Union apprenticeship sign-ups near Austin (update)

I heard of an apprenticeship with paid on-the-job training for people changing careers. It has been weighing on me all week. The application needs a diploma or equivalent, a driver's licence and a short aptitude test. How hard is the test?

Keep everything in writing and save the confirmation numbers. It saved me later.

Visit the training centre in person if you can. Seeing the classrooms helped me decide.