Drawing Problems - Chapter 2 44 AutoCAD and Its Applications—Advanced Copyright Goodheart-Willcox Co., Inc. 8. What type of entity does the HELIX command create and how can it be used to create a solid model? 9. What is a composite solid? 10. Which types of mathematical calculations are used in the construction of composite solids? 11. How are two or more solids combined to make a composite solid? 12. What is the function of the INTERSECT command? 13. How does the INTERFERE command differ from INTERSECT and UNION? 14. What is a region? 15. How can a 2D section view be converted to a 3D solid model? Drawing Problems Draw the objects in the following problems using the appropriate solid primitive commands and Boolean operations. When necessary, determine thickness dimensions for parts or use dimen- sions specified by your instructor. If appropriate, apply geometric constraints to the base 2D drawing. Do not add dimensions to the models. Save the drawings as P2-(problem number). Display and plot the problems as indicated by your instructor. 1. General 2. General