Drawing Problems - Chapter 2 4 754 AutoCAD and Its Applications—Basics Copyright Goodheart-Willcox Co., Inc. ▼ Advanced Problems 8–12 present engineering sketches of schematic drawings. The drawings are not to scale. Prepare a formal drawing from each sketch using symbols. Create the symbols first as blocks or wblocks and then save the symbols in a symbol library using one of the methods described in this chapter. 8. Electronics Draw the logic diagram of a portion of the internal components of a computer from the sketch shown. Save the drawing as P24-8. 9. Piping Draw the piping flow diagram of a cooling water system from the sketch shown. Look closely at this drawing before you begin. Draw the thick flow lines with polylines. Save the drawing as P24-9.