3D PRINTER
A student is researching 3D printing and comes across different sources:
Source A: A research paper discussing the future of 3D printing in medicine.
Source B: A social media post from a hobbyist about their first 3D print.
Source C: A user manual explaining how to set up and operate a 3D printer.
Source D: A company website advertising different models of 3D printers. Which sources provide technical and reliable information for understanding how a 3D printer works?
Source A and Source C
Which of the following correctly describes the relationship between the print bed and the extruder in a 3D printer?
A. The print bed heats the filament before it is extruded from the nozzle
B. The extruder controls the movement of the print bed during printing.
C. The extruder moves to deposit filament onto the print bed to form the object.
D. The print bed and extruder are separate components that do not interact to one another.
C. The extruder moves to deposit filament onto the print bed to form the object.
Which of the following statements best acknowledges the purpose of an STL file in 3D printing?
A. STL files contain text instructions for assembling a 3D printer.
B. STL files are used to design websites and digital animations.
C. STL files store 3D object data using a series of small triangles to represent surfaces.
D. STL files are physical blueprints used in traditional manufacturing for making 3D printing
C. STL files store 3D object data using a series of small triangles to represent surfaces.
Which filament is best supported by evidence for printing objects that require high heat resistance?
A. Nylon, because it can withstand high temperatures without deforming.
B. PLA, because it exhibits lower printing temperatures, thus easier to use.
C. TPE, because it demonstrates flexibility and rubber-like qualities, not heat resistance.
D. Wood-PLA, because it integrates natural wood fibers, providing a unique texture.
A. Nylon, because it can withstand high temperatures without deforming.
You are an engineer, and you find the following:
SLA excels in detail but requires post-processing.
SLS prints strong, complex parts but is expensive.
FDM is the most affordable but lacks fine details. Which general conclusion is best based on these findings?
A. Different printing methods serve different needs depending on cost, strength, and detail.
B. SLS is the best for all applications since it is the strongest method among the other type of filament.
C. FDM is superior because it is cheaper, making it the best option for industries and other 3D projects.
D. SLA is the fastest and most cost-effective method for all professional prints for 3D products.
A. Different printing methods serve different needs depending on cost, strength, and detail.
A teacher asks students to explain the function of the printer's stepper motors. Which of the following responses best shows an understanding that there are different pieces of information about it?
A. Stepper motors control precise movements of the extruder
B. Stepper motors are small electrical components that spin when powered.
C. Stepper motors are used in many machines, including robots and cameras.
D. Stepper motors can make a high-pitched noise when they move quickly.
A. Stepper motors control precise movements of the extruder
A 3D printer operator notices that prints are not sticking well to the build plate, causing warping. The operator checks different parts of the printer to identify the issue. Which of the following parts is most likely causing the problem?
A. Extruder, because it controls the filament feed rate.
B. Build Plate, because an uneven or cold surface can prevent adhesion.
C. Cooling Fan, because it helps solidify prints faster.
D. Stepper Motor, because it moves the print head along the axes.
B. Build Plate, because an uneven or cold surface can prevent adhesion.
A teacher asks a student to explain why STL files are widely used in 3D printing. Which of the following is the best response?
A. STL files are widely used because they provide a simple, universal format for describing 3D objects, making them compatible with most slicer software.
B. STL files are used because they are the only file type that can store 3D designs making them compatible with most slicer software.
C. STL files are mainly used because they contain color and texture data for 3D printing making them compatible with most slicer software.
D. STL files are important because they control the heating settings of a 3D printer making them compatible with most slicer software.
A. STL files are widely used because they provide a simple, universal format for describing 3D objects, making them compatible with most slicer software.
A 3D printing guide wants to arrange filament types by durability, from the strongest to the weakest: Nylon – High wear resistance, impact-resistant
ABS – Strong, industrial-grade, but can degrade in sunlight
PETG – Weather-resistant but slightly softer than ABS
PLA – Brittle and weakest among them What is the correct structure?
Nylon → ABS → PETG → PLA
A student is researching plastic and composite filaments for a school project. They find the following statements:
PLA is biodegradable and easy to print.
Carbon Fiber-Filled PLA is stronger and stiffer than regular PLA.
PETG is weather-resistant and flexible.
Wood-Filled PLA contains real wood fibers for a wooden texture. Which statements describe composite filaments?
A. Statements 2 and 4, because both describe filaments that have added materials beyond plastic.
B. Statements 1 and 3, because they describe commonly used plastic filaments such as PLA material.
C. Statements 1 and 2, because PLA is a widely used material in 3D printing which common to any product.
D. Statements 3 and 4, because they both mention materials used for decorations and shown application of 3D design.
A. Statements 2 and 4, because both describe filaments that have added materials beyond plastic.
A company is conducting a survey to improve 3D printing services. The survey includes the following question: "Which factors are most important when choosing a 3D printer?" A student filling out the survey is unsure how to answer. Which of the following is the best response?
A. Print quality, material compatibility, and cost are key factors when selecting a 3D printer.
B. The color, size, and appearance of the 3D printer matter most when making a selection.
C. All 3D printers’ function in the same way, so the choice does not really matter much.
D. It is best to choose any 3D printer quickly and avoid thinking too much about the options.
A. Print quality, material compatibility, and cost are key factors when selecting a 3D printer
A troubleshooting guide includes the following statements about the extruder:
Statement A: The extruder feeds filament into the hot end for melting. Statement
B: The extruder can either be directly mounted onto the printer or connected through a tube.
Statement C: Some extruders have a red or blue casing. Statement
D: The extruder is usually located near the top of the printer. Which of the statements are relevant when explaining the function of the extruder?
A. Statement A and Statement B
A student faces an issue where a 3D model is not appearing correctly in Creality Cloud after exporting as an STL file. They remember that incorrect model scaling caused a similar issue in another project. How can they generalize this problem?
A. STL files are not compatible with Creality Cloud and should be avoided.
B. Every slicer requires a different file format instead of STL.
C. Exporting in a different color will fix the scaling issue.
D. Incorrect scaling settings can cause STL models to appear too small or too large in any slicer.
D. Incorrect scaling settings can cause STL models to appear too small or too large in any slicer.
A student claims that ABS is the best filament for outdoor applications. Which piece of evidence supports this argument?
A. TPU is utilized for applications requiring high flexibility, but poor rigidity.
B. PETG provides superior flexibility compared to ABS, but lower heat resistance.
C. ABS is resistant to heat and UV exposure, making it durable outdoors.
D. ABS is derived from cornstarch, which makes it biodegradable and easy to print.
C. ABS is resistant to heat and UV exposure, making it durable outdoors.
Which filament is considered a specialized type due to its unique material blend?
A. TPE, since there is rubber embed to it.
B. Wood-PLA, since it contains wood fibers.
C. ABS, since it is used and made up of plastic parts.
D. PLA, since it is mostly biodegradable and made of cornstarch.
B. Wood-PLA, since it contains wood fibers.
A user manual describes the cooling fan in a 3D printer. Which statement correctly explains its function using only relevant information?
A. Cooling fans are often black and make a humming noise during operation.
B. Some cooling fans are larger than others, depending on the printer model.
C. The cooling fan is a small, round component attached to the printer that help to cool the material.
D. The cooling fan helps solidify layers quickly to improve print quality and prevent warping.
D. The cooling fan helps solidify layers quickly to improve print quality and prevent warping.
During a 3D print, the filament stops extruding, and no material is coming out of the nozzle. The operator checks various parts of the printer. Which component is most likely responsible for this issue?
A. Nozzle, because it may be clogged and preventing filament flow.
B. Cooling Fan, because it cools down the layers too quickly.
C. Build Plate, because it holds the printed object in place.
D. LCD Screen, because it controls the printer’s settings.
A. Nozzle, because it may be clogged and preventing filament flow
A student wants to convert a 3D model into an STL file but is using software that does not support STL export. What is another way to achieve this?
A. Print the model on paper and scan it back into the computer and use another software to convert it into STL.
B. Save the file in a music format (MP3) and rename it to STL and use another software to convert it into STL.
C. Export the model in a supported format (such as OBJ) and use another software to convert it into STL.
D. Reduce the model’s height to make it compatible with STL and use another software to convert it into STL.
C. Export the model in a supported format (such as OBJ) and use another software to convert it into STL.
A student is preparing a 3D printing project and needs to select the right filament step by step.
1. Identify the purpose of the print (e.g., flexible, strong, or aesthetic).
2. Compare filament properties (e.g., PLA is easy to print, TPU is flexible, Nylon is strong).
3. Check environmental factors (e.g., heat resistance, moisture absorption).
4. Choose the filament that best fits the needs of the project. What is the correct sequence of actions to ensure the best filament choice?
1 → 2 → 3 → 4
A research team tests different printing methods and records these results:
SLA: Highly detailed, smooth surfaces, requires post-curing
SLS: Strong, durable prints, no supports needed
FDM: Fast, affordable, but rougher finish Based on this data, which conclusion correctly links a printing method to its properties?
A. SLA is best for industrial parts because it is stronger than SLS and FDM.
B. FDM is superior to all methods since it is the fastest printing process.
C. SLA and FDM produce equally strong parts, making them interchangeable.
D. SLS is ideal for functional parts because it produces strong, support-free prints.
D. SLS is ideal for functional parts because it produces strong, support-free prints.
A student is sorting parts of a 3D printer into three categories: mechanical, electronic, and software components. Which of the following is correctly classified?
A. Filament spool – Electronic component
B. Firmware – Mechanical component
C. Power supply – Software component
D. Stepper motor – Mechanical component
D. Stepper motor – Mechanical component
What is the correct order of operations when printing an object on a 3D printer?
A. Start print → Load filament → Heat extruder → Cool and remove object
B. Load filament → Heat extruder → Start print → Cool and remove object
C. Heat extruder → Start print → Load filament → Cool and remove object
D. Load filament → Start print → Heat extruder → Remove object before cooling
B. Load filament → Heat extruder → Start print → Cool and remove object
A 3D printer operator must choose the correct nozzle size for printing durable objects. Which association is correct?
A. A small nozzle makes strong parts, while a big nozzle prints fine detail.
B. Thick filaments always need small nozzles, while thin ones need big nozzles.
C. Nozzle size has no effect, as all filaments work with any nozzle.
D. A large nozzle prints faster, while a small nozzle makes detailed parts.
D. A large nozzle prints faster, while a small nozzle makes detailed parts.
A manufacturer wants to produce medical prosthetics that require flexibility and durability. What conclusion can be drawn from the evidence?
A. PLA is a good choice because it is derived from cornstarch, which makes it biodegradable and relatively easy to print with.
B. ABS is a best choice because it is known for its high rigidity and strong impact resistance, nor for flexibility needed in prosthetics.
C. TPE is the best choice because its elastomeric qualities provide rubber-like flexibility and the needed long-term durability for medical uses
D. Nylon is a useful choice because it is typically utilized for creating mechanical gears and durable parts, but flexible.
C. TPE is the best choice because its elastomeric qualities provide rubber-like flexibility and the needed long-term durability for medical uses
A 3D printing company wants to print functional gears that must be strong and wearresistant. They consider the following information about two filaments:
ABS is impact-resistant, smooth, and used in mechanical parts.
Nylon is wear-resistant, strong, and flexible but absorbs moisture.
Wood-Filled PLA is decorative and biodegradable.
Metal-Filled PLA is heavy and used for aesthetic metal-like prints. Which filament is most relevant for functional gears?
A. Metal-Filled PLA, because it is heavy and gives prints a premium feel.
B. Wood-Filled PLA, because it provides an aesthetic wooden texture.
C. ABS, because it is used in mechanical parts, while Nylon absorbs moisture.
D. Nylon, because it is wear-resistant and strong, while ABS is only impact-resistant.
D. Nylon, because it is wear-resistant and strong, while ABS is only impact-resistant.