Drafting Zone

ASME's Y14.5 is far and away the most technically involved and hardest to understand drawing standard. The Geometric Dimensioning and Tolerancing Study Zone offers an assortment of GD&T reference and study tools that will help any organization more accurately apply Y14.5 to the engineering drawings it creates and interprets. Also check out our Shopping Zone for GD&T Posters, the world's best GD&T Glossary, and other references that help improve GD&T comprehension.

Dimensioning & Tolerancing Study Guides Each Study Guide interprets a major technical area of the ASME Y14.5 standard and includes Study Questions that help you to assess your knowledge of that area.
Datums Form, Orientation, Profile, and Runout General Dimension Application	General Tolerances Position, Concentricity & Symmetry Symbols	Verifying Dimensional Requirements

Dimensioning & Tolerancing Practice Exams

Use these dynamic Practice Exams to assess your overall level of knowledge of Geometric Dimensioning & Tolerancing and to determine which technical areas of GD&T you need additional training on. The Practice Exams can also be used prepare for the ASME GDTP Certification Exam for the Technologist level.

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Full-Length Practice Exam

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Dimensioning & Tolerancing Checkups

Dimensioning Checkup

Review your knowledge of dimensioning principles by examining a drawing and identifying drafting errors

GD&T Glossary Lookup - NEW

GD&T Symbols

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