Free CAST Test Practice — Utility Apprenticeship Aptitude (EEI)
Math, mechanical concepts, sequences, and reading — the four sections utility companies use to screen lineman and electrical apprenticeship applicants.
Built for utility company apprenticeship applicants
What's on the test?
Math & Algebra
5qFractions, percentages, ratios, and applied trade math
Number Sequences
3qFind the pattern and the next number
Reading Comprehension
4qShort passages with questions about the content
Mechanical Reasoning
4qFlow, gears, pulleys, levers, and physical principles
The EEI CAST (Construction and Skilled Trades) test is used by electric utilities like ComEd, PG&E, Con Edison, Duke Energy, and Eversource to screen applicants for lineman, substation technician, and electrical apprenticeship programs. It covers mathematical usage, reading comprehension, mechanical concepts, and figural reasoning. This free practice test mirrors that format — same sections, same difficulty — so you know where you stand before test day.
What is the EEI CAST test?
The EEI CAST (Construction and Skilled Trades) is a standardized aptitude test published by the Edison Electric Institute and used by electric utilities across the United States to screen applicants for construction, lineman, substation, and skilled-trades apprenticeship positions. It measures mathematical usage, reading for understanding, mechanical concepts, and figural reasoning. Scores are used to rank candidates — a higher score moves you further up the list.
What math is on the CAST test?
The mathematical usage section covers basic arithmetic (fractions, decimals, percentages), ratios, basic algebra, and applied calculations utilities care about — power calculations (P = V × I), load factors, ampacity derating, and distance/measurement problems common in line work. A calculator is not allowed, so mental math speed and accuracy matter.
How to prepare for the CAST test
Drill the power formula (P = V × I), percentage calculations, and fraction/ratio problems first — they carry the most weight. For mechanical concepts, review pulley systems, transformer voltage ratios, and how conductor sag behaves with span changes. Read technical passages slowly and answer from what the text says, not general knowledge. Use this free practice test to find your weakest section and focus your study there.
Frequently Asked Questions
Is this an official EEI test?
No — this is a free, unofficial practice test that mirrors the format and content of the EEI CAST. The real CAST is a proprietary exam administered by utilities or their testing vendors. Our questions reflect the actual sections and difficulty so you can prepare effectively.
Which utility companies use the CAST test?
Many major U.S. electric utilities use the EEI CAST or similar EEI assessments, including ComEd, PG&E, Con Edison, Duke Energy, Eversource, Ameren, Entergy, PPL, and others. Always check your target utility's hiring page for the exact assessment they require.
Do I need an account to take this practice test?
No — start instantly, no account required. Enter your email at the end to get your full results and a breakdown of which section to focus on.