MASS Test - Practice Questions and Study Guide for EEI Assessment (2026)
The Edison Electric Institute (EEI) MASS test, formally the Power Plant Maintenance Positions Selection System, is a pre-employment assessment used by investor-owned electric utilities to screen candidates for maintenance roles such as electricians, welders, pipefitters, and steelworkers. The MASS test includes 118 questions across four sections, Mechanical Concepts, Mathematical Usage, Reading Comprehension, and Assembling Objects, completed in about two hours.
JobTestPrep's MASS test prep mirrors this exact structure, section by section, so you walk in already familiar with the pacing and question types. Our study guide and full-length practice tests come with detailed answer explanations and performance tracking, so you find weak areas before exam day, not during it.
MASS Test Practice
+POSS Course
1-Month Access
PrepPack Includes:
- Diagnostic Test (20 Q) + 2 Full-Length MASS Simulations (118 Q each, real exam format)
- 45 Practice Tests covering Mechanical & Electrical, Mathematical Usage, Assembling Objects, and Reading Comprehension
- Verbal Reasoning video tutorial + 3 study guides
48 practice tests total — matched section-by-section to the real MASS structure
MASS Test Practice Questions
Question 1 - Mechanical Concepts
Try answering this question in 27 seconds- that's how long you'll have during the test.
A tube is attached to the left hand side of a connector and another tube is connected to the opposite face. Water enters the system from the left tube, flows freely through the connector, and exits via the right hand tube. At which opening is the water velocity the greatest?
Question 2 - Assembling Objects
"Look at the individual pieces shown above. Which of the answer choices below shows how these pieces fit together to form a complete shape?
Look at the following image of the given puzzle pieces:
In solving that kind of question, begin by counting the number of pieces in each answer choice and eliminating any answer that does not contain the same number. In this case all answers contain 5 pieces, as the question, so it is of no use here. Then you can look at the answer choices and search for unique shapes to see if they appear in the question, as well. For instance, answer choice B contains an obtuse triangle that does not appear in the question and is therefore eliminated. Answer choice D contains two quadrangles which clearly do not appear in the question.
Choosing between answer choices A and C is trickier, but by looking closely at answer C we can see that the small isosceles trapezoid on the left corner does not appear in the question. Therefore, only answer A remains.
Question 3 - Mathematical Usage
Please choose the correct answer. If none of the options is the correct answer please choose answer choice e, "N".
189 gallons = ? hogsheads
Question 4 - Reading Comprehension
Try answering this question in 50 seconds. That's how long you'll have during the test.
The most important and continually emerging factor for financial firms to operate successfully in extended global markets is their ability to efficiently serve discerning, highly sophisticated, better educated, and more powerful consumers addicted to the ease and speed of technology. Financial firms that do not realize the importance of these customer-oriented traits are wasting their resources and will eventually perish. Businesses that fail to recognize the impact of these consumer-driven transformations will struggle to survive or cease to exist in a newly forged global financial service community that has been forever changed by deregulation.
Companies should not perish if they recognize which of the following consumer traits?
Mass Test Prep Course - What's Inside?
What’s Inside Our EEI MASS Test PrepPack
Using our EEI MASS Test PrepPack, you get:
- A full MASS Diagnostic Test (20 questions) that maps your starting point across all four sections - identifying exactly where you need to focus before you spend a single minute on targeted practice. Built to match the real test structure so your baseline score is meaningful, not generic.
- 11 section-specific practice tests covering every area the MASS examines - 4 Assembling Objects tests (65 questions), 3 Mathematical Usage tests (49 questions), 2 Mechanical Concepts simulations (88 questions), and 2 Reading Comprehension simulations (72 questions). Each test is timed and formatted to match actual MASS conditions, so the real assessment feels familiar when it counts.
- 34 additional practice tests for deeper reinforcement - 21 supplemental Mechanical & Electrical Concepts tests and 13 supplemental Reading Comprehension tests, for candidates who want extra reps beyond the core EEI-format simulations.
- 3 comprehensive study guides plus a video tutorial covering the full scope of MASS content - the spatial reasoning, mechanical and electrical principles, and verbal reasoning strategies the test expects from maintenance and skilled trades candidates. Clear explanations and worked examples, not just answer keys.
- Detailed step-by-step explanations for every question, teaching you the reasoning behind each solution so you build genuine understanding across Mechanical Concepts, Assembling Objects, Mathematical Usage, and Reading Comprehension - not just pattern recognition.
- A proven platform founded in 1992 that has helped thousands of candidates prepare for and pass their assessments at Duke Energy, Entergy, Georgia Power, FirstEnergy, PSEG, TVA, and major electric utilities across the United States.
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At JobTestPrep, we've helped thousands of candidates pass competitive hiring assessments since 1992. Our materials are designed by psychometric experts and updated based on real candidate feedback to reflect the latest test formats.
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Video - Introduction to the EEI Tests
MASS Test FAQ's
Most utility companies enforce a waiting period of 30-90 days between attempts and limit candidates to 2 attempts within a 12-month period, though exact policies vary by employer. Entergy, for example, enforces a strict 30-day waiting period with a 2-attempt annual limit. Check directly with your employer's HR department for their specific retake policy before scheduling.
There is no universal passing score for the MASS test. Each utility sets its own cutoff independently, and most employers report results simply as "Recommended" or "Not Recommended" rather than sharing the exact index number - so in most cases you will be told whether you passed, not what you scored. The MASS is graded on an index of 0-15, with higher scores reflecting a stronger predicted likelihood of success in the role.
On score transfers: yes, it is possible in some cases. Several utilities - including Entergy (jobs.entergy.com) and Arkansas Electric (aecc.com) - allow candidates to submit a completed EEI Authorization to Release form to have a previous score transferred from another company, avoiding the need to retest. This is handled directly between the two employers, and is not guaranteed - if the previous score cannot be confirmed within a set timeframe, the new employer may still require you to test.
Both of these factors reinforce the same point: since you will not know your exact score, and since a passing result at one company may not meet the cutoff at another, your best position is always the highest score possible on your first attempt.
No, but they are closely related. Both are EEI pre-employment assessments for power plant roles and share some sections - Mechanical Concepts, Mathematical Usage, and Reading Comprehension. The key difference is the fourth section: the MASS uses Assembling Objects (for maintenance roles), while the POSS uses Figural Reasoning (for plant operators). Some utilities administer both tests together in a single session. You can find official test information at eei.org.
No. The MASS test is a proctored, paper-and-pencil assessment - it is not available online. It is administered directly by the hiring utility or at an approved third-party testing center, depending on the employer. Candidates are typically invited to test after an initial application review. For location and scheduling details, contact the HR department of the utility you are applying to.
The MASS test is a timed, section-by-section assessment - and time pressure is where most candidates struggle. The Mathematical Usage section gives you just 7 minutes to answer 18 questions, roughly 23 seconds per question. Each section is administered separately with its own clock, meaning you cannot borrow unused time from Reading Comprehension to offset a slow start in Mechanics. A static PDF can familiarize you with question types, but it cannot replicate this pressure. Preparing with a timed simulation - one that mirrors the actual section structure, question format, and per-section time limits - is the only way to train your pacing before the real test. JobTestPrep's MASS PrepPack is built specifically for this: full-length timed practice tests, section-by-section performance tracking, and detailed answer explanations so you understand not just what you got wrong, but why.
Yes, JobTestPrep offers free MASS test sample questions on this page covering all four sections, Mechanical Concepts, Assembling Objects, Mathematical Usage, and Reading Comprehension, so you can see the real question format before you buy. For full-length timed simulations, section-by-section practice, and detailed answer explanations, the complete EEI MASS practice test is available in the MASS exam available for purchase from this page.
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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