38 Geometric Dimensioning and Tolerancing Copyright Goodheart-Willcox Co., Inc. 23. Identify two terms that refer to the dimensioning, tolerancing, and annotating of 3D models in a model-based design environment. _ _____________________________________________________________________________ _ _____________________________________________________________________________ 24. Identify the term that refers to a set of model documentation used to define the physical and functional requirements of a product. _ _____________________________________________________________________________ 25. What is the name of the manufacturing method that uses computer-controlled machine tools to automate manufacturing processes? _ _____________________________________________________________________________ Critical Thinking Answer the following questions using the information provided in this chapter. 1. Explain why dimensions were not considered necessary on early engineering drawings. What technological developments and historical events called attention to the need for accurately dimensioned drawings? _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ 2. Standardization of symbols has been a major focus in standards development. How does the application of symbols on engineering drawings improve clarity and make drawings more efficient? _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________ _ _____________________________________________________________________________