1.6: Review Questions

1 .

The Four Building Blocks of AM are:

1. Layer formation, Energy, Materials and Printers
2. Machines, Materials, Digital, People
3. Machines, Materials, DfAM, Innovation
4. 3D printers, materials, design, people

2 .

When referring to Machines within the Four Building Blocks, we refer to the 3D printers

1. True
2. False

3 .

AM thinking is a key element of which Building Block?

1. Machines
2. Materials
3. Digital
4. People

4 .

True or False, polymers have been used in AM longer than metals and are more mature

1. True
2. False

5 .

Which statement is most correct?

1. All of the AM processes that can be invented, have been
2. AM is limited to non critical applications and consumer goods
3. Management and the organization of people is essential to be successful in AM
4. DfAM is another term for lattice structures and designs that cannot be made conventionally

6 .

The best time to start thinking about using AM is

1. At the concept stage
2. To make spare parts
3. When all other good options have been exhausted
4. With a big budget

7 .

The 3 dimensional data to make a 3D printed part comes from

1. Computer Aided Design (CAD) files
2. 3D scanner
3. MRI or CT scans
4. All of the above

8 .

Which of these statements is most true about the STL file format?

1. It can only describe the surface geometry of a 3 dimensional object
2. It is in metric units
3. It is used by the designer to designate features like color and material
4. It is interchangeable with CAD

9 .

Which of these statements is applicable to the build file?

1. It can be a single part or multiple parts
2. Controlling the build file is important to ensure consistent results
3. It is similar to a manufacturing drawing
4. All of these statements are applicable

10 .

Which is not a component of the Digital Workflow?

1. 3D model
2. Copy/Paste of CAD for management briefings
3. DfAM
4. The Build file

11 .

Which is the least commonality of all AM processes?

1. A layer by layer approach
2. Use of powders
3. They can be described with describing the layer, energy and material
4. Starting at the design concept phase

12 .

Which is not a question used to define any AM process?

1. How is the layer created?
2. How is the energy applied?
3. How is the DfAM applied?
4. How is the material applied?

13 .

The material in Binder Jetting is applied by which statement?

1. As a glue via the print head
2. As a powder in a bed
3. As a wire or filament
4. As a sheet

14 .

The material in Directed Energy Deposition is applied by which statement?

1. As a sheet
2. As a powder in a bed
3. As a wire or filament
4. As a powder or filament

15 .

This statement is true of which AM process? The layer is created by spreading a layer of powder in a bed.

1. Powder Bed Fusion
2. Binder Jetting
3. Material Jetting
4. A and B

16 .

Which AM process is least compatible with metals?

1. Vat Photopolymerization
2. Material Extrusion
3. Binder Jetting
4. Material Jetting

17 .

The AM Maturity Model describes an approach to match product requirements and the skills needed to meet them in what way?

1. Go for the biggest return on investment
2. Print any part, any time, anywhere
3. A risk adjusted path to spend money
4. A risk adjusted path for learning as product requirements get tougher

18 .

In which of the following processes would you expect to find a high-energy laser?

1. A Directed Energy Deposition system using 100% titanium wire
2. A Binder Jet system with 98% steel powder and 2% plastic
3. A Material Extrusion system with 60% steel powder and 40% plastic

19 .

Which of the following is an example of a Level 2 design?

1. A clip made via Material Extrusion to test a new design of a prosthetic leg
2. Spare parts for a railroad car that are out of production
3. A fully designed for AM hydraulic manifold that has a reduced part count
4. A rocket nozzle that has internal passages to cool and reduced part count which improve performance

20 .

Which statement is most true when considering the TBGA AM Maturity Model?

1. Contemplating the use of both directly manufactured parts as well as tooling to make parts
2. Mimicking a current part is a good example of a Level 4 design
3. Level 4 is where the most value is and the where efforts should begin
4. It is methodology for an organization to match its product requirements to its competitors

21 .

The Project Management Triple Constraint is

1. Schedule, Scope and Labor
2. Cost, Scope and Value
3. Schedule, Scope and Cost
4. Performance, Schedule and Budget

22 .

Which was not discussed as a use case for employing AM?

1. Speed – AM improves time to market
2. Complexity – Design freedoms allow for complex designs
3. Durability – Consolidating parts eliminates joints
4. Cost – Use AM to apply pressure on current vendors

23 .

True or False: When choosing an AM process, only technical requirements are used.

1. True
2. False

24 .

Which of the following is not a good example as an important consideration on how to choose an AM process?

1. The surface finish attainable
2. The part must be made from Ti 6Al4V
3. The company owns a Powder Bed Fusion machine
4. The annual demand is 865 parts a year

25 .

Of the AM process types discussed, which of the following is the best list of those that use powder in any way as a feedstock?

1. Powder Bed Fusion, Binder Jet Processing, Directed Energy Deposition, Material Extrusion, Material Jetting
2. Powder Bed Fusion, Binder Jet Processing, Directed Energy Deposition, Material Extrusion, Vat Photopolymerization
3. Powder Bed Fusion, Binder Jet Processing, Directed Energy Deposition
4. Powder Bed Fusion, Binder Jet Processing, Directed Energy Deposition, Material Extrusion, Vat Photopolymerization, Material Jetting, Sheet Lamination

26 .

Materials Engineers are important team players in AM because they can contribute to which of the following?

1. Assessing the impact of property anisotropy, or if printed parts will exhibit different properties in the build or vertical direction
2. Applying materials science as to whether a polymer material can be used in Material Extrusion
3. Assessing the necessity of post build processing to meet requirements
4. All of the above

27 .

Design Engineers are an important AM team player as they contribute to which of the following?

1. Cost through minimizing print time with efficient designs
2. Cost by taking into account post processing up front
3. Cost and performance by optimizing build file
4. All of the above

28 .

What differentiates Material Extrusion from the other AM processes?

1. Can be plastic or metallic
2. The material is deposited through layers in the X and Y direction
3. The material is extruded through a nozzle, die, or orifice
4. All of the above

29 .

Which is a true statement?

1. All AM processes are about the same level of maturity
2. There is one AM process that will ultimately be chosen as the best
3. AM is dynamic and growing rapidly
4. AM will replace most of manufacturing in the next 20 years