January 2021

1. Which building trades use developments and intersections? 2. What is the purpose of revolution? 3. What is the axis of revolution? What determines where the axis is drawn? 4. What are successive revolutions? 5. Parent-child relationships are important for assemblies built using a constraint-based modeler. What problems might occur, and how could you prevent […]

 1. Define the differences between a static assembly and a dynamic assembly. Which method would offer advantages to design teams who access a common database of files through a network?  2. Many of the recent generation of computer modeling programs have capabilities for solid modeling and constraint-based modeling. Research the capabilities of the CAD program,

1. Although 3D modeling can describe part and assembly configuration in accurate detail, many parts or features are rarely included in a model until very late in the process if included at all. List four parts or features that fall into this category, and give reasons for omitting detail.  2. Component models of detail parts

Material changes are common in the development phase of engineered parts. Consider a component part modeled first using 6061-T6 Aluminum, and then with 1020 Steel. No dimensional changes are made. Do each of the following properties of a solid change with changing material? How? a. Volume b. Mass c. Density d. Centroid e. Moment of

1. In a schematic diagram, what does a large dot mean when two lines cross? 2. How are a component’s terminal pins identified in a schematic diagram? 3. Draw the representation of a wire that stops and then continues at a different location. 4. What type of electronic drawing shows parts in three dimensions?  5.

1. Material changes are common in the development phase of engineered parts. Consider a component part modeled first using 6061-T6 Aluminum, and then with 1020 Steel. No dimensional changes are made. Do each of the following properties of a solid change with changing material? How? a. Volume b. Mass c. Density d. Centroid  e. Moment

 1. Define the steps involved in creating a stereolithographic rapid prototype part from a solid model. What are some of the considerations when deciding whether a CAD model is a good candidate for prototyping using stereolithography? 2. Give a brief explanation of the physical process used to create rapid prototype parts by each of the

1. How does rapid tooling differ from rapid prototyping? In what situations might either method be used to create actual working components rather than just shape-representative models? 2. What do the two numbers of a limit dimension mean? 3. Draw three different geometric tolerances that reference a datum. Label the information in each box. 4.

1. Give an example of two parts that would require a running and sliding fit. A force fit. 2. List five classes of fit. 3. Can one part have an allowance? Why? 4. Can two parts have a tolerance? Why? 5. Give an example of how GDT could be used as both a design and

Draw an isometric sketch of a cube and label the six degrees of freedom its motion can exhibit. List the five steps required to apply GDT to the design process. Draw a typical screw thread using detailed representation, and label the parts of the thread. Why are phantom lines used to represent the middle part