As I explained before in my first posting, you will be subjected to a different test each time you test out, same goes for the written also.
So on your next copper jig, you might have exactly what I described as a possible set of dimensions. The idea they are getting across is for you to understand the process of determining lengths when all the dimensions are not given. So, the next time you take the test, you will have to be prepared to know your cross-cut dimensions of the fittings you bring, along with knowing the math to determine lengths to equal out to the rest of the dimensions you need to perform the task. I think they still allow you to bring a calculator, no?
“Your best interest is secured by making the right decisions the first time.”