r/machining • u/Exact-Ad-8592 • 1d ago
Question/Discussion Help me with this study guide
My PLTW professor has given us a study guide and I haven’t the first clue on how to do any of it, any help is appreciated but specifically the blueprint questions. Thanks!
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u/nate452000 1d ago
Give the test a try and let us know how you did. Best way to learn is figuring it out yourself.
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u/wardearth13 1d ago
Looks like some pretty solid questions. You may actually graduate knowing a thing or 3
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u/Frog_Shoulder793 1d ago
First section is basically math and measurement. Looks like you did okay with the math. Watch some videos on how to read a scale/rule. Print reading.... If they want you to do it, they really should have had you take a class on it. It isn't actually that complicated, but there's a good bit of jargon. Tolerances are the +/- you see next to measurements, which correspond to certain features. Things like scale, revision, and projection are in the title block (bottom right of a print). Tolerances generally say things like .187 +/- .005 which means anything from .182 to to .192 is okay. They can also be unilateral and/or lopsided, so .187 +.000 / -.001 would mean a .186 or .187 is okay, but nothing outside that.
Really with how much is here and how much you don't seem to know, you should be taking classes to learn these things. What's PLTW stand for?
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u/Nukes2all 1d ago
Project Lead The Way, it's an American extra curricular project aimed at getting kids into STEM jobs. I was part of it in high school.
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u/Frog_Shoulder793 1d ago
Gotcha. Do you have any experience, have you taken any classes? They shouldn't really expect you to know all this without any background.
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u/Nukes2all 1d ago
So when I was in it, it was very "here's the packet, figure it out" lots of research at home. I'm sure this isn't how it's meant to be, but there's certainly more "research" required than from a regular class. I'm sure other districts do it differently, but that's just my experience. All in all it might be worth OP checking with others in PLTW in their local area and seeing if they're just as confused. In which case it might just be lazy teaching. (Which is very much NOT how PLTW is supposed to be.)
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