Chapter Tests
and Problems
ChaPTer 19 PreCision sheeT
MeTal DrafTing TesT
INSTRUCTIONS
Answer the questions with short, complete statements or draw–
ings as needed.
QUESTIONS
1. Briefly discuss how the term precision sheet metal drafting
is used in this chapter is different from the term associated
with sheet metal parts used in construction applications.
2. What specific material does the term sheet metal represent?
3. Describe how plate material is different from sheet metal.
4. Describe sheet metal parts.
5. Define flat pattern.
6. How can phantom line be used to represent a flat pattern on
a drawing?
7. Describe a drawing showing only the flat pattern using rect-
angular coordinate dimensioning without dimension lines
and tabular feature.
8. Describe the following precision sheet metal applications:
tables, the use of a hole table, bend table, and a drawing
showing a flat pattern with manufacturing information ex–
tracted to a table.
9. Give an example of bend instructions that mean bend up
908 with a .120 bend radius.
10. Define the bend tangent line and describe how it is drawn.
11. Define the centerline of bend and describe how it is drawn.
12. Describe how the inside mold line is drawn.
13. Describe how the outside mold line is drawn.
14. Define bend allowance.
15. What is the purpose of a bend allowance calculation?
16. Define neutral axis.
17. Typically, where is the neutral axis?
18. Define the K-factor.
19. Describe bend transition.
20. What are bend facets and when are they used?
21. Give the purpose of bend relief.
22. How is corner relief used?
23. Define flange.
24. Describe the characteristics of a typical miter joint.
25. Define seam.
26. Define hem.
27. When are hems necessary?
28. What is a roll form?
29. When is a roll form used?
30. Define lancing.
31. Define blanking.
32. What is a stamping press?
33. Describe nesting blanks.
34. Name the three dimensioning practices that are commonly
used for precision sheet metal drafting applications.
35. Describe undimensioned drawings.
36. Give the basic function of grid lines.
37. Describe dimensional accuracy points.
38. How are registration marks used in the place of grid lines?
39. How many registration marks are used and what is their
orientation?
40. Show the media note that should be placed on all undimen-
sioned drawings.
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Chapter 19
Precision Sheet Metal Drafting
Answers to End-of-Chapter Test Questions
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