There is no single UA apprenticeship test. Your local picks it, and the options look very different

Several UA locals test mechanical aptitude: Local 343 names a mechanical part and a Local 98 listing recommends the Wiesen Test of Mechanical Aptitude. Our mechanical practice test drills levers, gears, fluids and pressure with a drawing on every item. Our WorkKeys-style test covers the math and documents side some locals use.

Locals use different tests, so none of our tests is your exam. We do not reproduce the GAN battery, its timing or its reading and verbal parts, and a practice band cannot tell you whether you would clear a local's 70 percent line.

The first is the GAN aptitude test. GAN Human Resources administers it for many UA locals, and Local 149's application names GAN as its test administrator. Prep sites describe a plumbing version of about 140 questions across six topics in 120 minutes, with reading, verbal and problem-solving parts, and say steamfitters take the same framework.

The second is a local exam in two parts. Local 343 in Vacaville lists math, described as numerical ability, and mechanical aptitude, with a 70 percent minimum. The third, recommended in a Local 98 listing, is ACT WorkKeys plus the Wiesen Test of Mechanical Aptitude, taken as soon as possible after you decide to apply.

Call or email the training center and ask three questions: which test, where and when, and whether a study guide exists. One forum poster on a UA board says their training center sold a guide at application that was close to the test, which is worth more than any general practice.

If the answer is WorkKeys, note that the Local 98 listing recommends taking it as soon as possible, so start early. Our WorkKeys practice test covers Applied Math, Graphic Literacy and Workplace Documents on their usual 55-minute clocks.

Every setup tests arithmetic and problem solving. A forum poster preparing for a pipefitter local lists basic algebra, geometry, fractions, conversions and number lines, and prep sites describe a problem-solving section built on word problems.

Pipe trades measure in fractions of an inch and convert between units, so practise adding and subtracting mixed numbers, converting fractions to decimals, and solving one-step equations until they are quick. Practise without a calculator unless your local tells you one is allowed, because the sources we found do not settle it.

Where a local names a mechanical part, expect pictures: gears, levers, pulleys, and fluids moving through pipes and valves. The Wiesen test that Local 98 recommends is a published mechanical aptitude test of this picture-based type.

Our mechanical aptitude test includes a fluids and heat topic alongside gears and levers, which suits pipe trades. Use how to pass a mechanical aptitude test to learn the rules before you drill for speed.

Local 343 publishes a 70 percent minimum passing score, and Local 396 is described as using 70 percent as the line for advancing to interview. A pass opens the next step rather than settling the outcome, so a strong interview, work history and reliability still matter after the test.

Aim for a comfortable margin in timed practice and bring proof of anything relevant, such as math classes, construction work or military service, to the interview. If you fall short, ask the local when the next recruitment opens and how soon you may test again.

These come from anonymous reviews, university careers pages and prep guides. They often disagree, and Plumber and pipefitter apprentice (UA) has not confirmed them. Read them as leads, not rules.

• Prep sites describe the GAN plumbing aptitude test as 140 questions across six topics in 120 minutes.
• A forum poster preparing for a UA pipefitter local says to expect basic algebra, geometry, fractions and conversions.
• Prep sites say steamfitter applicants at UA locals take the same aptitude test framework as pipefitters.