Targeted prep for the EEI Plant Operator Selection System — the four-part battery utilities use to hire power-plant and operator trainees. Try 10 real practice questions below, free.
Straight from our question bank — answer each one and see the step-by-step explanation instantly.
Every book includes free timed online practice tests — no subscription, no repeats between books.
POSS (Plant Operator Selection System) is an Edison Electric Institute battery used by utilities and power companies to screen applicants for plant-operator and operator-trainee roles. It is one of the most common pre-employment tests in the energy industry.
Four: Reading Comprehension, Mathematical Usage, Mechanical Concepts, and Assembly/Figural Reasoning (rotating and arranging shapes). Our book mirrors that mix, with the heaviest weight on math and mechanical reasoning.
The content is not advanced, but it is timed and broad. Most candidates fail on pacing, not difficulty. Practicing all four section types under a clock — which our full-length tests do — is the single best preparation.
Retake windows are set by the hiring utility (often six months). A higher score also improves your ranking against other applicants, so it is worth preparing thoroughly the first time.
A full review of all four sections, figural-reasoning diagrams, 3 full-length practice tests, 180+ questions with explanations, and free timed online practice tests via the access code inside.