For anyone working through the CSWA practice problems, I need help clarifying something on a practice problem. I just did practice problem 6.12 and there's one part that confuses me. With the dimensions provided, it doesn't seem like there is enough info to get a fully defined sketch for the revolve. You kind of have to assume the vertical relationship between a few points to get the right answer but there are 2 valid sketches with only 1 of them being the correct answer.
At first, I fully defined the sketch by assuming the 2 end points on the 2mm radius were vertical and got 5003 cubic mm, which is wrong. Later I changed to having the endpoints of both 4mm radii vertical and got the correct answer of 4630 cubic mm. The confusing thing is all 4 endpoints on the 4mm radii cannot be vertical, otherwise the sketch would be invalid so the correct answer requires the endpoints of the 2mm arc to not be vertical, but you would not really be able to tell based on the drawing.
My question is when you actually take the CSWA, how would you know that this is actually the case, since both results produce valid sketches and the information isn't specified by the drawing. Is there some knowledge I'm missing? I know there's a measurement that says R4 TYP, but I assume that just means that both the radii shown in the drawing are 4mm, but only 1 is dimensioned. There is no way for all 4 endpoints on the arcs to be vertical because that would create an invalid sketch.
For the experienced users or the people that have modeled this problem, how would you handle this? Thanks!