Drawing Problems - Chapter 10 Copyright Goodheart-Willcox Co., Inc. Chapter 10 Advanced Surface Modeling 265 13. How do you create a new solid when using the SURFOFFSET command? 14. What are the two creation type options available when using the SURFEXTEND command? What is the purpose of each option? 15. What are the three object types that can be used as cutting objects when trimming a surface? 16. What are the two basic ways to create a NURBS surface? 17. What command is used to display control vertices on a NURBS surface? 18. What command can be used to convert a 2D line or polyline into a surface model? 19. What is the purpose of the THICKEN command and which type of object does it create? 20. What is the preferred command to convert a watertight series of surfaces into a solid? 21. Name three objects you can use to extract isoline curves when using the SURFEXTRACTCURVE command. 22. What is the default direction used for extracting isoline curves with the SURFEXTRACTCURVE command? Drawing Problems 1. General Create a loft surface from the three cross sections shown. The spacing between cross sections is 5 units. The circle cross section is a ∅6 circle. Use your own coordinates for the circle center point and the ellipse center points. To draw the two ellipse cross sections, refer to the dimensions given. The ellipses are centered on the same center point along the Z axis (refer to the top view). The major axis of the top ellipse is parallel to the minor axis of the lower ellipse. Use your own orientation for the ellipse axes relative to the circle (the exact orientation is not important). When creating the loft, create a procedural surface with asso- ciativity. After creating the loft, edit it by changing the dimensions of the ellipse cross sections. Refer to the dimensions given. Save the drawing as P10-1. Top View Ellipse A Ellipse B Circle Circle Ellipse A Ellipse B Loft A Loft B Cross Section Dimensions (Loft A) Edited Dimensions (Loft B) Ellipse A Major diameter = 3.80 Minor diameter = 2.70 Major diameter = 3.00 Minor diameter = 2.00 Ellipse B Major diameter = 2.70 Minor diameter = 2.30 Major diameter = 6.00 Minor diameter = 4.00