Union apprenticeship sign-ups near San Diego - what worked for you?

A local apprenticeship programme is taking applicants for the next intake. The application needs a diploma or equivalent, a driver's licence and a short aptitude test. How hard is the test?

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

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