I'm a mechanical drafter with 5 years of SolidWorks and AutoCAD experience preparing for the Certified Drafter exam. My employer sponsored it as part of a skills development push and I want to use the prep time well rather than just show up and wing it.
The exam covers drafting standards, geometric dimensioning and tolerancing (GD&T), section views, assembly drawing interpretation, and materials/manufacturing process basics. GD&T is the area I know least well — I apply basic tolerancing in my daily work but the full ASME Y14.5 framework is deeper than what I use regularly.
Feature control frames, datum references, form and orientation tolerances, true position calculations — I understand the concepts but I can't always work through the applied problems quickly. That's what I'm drilling with practice problems now.
For those who've passed the Certified Drafter exam: how mathematically demanding is the GD&T content? And are the section view questions on complex assemblies or mostly straightforward parts?
Materials and manufacturing process content is lighter on the exam than the study guides make it seem — maybe 10-15% of questions. Basic material properties, common manufacturing methods and their tolerancing implications. Don't over-invest there at the expense of GD&T and standards.
GD&T math on the exam is present but not extreme — mainly true position calculations using the formula and bonus tolerance concepts. If you can work through those reliably you're fine. The conceptual symbol recognition and application questions outnumber the calculation questions.
Alex Krulikowski's GD&T materials are the clearest explanation of ASME Y14.5 for exam prep. His workbook format with applied problems is exactly the kind of drill you described needing. Worth getting if you don't already have it.
Section views are on moderately complex parts — not simple blocks but not full assemblies either. You need to correctly identify cutting plane location, removed material, hatching direction and pattern, and what features are visible. Clean fundamentals matter more than advanced interpretation.
Five years on SolidWorks and AutoCAD will carry you further than you think on the practical side, but the CD exam isn't really testing whether you can model something. It's testing whether you know the standards cold. The thing that actually moved the needle for me was changing how I drilled questions. Instead of just confirming the right answer and moving on, I'd force myself to explain why each of the other three options was wrong. Sounds tedious but it's where the real learning is. A GD&T question will throw four datum callouts at you and three of them are plausible, and if you can't articulate exactly why a position tolerance wouldn't apply there, you don't actually understand it yet.
I leaned on practice questions a lot for the CAD proficiency portion since that's the part people assume they'll coast through and then don't. These free drafter computer aided design cad software proficiency ones were good for that because the wrong answers are usually the common misconceptions, so picking them apart teaches you the standard better than the right answer does. Spend your prep time on the why and you won't be guessing on exam day. You'll know.
I'm in pretty much the same boat as you. Five years on the tools, employer pushed me toward the cert, and I had zero spare time to study so I had to get creative. What worked for me was treating it like little chunks instead of big sessions. I'd do twenty minutes before work with my coffee and maybe another half hour after the kids went down. Weekends I'd do one longer block. The ASME stuff and GD&T was where I spent most of that time because honestly years of just modeling in SolidWorks doesn't mean you've memorized the tolerancing rules the way the exam wants them. I knew how to apply it on a part. Naming the control frames and datum stuff cold was a different thing.
The other piece that helped was doing actual questions early instead of just reading. I leaned on this free drafter computer aided design cad software proficiency set during slow lunch breaks and it was good for spotting the gaps fast. You think you know a topic until you miss three in a row on it. Don't wait til the end to start testing yourself, that was my one regret. Start mixing in questions from week one and it sticks way better.