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Drawing Interpretation (GD&T)

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Understand basic mechanical two-dimensional engineering drawings, drawing elements, part and section views, dimensions, tolerances, finish and welding symbols.

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Course Access

This Self Study course is designed to be taken at your convenience and on your own schedule. You have 365 days from the time of purchase to finish the course.

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This Self Study course is available on ASME’s Learning Hub, our online learning platform. It covers the majority of information required to understand basic mechanical two-dimensional engineering drawings. Topics covered are:

  • Basic drawing elements (formats, title block, parts list, revision block, etc.)
  • Part views (multiview, auxiliary, and isometric)
  • Section views
  • General dimensions
  • Tolerances
  • Finish and welding symbols.

The course consists of eleven modules, each with a quiz; most also include drawing exercises and supplementary information. Learners will receive downloadable job aids and reference material such as measurement plans, dimensioning symbols and fundamental rules, and real-world part and assembly drawings. 

By participating in the class, you will learn how to successfully:

  • Describe the fundamentals of drawing interpretation
  • Identify drawing elements, including part views and sections
  • Describe general dimensions and tolerances
  • Explain how to present surface texture, fasteners and welding

Who should attend:
Beginning designers, drafters, quality, procurement, tooling, production, manufacturing and shop personnel; more advanced designers, and those involved with tooling, production, inspection, routing in the shop; others involved with purchasing, costing and management; vendors and suppliers.

Supplemental Course Materials (not included with course, purchase separately)
Access to the ASME Y14.5 - 2018 Dimensioning and Tolerancing Standard is strongly recommended for this course. While recommended, the Y14.5 Standard is not included in the purchase of the course. To purchase the Y14.5 Standard, click here.

Course participants are expected to have:

  • Access to computer equipment and a reliable internet connection
  • Software to display PDF files (such as Adobe Reader)

A Certificate of Completion will be issued to participants who successfully complete this course.

This course is included in the following Learning Paths:
ASME Y14.5 Geometric Dimensioning and Tolerancing (GD&T) Fundamentals Learning Path
Y14.5-2018 Dimensioning and Tolerancing (GD&T) Overview, ASME Y14.5-2018 – GD&T Fundamentals (On Demand), Drawing Interpretation (GD&T)
Price if purchased separately: $625
You save: $130
List Price: $495
ASME GD&T Essentials Codes and Courses Package
Y14.5-2018 Dimensioning and Tolerancing (GD&T) Overview, Dimensioning and Tolerancing, Certification of Geometric Dimensioning and Tolerancing Professionals, Engineering Drawing Practices, ASME Y14.5-2018 – GD&T Fundamentals (On Demand), Drawing Interpretation (GD&T)
Price if purchased separately: $1058
You save: $363
List Price: $695

Module 1 – Drawing Interpretation Introduction

  • Introduction
  • Drawing Production
  • Drawing Standards
  • Product Realization
  • Design
  • Tooling/Production
  • Inspection
  • Drawing Types
  • Drawing Life Cycle
  • Quiz 1 – Introduction

Module 2 – Drawing Layout

  • Drawing Layout
  • Title Blocks
  • Revision Block
  • Parts List
  • Notes
  • Conclusion
  • Quiz 2 – Drawing Layout

Module 3 – Orthographic Projection

  • View Projection
  • Surface Types
  • Line Types
  • Multiview Drawing
  • Visualization
  • Conclusion
  • Quiz 3 – Part Views
  • Module 3 Drawing Exercises – Part Views

Module 4 – Auxiliary Views

  • Auxiliary Views
  • Successive Auxiliary Views
  • Partial Views
  • Quiz 4 – Auxiliary Views
  • Module 4 Drawing Exercises – Auxiliary Views

Module 5 – Pictorial Views

  • Pictorial Views
  • Axonometric Projection
  • Oblique Projection
  • Conclusion
  • Quiz 5 – Isometric and Oblique Views
  • Module 5 Drawing Exercises – Iso & Oblique

Module 6 – Section Views

  • Introduction
  • Section Line Patterns
  • Section Types
  • Conventional Practices
  • Conclusion
  • Quiz 6 – Section Views
  • Module 6 Drawing Exercises – Sections

Module 7 – General Dimensioning

  • Dimensioning Introduction
  • Feature Types
  • Dimension Elements
  • Dimension Construction
  • General Dimensions
  • Conclusion
  • Quiz 7 – General Dimensions
  • Module 7 Drawing Exercises – General Dimensioning 

Module 8 – Tolerances

  • Tolerancing Introduction
  • Tolerance Expression
  • Terminology
  • Limits of size
  • Envelope Principle
  • Tolerance Allocation
  • Conclusion
  • Quiz 8 – Tolerances
  • Module 8 Drawing Exercises – Tolerancing 

Module 9 – Surface Texture

  • Introduction
  • Surface Texture Symbols and Characteristics
  • Examples
  • Past Practices
  • New Symbol
  • Quiz 9 – Surface Texture
  • Module 9 Drawing Exercises - Surface Texture

Module 10 – Fasteners

  • Introduction
  • Thread Characteristics
  • Thread Notes
  • Thread Drawing Appearance
  • Pipe Threads
  • Thread Uses
  • Washers
  • Nuts
  • Other Threaded Fastener Factors
  • Keys
  • Splines, Gears and Serrations
  • Pins
  • Rivets
  • Retaining Rings
  • Springs
  • Cams
  • Conclusion
  • Quiz 10 – Fasteners
  • Module 10 Drawing Exercises – Thread Notation 

Module 11 – Welding

  • Introduction
  • Examples
  • Quiz 11 – Welding


  • Appendix A - H213 Standards
  • Appendix B - Measurement Plan
  • Appendix C - Auxiliary Views
  • Appendix D - Dimensioning Symbols
  • Appendix E - Dimensioning Rules
  • Appendix F - Example Drawings
  • Appendix G - Fasteners Standards
Course Developer

Patrick J. McCuistion, Ph.D., GDTPS

Patrick J. McCuistion, Ph.D., GDTPS, was an Associate Professor in the Engineering Technology and Management Department at Ohio University for 25 years. He is active in many committees, including ASME Y14.5 Dimensioning and Tolerancing.

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Self Study

100% online independent learning at your own pace. Learners can enroll and start at any time. Courses are accessible for 365 days.
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