Geometric Dimensioning.DOC

Geometric Dimensioningand Tolerancingfor Mechanical Design Answer Guide (Answers to the questions and problems at the end of each chapter) Chapter 1 Introduction to Geometric Dimensioning and Tolerancing Chapter Review Page 7 Geometric Dimensioning and Tolerancing is a symbolic language used to specify the size , shape , form , orientation, and location of features on a part. 2. Features toleranced with GDT reflect the actual relationship between mating parts. 3. Geometric Dimensioning and Tolerancing was designed to insure the proper assembly of mating parts , to improve quality , and reduce cost . 4. Geometric tolerancing allows the maximum available tolerance and, consequently, the most economical parts. 5. ASME Y14.5–2009 is the current, authoritative reference document that specifies the proper application of GDT. 6. Plus or minus tolerancing generates a rectangular -shaped tolerance zone. 7. GDT generates a cylindrical-shaped tolerance zone to control an axis. 8. If the distance across a square tolerance zone is ± .005 or a total of .010, what is the approximate distance across the diagonal? ± .007 or .014 9. Bonus tolerance equals the difference between the actual mating envelope size and the maximum material condition . 10. While processing, a rectangular part usually rests against a datum reference frame consisting of three mutually perpendicular planes. Chapter 2 Dimensioning and Tolerancing Fundamentals Chapter Review Page 15 1. Each dimension shall have a tolerance except those dimensions specifically identified as reference, maximum, minimum, or stock. 2. Dimensioning and tolerancing must be complete so there is a full understanding of the characteristics of each feature. 3. Dimensions shall not be subject to more than one interpretation . 4. The drawing should define the part without