Union apprenticeship sign-ups near Omaha - any advice?

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. How hard is the test?

Bring your transcripts and any proof of work history. They asked for both in the interview.

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