Union apprenticeship sign-ups near Knoxville - 9 weeks in

I heard of an apprenticeship with paid on-the-job training for people changing careers. I have read a lot of threads here and could not find my exact situation. The application needs a diploma or equivalent, a driver's licence and a short aptitude test. Did anyone go through it?

The aptitude test was mostly maths and reading a diagram. Free practice tests online were enough for me.