLS ○​ Binder Jetting ○​ Material Jetting 32.​Which of the following are common 3D printing filaments? (Select all that apply) ○​ PLA ○​ ABS ○​ HIPS ○​ Nylon ○​ PVA 33.​Which of the following are common 3D printing defects? (Select all that apply) ○​ Stringing ○​ Warping ○​ Under-extrusion ○​ Over-extrusion ○​ Layer separation 34.​Which of the following are advantages of FDM 3D printing? (Select all that apply) ○​ Low cost for prototyping ○​ Wide variety of material options ○​ Rapid prototyping ○​ Can print complex geometries ○​ High resolution 35.​Which of the following are used for supports in 3D printing? (Select all that apply) ○​ PVA ○​ HIPS  ○​ PLA ○​ Nylon ○​ ASA 36.​Which of the following are post-processing methods commonly used for 3D prints? (Select all that apply) ○​ Smoothing with Acetone ○​ Sanding ○​ Hydrodipping ○​ Painting ○​ Heat treatment Additional Questions 37.​What is the size of the filament typically used in 3D printing?​ a. 1.75 mm​ b. 2.0 mm​ c. 3.0 mm​ d. 4.0 mm 38.​Which of the following is the nozzle size typically used for 3D printing?​ a. 0.5 mm​ b. 0.4 mm​ c. 0.3 mm​ d. 0.2 mm 39.​What does the "gantry" refer to in 3D printing?​ a. The frame structure supporting the printer head​ b. The print bed​ c. The extruder​ d. The cooling fan 40.​What is the function of the "extruder" in 3D printing?​ a. To guide the print head​ b. To push the filament through the hot end​ c. To cool the filament​ d. To slice the 3D model 41.​Which of the following materials is typically used to create supports that can be dissolved?​ a. PLA​ b. ABS​ c. PVA​ d. Nylon 42.​Which of the following is known as an open-source movement that involves 3D printers creating parts for more 3D printers?​ a. RepRap​ b. RepRap​  c. MakerBot​ d. Prusa 43.​Which of the following filaments is known for its resistance to heat and impact, and is transparent?​ a. ASA​ b. PC​ c. PLA​ d. Nylon 44.​What does the "build platform" refer to in 3D printing?​ a. The software used to slice models​ b. The heated bed​ c. The flat surface where the print is built​ d. The extruder 45.​What is the "bowden extruder"?​ a. Extruder where the drive gear is separated from the hot end with tubing​ b. Extruder with direct drive mechanism​ c. Extruder for flexible filaments​ d. Extruder for high-temperature filaments Finishing Questions 46.​What does "manifold" refer to in 3D printing?​ a. An object where every triangle edge is shared by two and only two triangles​ b. A type of extruder​ c. A support material​ d. A type of 3D model 47.​Which of the following is a way to reduce stringing in 3D prints?​ a. Increase the print temperature​ b. Decrease the retraction settings​ c. Increase the print speed​ d. Use a larger nozzle 48.​Which of the following is the function of the "drive gear" in a 3D printer?​ a. To extrude filament​ b. To grab the filament and push it through the hot end​ c. To heat the filament​ d. To cool the filament 49.​What is "post-processing" in 3D printing?​ a. The process of printing the model​ b. Things you can do after the print comes off the platform​ c. The slicing process​ d. Preparing the model for printing 50.​Which of the following are used to support an object during printing in areas with no material underneath?​ a. Support structures​ b. PLA​ c. Dual extruder systems​ d. Filament removal tools