Hi Gina...
I'm going to take a stab at this question, but I'm not sure if the answer will be completely what you are looking for. It sounds like you might want to try and use Outcomes for your competency exam. This way, you can align an outcome with a quiz. I've found the following two Guides for you:
What are Outcomes?
How do I align an Outcome with a Question Bank?
Faculty in our Gen Ed department have recently wanted to try this for their courses. However, in my own testing, if I set an outcome at 1 point (Met the outcome), the outcome was giving a score of 1/1 and not 0/1 after my sample quiz had been taken (I set my quiz so that 60% or more met the outcome ... but I purposely answered quiz questions as a Test Student to get less than 60%.) So, I checked with the Canvas Help Desk staff, and it sounds like it's a bug.
Take a look at the Guides (and also the Calculation Methods in the first link) to see if this might meet your needs.
I welcome other ideas in case I'm way off track!
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