28. Give another name for passive VR and describe its function.
29. Briefly describe the function of a head-mounted display (HMD) in a VR system.
30. Briefly describe the Cave Automatic Virtual Environment (CAVE).
31. What is a haptic interface?
32. Define layers.
33. List at least four ways you can use layers to increase productivity and add value to a drawing.
34. What is a symbol library?
35. Define scale factor.
36. Define exporting.
37. Define polygonal modeling.
38. Define spline.
39. Briefly describe direct surface modeling.
40. Give the basic process of feature-based solid modeling.
41. Describe explicit modeling and include the term direct solid modeling in your description.
42. Define parameters.
43. Define and give another name for geometric constraints.
44. Briefly describe dimensional constraints.
45. Discuss the difference between under-constrained, fully constrained, and over-constrained.
46. Describe and give another name for catalog feature.
47. Describe the function of parameter-driven assemblies and include adaptive parts terminology in the description.
48. Name the standard developed by a group of agencies, including the CADD/GIS Technology Center (CGTC), the American Institute of Architects (AIA), the Construction Specifications Institute (CSI), the United States Coast Guard, the Sheet Metal and Air Conditioning Contractors National Association (SMACNA), and the National Institute of Building Sciences (NIBS).
49. Briefly describe the purpose of the standard identified in the previous question, and give at least two components.
Select one or more of the following problem topic areas as determined by your instructor or course guidelines and write a 300- to 500-word written and oral report on the selected topic or topics. Prepare each report using a computer. Use double spacing, proper grammar and spelling, and illustrative examples where appropriate. Use, but do not copy, the information found in this chapter and additional research information.
Part 1: Problems 3.1 Through 3.25
Problem 3.1 Use of CADD in the engineering design process.
Problem 3.2 CADD workstation and computer equipment.
Problem 3.3 Specific CADD software product.
Problem 3.4 Two-dimensional CADD applications.
Problem 3.5 Three-dimensional surface model applications.
Problem 3.6 Three-dimensional solid model applications.
Problem 3.7 Product life cycle management (PLM) software.
Problem 3.8 Web-based design and drafting collaboration.
Problem 3.9 Digital prototyping of a specific product or as used by a specific company.
Problem 3.10 Rapid prototyping (RP) applications.
Problem 3.11 Rapid injection molding of a specific product or as used by a specific company.
Problem 3.12 Subtractive rapid prototyping of a specific product or as used by a specific company.
Problem 3.13 Computer-aided engineering applications.
Problem 3.14 Animation used in the design of a specific product or as used by a specific engineering company.
Problem 3.15 Computer-aided manufacturing (CAM) applications.
Problem 3.16 Computer-integrated manufacturing (CIM) of a specific product or as used by a specific engineering company.
Problem 3.17 CADD related to technical illustration.
Problem 3.18 Virtual reality (VR) in engineering drawing and design.
Problem 3.19 Operation and techniques associated with a specific CADD software.
Problem 3.20 Surface modeling of a specific product or as used by a specific engineering company.
Problem 3.21 Solid modeling of a specific product or as used by a specific engineering company.
Problem 3.22 ASME Y14.41 CADD standard.
Problem 3.23 United States National CAD Standard (NCS).
Problem 3.26 Draw the following sheet metal part using CADD software. Use the entry method of your choice. Space is provided in which you can write the coordinate values needed to draw a line to each point—or use a separate sheet.
B to C
C to D
D to E
E to F
F to G
G to A
Problem 3.27 The following property plat has been given to you in the form of a sketch with included angles. You are to draw the property plat full size using the dimensions given. Do not use decimal values for angles or distances. Space is provided in which you can write the coordinate values needed to draw a line to each point. Write your answers using a polar coordinate notation. For example, a line 87'-3" long, at an