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For people that don't know this is not how you use Calipers
this post was submitted on 22 Aug 2023
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I remember when I first applied for a job in a fabrication/machine shop. One of the questions in the interview was "Do you know how to read a tape measure‽" followed by "demonstrate that you can use a tape measure" along with some other fun ones like "what is the difference between these two pieces of material" (one was aluminum, the other stainless) and other such things. I remember being surprised/disappointed that there were grown people who couldn't read a tape measure.
I've worked in machine shops and drafting offices for years now, and I'm no longer surprised by people who can't use basic measuring tools. Still disappointed though.
Did they expect you to identify which metals they were, or just that they were different metals?
I was expected to know that one was stainless steel and the other was aluminum, but not the specific grades of stainless or aluminum. Stainless and aluminum can look very similar when they're dirty, and 300 series stainless won't stick to a magnet just like aluminum won't stick to a magnet. But if you pick them up or even rap on them with your knuckles you can tell the difference.