If the toleranced hole is produced at its LMC size and perpendicular to datum plane A, this will produce the uniform wall thickness.Īgreed. Take pylfrm's example again and imagine that the flat spot on the OD goes from the top to the bottom of the part. You may get uniform wall thickness of 16.15 throughout the entire depth. The thinnest wall as a complete wall (throughout the depth) would be based only on the RAME. One other thing to think about though: the perpendicularity is only of concern if we are looking for the thinnest wall at one particular cross-section (depth-wise). There is a lot to say about this subject. Who cares about remembering that in reality? One may always open the book and check such details when needed, right? One of the cons is that even the most experienced guys that went through hundreds of different real-life applications of GD&T, will most likely have difficulties to pass the exam, because in the test they may find questions about things like minimum allowable distance between dimension line and the part contour, or proper selection of different line styles (chain vs.
#ASME Y14.5 2017 PDF HOW TO#
One of the pros is that they may actually have no idea on how to properly apply GD&T on real drawings yet they can become GDTP certificate holders (that is unfortunately one of the biggest flaws of the exam on both levels, in my opinion). Perhaps I shouldn't, but I always tell them that this test (Technologist level) is not to recognize how good they are in GD&T, but is to check their knowledge of the content of the standard, and that this obviously has some pros and cons.
#ASME Y14.5 2017 PDF FOR FREE#
There is a body of knowledge document available for free on the ASME website (also in form of official Y14.5.2 standard) that is very useful to determine what needs to be studied in particular. They have to study the book on their own afterward. The training I do for them is only 10 hours long (1 hour per week), so it is technically impossible to touch in details everything that is required to pass the test. One of the most important things (if not the most important) is that these folks are told they have to study the standard carefully before they go to the exam. Thank you, but I would not say it is a matter of what kind of a teacher I am - at least not in case of preparation course for GDTP certification. You don't believe me? Look at your own posts here on eng-tips (and how many stars / appreciations you got:)) Well, I think that is because YOU are an excellent teacher. RE: pass rate for ASME Y14.5 certification test Belanger (Automotive) 13 Jan 17 04:17 Answering it requires making an assumption about the relationship between datum feature B and datum feature A. , question 3 is a question that is not answerable because the relation between the involved datums -ooops- datum features, isn't specified. 'Parrot' questions are popular because they are easy to make into multiple choice questions and true-false questions. I contrast those with 'ferret' questions, where one needs to understand how the rules work to produce results. Taking off points, for example, by not recognizing that a datum cannot be modified that modifiers only apply to datum features. 'Parrot' questions require memorization but not much understanding.
What is more key is if a lot of the test is 'parrot.' This is the type where phrases are slightly altered from the exact wording of the standard and it is up to the test taker to identify which most accurately parrots the original. Of them, only the last didn't pass the first time, so that's a 66% pass rate in that tiny sample.īased on the work of those who haven't studied, I'd say 15% is high, but maybe TecEase finds those who have self-selected. I know 3 people who took the '1994 test one who had good experience and studied, one a loud mouth who studied, and the third was a loud-mouth know-it-all who didn't need to study. They are probably reporting the expected rate based on the applicable population, not for those who study.
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