Additive Test Questions Full Spring 2024

True or False: When printing from directly inside SOLIDWORKS, you can scale the part without having to add a feature to the part model.

True

What are the different ways you can send a file to a printer>

Over a WiFi network and using a USB thumbdrive

Scaling down a mating part will achieve what?

Make it easier to mate that part to another because of the slightly smaller scale.

True or False: Increasing the quality of the finished part will take the machine longer to print it.

True

If a part is too big to print in a machine, what is the best option to be able to print it?

Cut the model into smaller parts and print them, then glue them together once they are all complete.

True or False: Adding more triangles to an STL file will make the final part finish better.

True

True or False: Increasing the number of triangles on an STL file will decrease the overall print time.

True

True or False: Round holes in part that are perpendicular to the build plate typically do not need support material in them to ensure proper printing.

False

The 3D printing process in which a strand of melted material is pushed through a heated nozzle is known as:

FDM

The use of bad adhesion materials in FDM printing can help parts stick to the plate during printing. What are two common adhesion materials used?

Blue painter’s tape and hairspray

True or False: FDM printers are only capable of printing PLA material.

False

The ultimaker machine featured in the videos utilizes a second nozzle that prints supports in PVA. What is the benefit of this type of procedure?

PVA is water solluable so the supports can easily be removed.

To ensure the proper adheasion of layers in the FDM process, it’s best to monitor the print at what point?

The first 3-5 layers.

If you need a part that can be subjected to higher temperatures, what type of FDM material is recommended?

ABS

When printing in ABS, what chemical can be used to smooth the surface?

Acetone

What is the most commonly used nozzle size in FDM printers?

.4mm

True or False: PLA material gives off an odor that is not pleasant to most people.

False

What considerations should be taken when storing unused PLA material?

They should be stored in a dry area.

When using PVA as a support material, what is the best way to remove it from the finished part?

In a tank of tap water that has a moving flow.

What is the benefit of having a heated build platform in an FDM printer?

To keep the part form cooling too fast and warping.

When loading material into an FDM printer, its best to let a little of the material run out of the nozzle for what reasons?

To make sure the feeder is working correctly, it’s flowing correctly, and that the previous material/color is gone.

The 3D printing process that uses a laser to harden liquid resin is known as

SLA

In the SLA process, the resin is cured by what type of laser?

A UV laser

The resin used in an SLA printer is sensitive to what type of light?

UV

True or False: when printing a hollow part on an SLA machine, it is important to ensure there is a drain hole at the bottom of the part based on its printing orientation.

True

True or False: parts printed in a UV resin need to be a post cured.

True

True or False: Parts printed in a UV resin can be cured by placing them out in direct sunlight.

True, but the use of a UV oven will speed the process.

Prints from an SLA resin printer should be washed in a bath of what chemical to rinse away excess resin?

Alcohol

True or False: Once a part has completed, the remaining resin in the tank should be discarded because it has been used.

False

A common feature of 3D printing slicer programs is one that helps a part stick to the build plate. What is this feature called?

Raft

As a general rule, when the overhang of a parts geometry exceeds a certain angle, the use of what type of feature should be used to achieve a good print?

Support

True or False: cura from ultimaker allows for the direct import of native SOLIDWORKS files, removing the need to export to a neutral format.

True

The creation of advanced part structures is aided by what type of CAD design tool>

Generative Design

In partnership with 3D systems, SOLIDWORKS features an add-in that among many features allows you to print an assembly file in one piece. What is this tool called?

3DXpert

True or False: Clearance must be modeled in at the CAD level in order for parts to fit together

False, you can scale the part in the slicer software in order to maintain design intent at the CAD level.