- What the 16-Domain Blueprint Actually Is
- Exam Format and the Numbers That Matter
- Domains 1-3: The Standards Foundation
- Domains 4-7: Geometry and View Construction
- Domains 8-9: Pictorials, Models, and Assemblies
- Domains 10-12: Dimensioning, Tolerancing, and GD&T
- Domains 13-16: Manufacturing Callouts and Specialized Topics
- Sequencing the Domains in Your Prep
- Registration, Fees, and Eligibility
- Frequently Asked Questions
- The ATMAE study guide lists 16 official major content areas for Certified in Engineering Graphics, from ASME standards to specialized topics.
- The current credential page specifies an open-book exam of 142 multiple-choice questions, with two hours allowed per the certification FAQ.
- Passing requires a cumulative score of 70 points or higher, not 70%. Domain percentages are not published.
- Printed references are allowed; Internet resources and software-based references are prohibited during the exam.
What the 16-Domain Blueprint Actually Is
Certified in Engineering Graphics (CEG) is administered by the Association of Technology, Management, and Applied Engineering (ATMAE). Its scope comes from the Study Guide for the Certified in Engineering Graphics Certification Exam (linked file revision 2.1.21), which lays out 16 major content areas under the heading "Content for ATMAE Certified Engineering Graphics (CEG) Certification Exam." Those 16 headings are the official exam objectives. Nothing on this page is an invented prep category.
Two caveats shape how you should read the blueprint:
- No published weights. ATMAE does not publish percentage weightings for the 16 areas. Any site that hands you a neat pie chart of domain percentages is guessing. Treat all 16 as examinable and budget your time by your own weaknesses.
- Standards editions named in the guide. The guide references specific standards editions. Check the study guide itself for the editions it names, and do not assume a newer edition from another source is what the exam expects.
If you are new to the credential, the primer on what CEG certification is covers the basics before you dig into the domains below. For the full preparation plan, see the CEG study guide.
Exam Format and the Numbers That Matter
The current credential page describes a 142-question multiple-choice exam, and the current certification FAQ allows two hours. The study guide's linked file is older: its prose mentions 145 questions in two hours, and the question allocations listed beside its content areas add up to 160. Those legacy figures conflict with each other and with the current page, so do not treat either as the present exam length. Plan around 142 questions in two hours, and confirm on the ATMAE credential page when you register.
| Feature | What CERT sources say |
|---|---|
| Administering body | ATMAE |
| Question format | Multiple choice |
| Question count | 142 (current credential page) |
| Time allowed | Two hours (current certification FAQ) |
| Open book? | Yes, printed reference materials permitted |
| Prohibited | Internet resources and software-based references |
| Delivery | Online with an approved proctor (per the linked study guide) |
| Passing standard | Cumulative score of 70 points or higher, not 70% |
The "70 points, not 70%" wording matters. It means you should not convert your practice-test percentages directly into a pass prediction. For a deeper look at how the threshold works, read CEG passing score, and for realistic difficulty expectations see how hard the CEG exam is.
Domains 1-3: The Standards Foundation
The first three domains are the vocabulary and paperwork layer of engineering graphics. They look easy, but they contain precise, memorizable details that are straightforward points if you prepare and painful misses if you skim.
Domain 1: ASME Standards, Terms, and Line Conventions
This is the language of the drawing. Expect questions that ask you to identify the right line type for a given purpose and recognize standard terminology.
- Visible, hidden, center, phantom, section, cutting-plane, break, and dimension/extension line conventions
- Relative line weights and when each line type is appropriate
- Which ASME standards govern which aspects of a drawing
- Correct drafting terminology used consistently in the standards
Domain 2: ASME Standard Sheets, Title Blocks, Revision Blocks, and Part Lists
This domain covers drawing-sheet administration: what goes where and why.
- Standard sheet sizes and their designations
- Title block contents and typical placement
- Revision block purpose and how changes are recorded
- Part list (bill of materials) structure and item-number linkage to the drawing
Domain 3: Units, Measuring Devices, Scaling Issues, and Metric/Inch Conversion
Straight computation and measurement judgment, often the fastest points on the exam.
- Metric and inch conversion, including rounding behavior
- Selecting an appropriate measuring device for a feature and accuracy level
- Scale notation, scale factors, and enlarged versus reduced scales
- Reading and interpreting scales correctly
Domains 4-7: Geometry and View Construction
This block is where spatial reasoning gets tested. If you have drafting or modeling experience, these four domains will feel familiar, but the exam asks for terminology and convention, not just visual instinct.
Domain 4: Geometry Terms, Definitions, and Constructions (2D and 3D)
Expect definitions and construction logic: tangent arcs and lines, polygons, conic sections, and solid-geometry terminology. The 3D side asks you to name and recognize solids and their features. Memorize the precise definitions, because answer choices often differ by one word.
Domain 5: Orthographic Projection Theory, Standard Representation, and Spatial Visualization
This is the conceptual core of the whole credential. You need to understand the glass-box model, the six principal views, first-angle versus third-angle projection and their symbols, and how to choose the minimum set of views that fully describe a part. Spatial-visualization questions typically give you views and ask you to identify a missing line or matching pictorial. Practice by sketching, not just reading.
Domain 6: Sectional View Standards, Terms, and Conventional Practices
Sections are heavy on convention. Know the section types (full, half, offset, broken-out, revolved, removed), when each is used, section-lining patterns, and the well-known exceptions, such as features that are not sectioned even when the cutting plane passes through them. The "conventional practices" in the domain title is a hint: the exam rewards knowing the standard shortcuts, not geometrically pure answers.
Domain 7: Auxiliary View Standards, Terms, and Conventional Practices
Auxiliary views show inclined surfaces in true size and shape. Know primary versus secondary auxiliaries, how a fold line or reference plane relates to the adjacent view, and when partial auxiliary views are preferred. Questions often test whether you can identify which principal view an auxiliary projects from.
Key Takeaway
Domains 5, 6, and 7 reinforce each other. Build a habit of asking, for every drawing you study, "which view shows true length, which shows true shape, and what would a section reveal?" That single drill covers three domains at once.
Domains 8-9: Pictorials, Models, and Assemblies
Domain 8: Pictorial Drawings and 3D Modeling Representation Methods
This domain covers how three-dimensional objects are shown on a page and how solid models are represented.
- Axonometric types (isometric, dimetric, trimetric), oblique, and perspective, with the key distinguishing traits of each
- When each pictorial method is the right communication choice
- 3D modeling representation concepts, such as how solid and surface models differ
Domain 9: Assembly Drawing Methods
Assembly drawings show how parts relate. The exam tests the conventions that make them readable.
- Detail versus assembly drawings and what each communicates
- Exploded assemblies, sectional assemblies, and subassemblies
- Item balloons, leaders, and linkage to the part list from Domain 2
- Section-lining and shading conventions that distinguish adjacent parts
Notice how Domain 9 loops back to Domain 2. The part list and revision-block knowledge you built earlier pays off again here, which is one reason sequencing matters.
Domains 10-12: Dimensioning, Tolerancing, and GD&T
These three domains are where most candidates report spending the most study hours, because they combine rules, arithmetic, and symbol interpretation. They also connect tightly: a dimensioning choice determines what tolerancing can express, and GD&T refines both.
Domain 10: Dimensioning Standards, Including Choice and Placement Methods
Know the rules of good dimensioning: where dimensions go relative to views, spacing of dimension lines, avoiding redundant or chained-dimension problems, dimensioning to features rather than to hidden lines, and choosing between baseline, chain, and datum-style methods. "Choice and placement" means you may be asked which of several arrangements is correct and which violates standard practice.
Domain 11: Tolerancing Calculations and Practices
This is arithmetic you can practice to mastery:
- Bilateral, unilateral, and limit tolerance formats
- Tolerance accumulation in chain versus baseline dimensioning
- Limits and fits: clearance, interference, and transition, including allowance and maximum/minimum clearance calculations
- Reading a fit designation and working out the resulting hole and shaft limits
Domain 12: Geometric Dimensioning and Tolerancing (GD&T)
Learn the characteristic symbols and what each controls: form, orientation, location, profile, and runout. Understand feature control frames, datum reference frames and datum precedence, and the effect of material-condition modifiers on available tolerance. Questions commonly give a feature control frame and ask you to interpret it, so practice reading frames left to right until it is automatic.
For a sense of how these domains drive overall difficulty, see the CEG difficulty guide, and for fast recall of symbols and formulas use the CEG cheat sheet.
Domains 13-16: Manufacturing Callouts and Specialized Topics
The final four domains move from describing geometry to communicating how parts are made and joined.
Domain 13: Machining Specifications, Callouts, and Surface Texture Symbols
Hole and feature callouts and surface-finish notation.
- Drilled, reamed, counterbored, countersunk, and spotfaced hole callouts, and how depth and diameter are expressed
- Surface texture symbol components: roughness, lay, waviness, and where each value is placed
- Reading a callout and describing the resulting feature
Domain 14: Screw Thread Representation
Thread notation is compact and unforgiving.
- Simplified, schematic, and detailed thread representations
- Thread note structure: nominal size, pitch or threads per inch, series, class, and handedness
- Internal versus external thread depiction in views and sections
Domain 15: Springs and Fasteners
Representation and specification of common hardware.
- Compression, extension, and torsion spring drawing conventions and the data a spring drawing must carry
- Bolts, screws, nuts, washers, rivets, and pins: types, head styles, and how they appear on drawings
Domain 16: Specialized Examples (Gears, Sheet Metal, Welding, Castings, Plastics, etc.)
This is the breadth domain. The "etc." in the official heading signals that the topic list is open-ended.
- Gear terminology and the data shown on a gear drawing
- Sheet-metal concepts such as bends, flat patterns, and bend-related callouts
- Welding symbols and joint types
- Casting and molded-plastic features such as draft, fillets, and parting lines
Key Takeaway
Do not skip Domain 16 because it feels like a grab bag. Because ATMAE publishes no weights, a broad, shallow pass through every specialty (gears, welding, sheet metal, castings, plastics) protects you against scattered points you could otherwise lose.
Sequencing the Domains in Your Prep
Generic methodology matters less than ordering, so here is one CEG-specific sequence driven by how the domains depend on each other. Adjust the pace to your background; for a full plan see the CEG study guide.
Standards and units (Domains 1-3)
- Memorize line conventions, sheet and title-block contents, and conversion routines
- These are fast points and the vocabulary for everything else
Geometry and views (Domains 4-7)
- Sketch orthographic, section, and auxiliary views by hand
- Drill first- versus third-angle symbols
Pictorials, assemblies, and dimensioning (Domains 8-10)
- Tie assembly balloons back to part lists from Week 1
- Practice spotting dimensioning violations
Tolerancing and GD&T (Domains 11-12)
- Work limits-and-fits calculations until they are routine
- Read feature control frames aloud
Callouts and specialties (Domains 13-16) plus review
- Build and tab your printed reference set
- Run timed mixed sets under the two-hour constraint
Finish with timed, mixed-domain practice on the CEG practice test site so you rehearse the pace of 142 questions in two hours. If you want realistic feedback on where you stand, the data discussion in CEG pass rate explains what is and is not publicly known.
Registration, Fees, and Eligibility
The fee structure depends on your route. Individual exam fees in USD are:
| Route | Fee |
|---|---|
| Student member | $25 |
| Student non-member | $50 |
| Professional member | $50 |
| Professional non-member | $150 |
| Institutional assessment-only testing | $25 per student (no membership or certification included) |
| Group certification testing | $75 per student |
| Retake | $25 per attempt, no waiting period under the current FAQ |
Individual routes include applicable membership and certification upon passing. After initial certification, annual dues apply: students pay $25 membership plus $25 per certification, and professionals pay $100 membership plus $35 per certification. Initial CEG status continues with annual dues and does not require continuing education. The senior credential, CSEG, is a separate certification and its requirements do not apply to CEG. For the complete pricing picture, see CEG certification cost.
On eligibility, ATMAE recognizes candidates in the last year of an eligible four-year technical, technology, technology-management, or engineering-related BA/BS program, in the second year of an eligible two-year AA/AS/AAS program, or through ATMAE-approved equivalency. The details are in CEG requirements, and scheduling information is in CEG exam dates.
Whether the credential justifies the effort depends on your role and goals; the ROI analysis and the CEG jobs overview discuss where the credential tends to matter, and you can start practicing now at the main practice test.
Frequently Asked Questions
The ATMAE study guide lists 16 major content areas, from ASME standards and line conventions through specialized examples such as gears, sheet metal, welding, castings, and plastics. ATMAE does not publish percentage weights for them.
Yes. Printed reference materials are permitted, but Internet resources and software-based references are prohibited. With 142 questions in two hours, organize and tab your printed materials in advance so lookups are quick.
The current credential page states 142 multiple-choice questions, with two hours allowed per the certification FAQ. Older study-guide text mentions 145 questions and its allocations total 160. Those legacy figures conflict, so rely on the current ATMAE credential page.
A cumulative score of 70 points or higher, not 70%. Because the passing standard is expressed in points, avoid treating a practice-test percentage as a direct pass prediction. See the passing score guide for details.
No. CEG covers engineering-graphics knowledge such as standards, projection, dimensioning, tolerancing, and symbols. It is not a software-specific CAD performance test, so focus on the 16 content areas rather than on a particular software package.