Union apprenticeship sign-ups near St. Louis - what worked for you?

A local apprenticeship programme is taking applicants for the next intake. There are 17 people counting on me, so I am trying to be careful. Applications close in 15 weeks. 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.