EEI POSS Practice Test 2026 — Free EEI POSS Exam Prep Questions
POSS is the Edison Electric Institute aptitude battery that utilities use to select power plant operators, from auxiliary and turbine operators to control room operators in fossil, nuclear and hydro plants. Our practice set covers all four POSS components: reading operator manuals, mechanical concepts, mathematical usage (formula conversion, algebra and word problems) and figural reasoning.
The floor of a round tank is 10 feet across. What is its area in square feet? [Area of a circle = 3.14 × r², where r = ½ of the distance across]
EEI POSS format, scoring & key facts
Given by the hiring utility to applicants for power plant operator jobs in fossil, nuclear and hydro plants. There are two alternate batteries that differ slightly in content and time; the battery for nuclear jobs differs somewhat from the one used only for non-nuclear jobs. The full battery takes about two hours. No study aids are allowed. The tests are not adaptive.
| Test battery | EEI Plant Operator Selection System (POSS), testing brochure © 2001, revised October 2015 |
|---|---|
| Tests | Reading Comprehension (36 Q, 30 min), Mechanical Concepts (44 Q, 20 min), Mathematical Usage (18 Q in 7 min or 46 Q in 17 min), Figural Reasoning (20 Q, 10 min) |
| Answer choices | Mechanical Concepts 3; Mathematical Usage 5 (a–d plus N) |
| Total time | About 2 hours (about 3 hours when given together with MASS) |
| Alternate batteries | Two, differing slightly in content and time; the nuclear battery differs from the non-nuclear one |
| Scoring | Number right with no guessing penalty, combined into an Aptitude Index of 0–15 |
| Cutoff | Set by each employer |
| Study aids | Not allowed; formulas and conversions needed for Mathematical Usage are provided |
Facts last verified Oct 18, 2026. Source: lge-ku.com/sites/default/files/documents/EEI_POSS_Brochure.pdf. Always confirm details with EEI before your exam.
When can you take the EEI POSS?
There are no national test dates. Employers schedule testing after you apply for a position that requires POSS.
Plan backwards from your exam date
What the EEI POSS covers
Every PrepBanq EEI POSS test mirrors the official domain weights.
Domain distribution
% of the exam| Content domain | Weight | Our practice questions |
|---|---|---|
Reading Comprehension36 questions on five passages like power plant operator training and safety manuals: details, purpose of a step, main idea, word meaning in context and inferences. | 28% | 41 questions → |
Mechanical Concepts44 picture-based questions with three answers on cylinders and pistons, valves and piping, tank pressure, heat, gears, belts, pulleys, levers and beams. | 34% | 51 questions → |
Mathematical UsageOne of two versions: 18 conversion and formula questions using information given at the start, or 46 questions on formula conversion, algebra and word problems. Answer choices include N. | 23% | 35 questions → |
Figural Reasoning20 picture-pattern questions: Picture Series, Picture Comparison and Picture Progression. | 15% | 23 questions → |
How to register for the EEI POSS
Retake policy
Set by each employer. For example, LG&E-KU does not allow a retake of the same test within 90 days; Entergy requires at least 30 days between attempts and allows no more than two in 12 months.
Score release
Set by each employer; Entergy, for example, says results are typically available within five business days.
Credential renewal
Some employers accept a previously passed EEI test taken with another company through an EEI Authorization to Release form.
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EEI POSS FAQ
How long is the EEI POSS exam?
Testing time for the EEI POSS is 2 hours.
What is the passing score for the EEI POSS?
EEI POSS passing standard: No universal pass mark: the test scores are combined into an Aptitude Index from 0 to 15, and each company sets its own requirements. Score range: Aptitude Index 0–15.
How much does the EEI POSS cost?
The EEI POSS registration fee is There is no public registration: the test is given by the employer to applicants for a position. Check the official site for current fees before you register.
What is on the EEI POSS?
The EEI POSS covers Reading Comprehension (about 28%), Mechanical Concepts (about 34%), Mathematical Usage (about 23%), Figural Reasoning (about 15%).
Who administers the EEI POSS?
The EEI Plant Operator Selection System (POSS) is administered by EEI. Delivery: Given by the hiring utility to applicants for power plant operator jobs in fossil, nuclear and hydro plants. There are two alternate batteries that differ slightly in content and time; the battery for nuclear jobs differs somewhat from the one used only for non-nuclear jobs. The full battery takes about two hours. No study aids are allowed. The tests are not adaptive..
Can you retake the EEI POSS?
Set by each employer. For example, LG&E-KU does not allow a retake of the same test within 90 days; Entergy requires at least 30 days between attempts and allows no more than two in 12 months.
Is there a free EEI POSS practice test?
Yes. PrepBanq has 15 free EEI POSS practice tests with 150 exam-style questions in the real EEI POSS formats, and every answer is explained. No credit card is needed.
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