51 Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website. Unit 5 After completing Unit 5, you will be able to: ❍ Identify and explain the significance of the principal views on a multi- view drawing. ❍ Recognize and explain uses of an auxiliary view and the principal view from which it is projected. ❍ Explain how the major types of section views are read and used on a print. ❍ Identify methods to read prints. Key Words auxiliary view broken-out section conventional breaks crosshatching cutting-plane line first angle projection full section half section multiview drawings offset section orthographic projection partial auxiliary view principal views removed section revolved section section lining sectional view thin section third angle projection title block A print shows a series of views that give the welder an exact shape and size description of an object, Figure 5-1. Additional information necessary to make or assemble the product is also included on the print. The best way to read a print is to mentally break it into smaller parts. First, try to look at the shape of the part with the dimensions and notes removed. Second, try to determine the overall size of the part so you have some under- standing of how big or small the part is. Third, look at the title block for infor- mation about the title part, material, scale, tolerance requirements, and other general pieces of information. Finally, read all of the notes on the drawing. Multiviews Most prints are in the form of multiviews. Multiview drawings are needed when more than one view is required to give an accurate shape description of the object. On most prints, the object is drawn in the operating position. The views are arranged on the print in a systematic manner accepted as standard throughout industry. For example, in Figure 5-1 the top view appears above the front view. The right side view appears to the right of the front view. Understanding Prints Select the icons to access Drill and Practice activities. Ch05.indd 51 4/25/2019 1:32:25 PM