Most trade unions require applicants to pass an apprenticeship aptitude test before entering any program. This is a cognitive screening exam - it tests math, reading comprehension, and reasoning ability, not trade knowledge. The same core format applies whether you are applying to a plumbing, pipefitter, sheet metal, ironworker, or millwright apprenticeship. Unions use your score to rank applicants, so a higher score directly improves your chances of being selected. JobTestPrep's apprenticeship practice test PrepPack covers every subject area tested, with timed practice tests, trade-specific questions, and full answer explanations. Our preparation is designed to be harder than the real test - so on test day, you are ready.