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The American Society of
Mechanical Engineers offers certification programs for
geometric dimensioning and tolerancing per ASME Y14.5M - 1994.
There are two levels of
certification available at ASME - technologist and senior.
Technologist Level
Certification
The technologist level
certification provides an objective measure of an individual's
ability to understand drawings which have been prepared using
the language of Geometric Dimensioning and Tolerancing (GD&T),
as defined in the ASME Y14.5 Standard.
The Technologist
Level examination is a maximum of 4 hours in duration
consisting of 100 to 150 questions. The examination is
structured as a closed book, multiple choice, written
examination, evaluating the applicant's knowledge of GD&T
principles, concepts, and practices in accordance with the
current ASME Y14.5 Standard. The approximate distribution of
questions will be as follows:
(a) 10% of the questions on scope, definitions, and general
dimensioning.
(b) 10% of the questions on general tolerancing and related
practices; and former practices included in Appendix D of ASME
Y14.5.
(c) 5% of the questions on symbology
(d) 15% of the questions on datum referencing
(e) 30% of the questions on tolerances of location
(f) 30% of the questions on tolerances of form, profile,
orientation, and runout.
A candidate must achieve at least a 75% grade overall, and at
least 50% in each of the above categories.
Senior Level
Certification
The senior level
certification, provides the additional objective measure of an
individual's ability to select proper geometric controls as
well as to properly apply Geometric Dimensioning and
Tolerancing to drawings.
The Senior Level
examination is a maximum of 6 hours in duration consisting of
100 to 150 questions. The examination is structured as a closed
book, multiple choice, written examination. The Senior Level
examination will emphasize knowledge, selection, and
application of the geometric dimensioning and tolerancing
(GD&T) principles, concepts, and practices contained in the
current ASME Y14.5 Standard and Appendices. The approximate
distribution of questions will be as follows:
(a) 10% of the questions will cover topics from the
Technologist's Level Body of Knowledge (see above)
(b) 20% of the questions on datum selection
(c) 40% of the questions on geometric tolerancing & related
principles, tolerance calculation, and appendices
(d) 15% application of modifiers in feature control frames
(e) 15% composite tolerancing.
A candidate must achieve at least an 80% grade overall, and at
least 50% in each of the above categories.
For additional
information, including information on a testing facility near
you Please ASME
ASME_GDTP
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