Complete Plumbing Aptitude Test Course for Union Apprentices [2026]
Updated: March 2026
The Plumbing Union Aptitude Test is a pre-employment cognitive assessment administered by GAN Human Resources on behalf of the United Association (UA) of Journeymen and Apprentices of the Plumbing and Pipefitting Industry. It is the required entrance exam for candidates applying to union plumbing apprenticeship programs across the United States - and it is not a test of plumbing knowledge.
- The test consists of approximately 140 questions across 6 sections: Reading (42 questions, 25 minutes), Numerical Computation, Numerical Reasoning, Folding, Problem Solving (35 questions, 35 minutes), and Mechanical Comprehension. Total testing time: 120 minutes. No calculator is permitted.
- Scoring is pass/fail at a threshold of 70% at most UA locals. However, most locals rank all applicants by score and fill available apprenticeship slots from the top down.
- The test is administered in person during open enrolment only - typically 1-2 a year. There is no rescheduling; a poor score means waiting up to 12 months for the next cycle.
* GAN Human Resources administers the Plumbing Union Aptitude Test on behalf of local UA unions nationwide.
Plumbers Union Aptitude Test Practice
1-Month Access
- Reading and verbal comprehension practice tests
- Numerical Computation practice tests and guides
- Numerical Reasoning (number series) practice tests
- Spatial reasoning practice tests for the Folding section
- Problem-solving (word problems) practice tests
- Mechanical Comprehension practice tests
What are the Main Challenges of the Plumbing Aptitude Test?
The Plumbing Union Aptitude Test is challenging because it combines six different cognitive skill areas into a single 120-minute sitting - and your score does not just need to pass, it needs to rank. Most UA locals fill apprenticeship slots by score order from the top down, so every point counts.
The challenge is not any one section in isolation. It is the combination: you need to move quickly through 42 reading comprehension questions, shift into arithmetic and numerical reasoning without a calculator, then tackle Folding - a spatial reasoning section that most candidates have never encountered in any form before. Mechanical Comprehension, consistently the section candidates find hardest, requires understanding gears, pulleys, levers, and basic physics principles under time pressure..
Question 1 - Numerical Reasoning
The Numerical Reasoning section assesses how well you identify numerical patterns. This section contains 10 number series questions to be solved in 10 minutes. Each question has 5 answer choices, only one of which is correct.
Numerical Reasoning Sample Question
0 , 3/4 , 8/9 , 15/16 , 24/25 , ?
Question 2 - Problem Solving
The Problem Solving section tests your ability to translate word problems into mathematical equations and solve them accurately under time pressure. This section contains 35 questions to be completed in 35 minutes. Each question has 5 answer choices, only one of which is correct. No calculator is permitted.
Problem Solving Sample Question
A man walked at a pace of 5 mph for 3 hours and then ran at a pace of 8 mph for half the time. What was the total distance in miles that he covered?
Question 3 - Reading Comprehension
The Reading section assesses your ability to read and comprehend texts, as well as draw conclusions from them. The section contains 42 questions to be solved in 25 minutes. Each question has 4 answer options, only one of which is correct.
Reading Sample Question
The exponential growth and development in the services and activities of search engines during the past decade has brought about a number of challenging legal issues in the area of copyright law. While search engines are continuously expanding their reach, copyright law has largely failed to adequately respond to these technological advancements. Rather, the current situation is one of rigid, outdated copyright laws being applied to online activities, which were never contemplated when the original legislation was drafted – causing great ambiguity. Search engines have the crucial role of ensuring the free flow of the internet’s core purpose – access to information. However, by their very nature, copyright laws fundamentally challenge this concept of a freely flowing and accessible internet.
Which of the following statements regarding copyright law is correct?
Question 4 - Numerical Computation
The Numerical Computation section of the Plumbing Aptitude Test assesses your ability to calculate quickly and accurately without using a calculator. It contains 28 questions on two topics: fractions and decimals. Each question has 5 answer options, only one of which is correct.
Numerical Computation Sample Question
Convert 3/13 into decimal.
Question 5 - Folding
Folding questions measures your ability to visualize three-dimensional shapes. It contains 12 questions to be solved in 15 minutes.
Folding Sample Question
Question 6 - Mechanical Comprehension
The Mechanical Comprehension section measures your ability to understand and apply mechanical principles. These questions, similar to what you will see in mechanical aptitude tests such as the famous BMCT usually do not require any previous knowledge, but an understanding of basic physics will tremendously help. The test contains 13 questions to be solved in 13 minutes.
Mechanical Comprehension Sample Question
In which way is the wagon accelerating? (If neither, mark C.)
The correct answer is A
The pendulum is moving backward; therefore, the car is accelerating in the opposite direction.
What happens when an object is in an accelerating system, in the same way, you feel pulled back when the car is speeding up or forwards when it is braking.
Remember the physical principle: When an object is within an accelerating system (another object that accelerates or decelerates), the inner object's force will be in the direction opposite to the acceleration.
What's Inside Our Plumbing Union Aptitude Test PrepPack?
- Full-length practice tests covering all six sections of the GAN Human Resources plumbing aptitude test - Reading, Numerical Computation, Numerical Reasoning, Folding, Problem Solving, and Mechanical Comprehension - timed and formatted to match real test conditions. Candidates who complete the full PrepPack consistently report the actual exam felt easier.
- Section-specific drills targeting the skills each section demands - with dedicated practice sets for Folding and Mechanical Comprehension, the two sections candidates most commonly underperform on without structured preparation.
- Study guides covering the full scope of GAN test content - the spatial reasoning principles behind Folding questions, the mechanical concepts tested in gears, pulleys, and levers, and the numerical frameworks for computation and reasoning sections. Clear explanations and worked examples, not just answer keys.
- Detailed step-by-step explanations for every question, teaching you the reasoning behind each correct answer so you build genuine understanding across all six sections - not just familiarity with question formats.
- A proven platform founded in 1992, with 400+ Trustpilot reviews and a money-back guarantee. The PrepPack is calibrated to be harder than the actual GAN test - so that when the real exam arrives, the timing, difficulty, and cognitive demands all feel familiar.
Please note: The Plumbers Union requires knowledge of state—or city-specific codes across the US. Our Plumbing Aptitude Test prep pack covers the national cognitive abilities sections but does not include materials for the more specific plumbing knowledge you may need. Furthermore, it is only suitable for US-based plumbers.
Plumbing Aptitude Test FAQs
Most UA locals set a passing threshold of 70%. But passing is not the same as getting in. Most locals do not admit every candidate who scores above 70% - they rank all applicants by score and fill available apprenticeship slots from the top down. A candidate who scores 71% may not receive an offer if the local received enough 85%+ scorers to fill all positions that cycle.
The practical target is not the passing threshold - it is a score competitive enough to rank in the top tier of your local's applicant pool. Because GAN Human Resources does not publish competitive ranking benchmarks publicly, the safest preparation strategy is to score as high as possible, not just to clear the minimum. You can read more about the GAN Aptitude Battery - the test framework used across all plumbing union locals - directly at ganhumanresources.com/gan-aptitude-test.
Scores from one UA local's aptitude test are generally not transferable to another local's application process. Each local operates its own independent recruitment cycle, sets its own enrollment window, and ranks applicants within its own pool. If you apply to UA Local 130 in Chicago and later decide to pursue Local 38 in San Francisco, you would typically need to apply separately during that local's open enrollment and sit the aptitude test again as part of that application. There is no national score registry.
Score portability policies are set by each local independently - if you are considering multiple locals, contact each one directly to confirm their requirements. You can find and contact your nearest UA local through the official union directory at ua.org.
You wait for the next enrollment cycle - which may be 6 to 12 months away, or longer at locals with annual-only recruitment. This is fundamentally different from failing an employer-administered test with a 30-day retake window.
UA locals run one or two application windows per year. A candidate who does not score competitively does not reschedule - they reapply from scratch at the next cycle, competing against a new pool of applicants for the same fixed number of apprenticeship slots. The GAN aptitude test is only administered during these open enrollment periods, not on demand. Retake and reapplication policies vary by local - check with your UA local directly for their specific cycle. You can confirm your local's schedule at ua.org/apprenticeship.
This is why preparation before your first attempt matters more here than in almost any other pre-employment test. There is no 30-day wait option. There is next year's class.
A UA plumbing apprenticeship is a 5-year earn-while-you-learn program registered with the U.S. Department of Labor. You earn competitive wages from day one - starting as a percentage of journeyman scale - with structured annual raises every time you advance in the program. There is no student debt. No tuition. No loans to repay when you finish.
By the time you complete the program you have approximately 10,000 hours of hands-on trade experience, a journeyman plumber license, full union benefits including healthcare and pension, and a nationally recognized credential that is respected across North America. Many UA training centers also partner with community colleges, meaning apprentices can earn college credits toward an associate degree simultaneously - graduating as a journeyman with zero student loan debt and a path to further advancement.
Journeyman plumbers in UA locals earn top trade wages in one of the most consistently in-demand skilled trades in the US. The path from apprentice to journeyman to master plumber is one of the clearest and most financially structured career ladders available without a four-year degree.
You can explore the full UA apprenticeship structure, wages, and benefits at ua.org/apprenticeship and ua.org/career-paths/journeyman.
The Plumbing Union Aptitude Test is 140 questions in 120 minutes - less than 52 seconds per question on average, with no calculator permitted. A static PDF cannot replicate that pressure. It does not track your pace, it does not flag when you are falling behind section time limits, and it does not show you how your performance changes under real test conditions.
The GAN Aptitude Battery was specifically designed to assess how candidates perform under timed cognitive load - math, reading, and spatial reasoning all within tight time constraints, as confirmed on GAN's own site at ganhumanresources.com/gan-aptitude-test. Practicing from a PDF tells you whether you can solve a question. Timed simulation tells you whether you can solve it fast enough, consistently enough, across all six sections in a single sitting.
JobTestPrep's PrepPack replicates the exact format, section structure, and time constraints of the GAN test. Candidates who complete the full PrepPack consistently report the real exam felt easier - not because the test got simpler, but because the cognitive load, the pacing, and the pressure were already familiar. A PDF gives you the questions. Timed simulation builds the performance.
The United Association (UA) of Journeymen and Apprentices of the Plumbing and Pipefitting Industry is the primary labor union governing professional plumbing in the United States and Canada. Founded over 60 years ago, the UA runs the country's first nationally registered joint apprenticeship program and represents plumbers, pipefitters, HVACR technicians, welders, and fire protection workers across North America.
In most US states, performing licensed plumbing work legally requires a journeyman or master plumber license - and the most structured, best-compensated path to those licenses runs through the UA's registered apprenticeship program. Non-union plumbers can work in some markets, but they typically follow a less structured pay progression, receive fewer guaranteed benefits, and may face limitations on the types of jobs they can legally bid on or work on publicly funded projects.
Union membership is not a bureaucratic hurdle. It is access to the 5-year earn-while-you-learn program, the negotiated wage scale, healthcare and pension benefits from day one, and the nationally recognized credentials that define the professional plumbing career path. As the UA puts it directly: apprentices are accepted into a program that is the equivalent of a full-ride, tuition-free scholarship - while earning wages to support themselves from the first day on the job.
After completing your payment, you will receive two emails: a payment receipt and a login link with your account details. Once you log in and reset your password, you will have instant, unlimited access to your PrepPack.
You can start practicing immediately with tailored questions and detailed explanations, tracking your performance along the way. Your progress is saved, allowing you to revisit previous attempts as many times as you like. If you need more time, you can extend your subscription by contacting c.serv@jobtestprep.com.
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