Machine Trades Print Reading iii Preface Preface Machine Trades Print Reading is designed to help student’s develop the basic skills required for visualizing and interpreting industrial prints. Each unit begins with outcome-based Learning Objectives the student must achieve and Key Terms the student must learn to demonstrate satisfactory completion of the unit. These competencies are statements describing the knowledge, skills, and attitudes students should exhibit and language they should be familiar with to succeed in a career in industry. Competencies defi ne the learning outcome, but need not include the conditions and criteria for acceptable performance. A heavy emphasis has been placed on the use of illustrations to develop the basic skills of visualization and to simplify the learning process. Actual industrial prints are featured to prepare students for the real conditions found in industry. Some of the industrial prints have certain changes or modifi cations from the original drawings to provide a variety of information that will aid students’ learning experiences. The text consists of 18 units. The fi rst four units give the basics of print reading. They present the important concepts of applications of drawings and prints in industry, visualizing shapes, line usage on drawings, and basic title block format. Units 5 and 6 provide a review of basic math and measurement skills that are necessary to successfully read and interpret prints and work in industry. Units 7 through 17 deal with industrial prints. Each unit deals with a specifi c technical topic, which is fi rst introduced in the text and then shown on the actual prints. A unit on geometric dimensioning and tolerancing (GD&T) has been included due to the widespread use of this system by the manufacturing industry. The instructional materials, illustrations, and industrial prints in Machine Trades Print Reading are presented in a step-by-step sequence. The written material and illustrations in each unit contain the technical information needed to complete the industrial print reading activities. Each succeeding unit contains additional new material. Review questions pertaining to the industrial prints in each unit use the new material as well as material learned from earlier units. Unit 18 is a collection of prints and activities which review all of the material presented in the text. The reference section includes various charts, tables, and other information that will prove useful to novice and expert print readers alike. The glossary includes defi nitions of every Key Term presented in the text. The reference section and glossary will also serve as valuable resources for students even after completion of this text. Michael Barsamian Richard Gizelbach