Free GDTP Senior Level Exam Prep
ASME GDTP Senior Level
Prepare for the GDTP Senior Level exam without spending hundreds on expensive prep courses. Free study guides, practice questions, flashcards, and related exam resources.
Quick Facts
Buy on AmazonExplore More ASME Personnel Certifications
Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.
GDTP ASME Personnel Certifications License: Complete Roadmap
Follow this path to organize your licensing and exam preparation
Confirm Scope and Senior LogisticsYou are here
Review the active 1994 and 2009 certification bases, Senior eligibility, six-hour closed-book format, passing rules, Prometric scheduling, and the difference between Technologist interpretation and Senior application.
Datum Selection and Datum Shift
Spend the largest block on functional datum feature choice, precedence, datum targets, common datums, datum feature simulators, RMB/MMB/LMB, and datum shift behavior.
Location, Modifiers, and Calculations
Practice position tolerancing, MMC/LMC/RFS selection, bonus tolerance, virtual condition, projected tolerance zones, functional boundaries, and simultaneous pattern requirements.
Profile and Composite Controls
Build fluency with true profile definition, datum-referenced profile, unequal disposition, limited scope, all-around controls, composite position, and multiple-segment feature control frames.
Manufacturing, Inspection, and Gaging
Finish with fixture implications, CMM datum alignment, hard gage boundaries, process capability, castings, sheet metal, weldments, and functional review of over- or under-controlled drawings.
Can You Take the GDTP Senior Level Exam?
Check if you meet the basic eligibility requirements
- •Purchase the Senior Level application/exam package and submit the application through ASME PC-Connect.
- •After ASME accepts the application, schedule the exam through Prometric within the published 180-day eligibility window.
- •Successfully pass the Senior GDTP examination.
- •Technologist certification and ASME membership are not required for Senior Level eligibility.
- •Choose the intended certification basis carefully; ASME states that certification is currently based on either the Y14.5-2009 or the Y14.5-2018 revision, keeps the Y14.5M-1994 exam available on request, and confirms that passing one revision does not certify any other.
GDTP Senior Level Quick Facts
Time to Get Licensed
10-16 weeks for candidates with substantial GD&T drawing, design, manufacturing, tooling, or inspection experience
From start to license in hand
Retake Policy
ASME states that a candidate may attempt the exam up to two times within a six-month period and that after a second unsuccessful attempt the candidate must wait 180 days before becoming eligible to retake it, with a retake fee applying once the waiting period has passed ($413 for the 2009 Senior).
Total Cost Breakdown
Free GDTP Senior Level Prep Tools
Reported exam pass rate: ASME does not publicly publish GDTP Senior Level first-time pass rates on the opened official sources.. Check the exam sponsor for the latest official figure.
100 Senior-Level Questions
Application-focused practice on datum selection, modifiers, tolerance calculations, composite controls, profile strategy, projected zones, and functional gaging.
Design-Intent Explanations
Explanations emphasize why a control is selected, what functional boundary it protects, and how inspection or manufacturing consequences follow.
2026 Updated
Metadata verified against the ASME GDTP program page and the ASME Applicant Information Handbook (2026) on August 3, 2026, covering the concurrently offered 2009 and 2018 Senior exams.
Free Practice
Study Senior-level GD&T application decisions before paying the ASME Senior Level application/exam package fee or buying additional prep materials.
What You'll Study
14 chapters covering the exam topics in this guide
Introduction & Exam Overview
4 sections
Dimensioning and Symbology
6 sections
Datum Referencing I: Selection and Precedence
4 sections
Datum Referencing II: Modifiers and Shift
4 sections
Datum Referencing III: Setup and Calculations
5 sections
Form Controls
3 sections
Orientation Controls
3 sections
Location I: Position and Boundaries
3 sections
Location II: Application and Modifiers
4 sections
Location III: Patterns and Allocation
4 sections
Profile I: Fundamentals and Strategy
4 sections
Profile II: Scope and Verification
4 sections
Runout Controls
3 sections
Exam Strategy and Calculations
4 sections
GDTP Senior Level Exam Details
ASME GDTP Senior Level
Administered by The American Society of Mechanical Engineers (ASME)
Exam Content Breakdown
Based on the official The American Society of Mechanical Engineers (ASME) content outline
Senior-level use of ASME Y14.5 dimensioning rules, symbols, basic dimensions, feature control frame structure, and drawing communication.
Functional datum feature selection, precedence, datum targets, common datum features, datum simulators, RMB/MMB/LMB conditions, datum shift, and inspection setup.
Application of flatness, straightness, circularity, and cylindricity where local form affects fit, sealing, bearing, or datum establishment.
Selection and application of parallelism, perpendicularity, angularity, and orientation controls with functional datum relationships and material modifiers.
Position tolerancing, true position, virtual and resultant conditions, bonus tolerance, projected tolerance zones, pattern controls, simultaneous requirements, and tolerance allocation.
Profile of line and surface, datum-referenced profile strategy, true profile definition, unequal disposition, all-around and limited-scope controls, CMM evaluation, and manufacturability.
Circular runout, total runout, datum-axis simulation, rotating part function, and selection tradeoffs versus position, profile, and form controls.
What's Included
14 Chapters
Complete exam coverage
Practice Quizzes
With detailed explanations
Free to Start
No credit card required
Quality Exam Prep Shouldn't Cost Hundreds
I'm Ran Chen, an engineer with 20+ years of coding experience. I passed my Life Insurance license, EA exam, SIE, Series 6, 63, 65, and finally the CFP® exam.
Through all these exams, one thing became clear: exam prep is expensive. But with AI, we can change that. Quality preparation can now be free for everyone.
What's Next After the GDTP Senior Level?
After passing the GDTP Senior Level, you can pursue these career paths
Dimensional Engineering and Design Authority Roles
Use Senior GDTP competency to own datum schemes, tolerance allocation, and GD&T requirements for production drawings and model-based definitions.
Manufacturing, Tooling, and Supplier Quality Leadership
Apply advanced GD&T decisions to process planning, fixture design, supplier review, functional gaging, and acceptance strategy.
ASME Y14.5-2018 Senior Certification
Add the Y14.5-2018 Senior credential that ASME now sells alongside the 2009 exam, covering the deleted concentricity and symmetry controls, the dynamic profile modifier, and default datum stabilization.
GDTP Senior Level Exam FAQ
Official The American Society of Mechanical Engineers (ASME) Resources
Verify information with these official sources
More Free Resources
Ready to Start Your Free GDTP Senior Level Prep?
Review the study guide, practice key concepts, and use the free tools at your own pace.