No charge, but hidden

Where the official CAST practice is

EEI makes practice tests for CAST, available at no charge. You can’t get them from EEI directly: each utility posts a shared login on its own careers page. Here’s where.

Checked against official pages October 24, 2026. Non-official sources are labeled.

Duke Energy ↗
Practice for CAST, POSS, MASS, TECH and SO/PD; Duke notes the practice tests are shorter and differ slightly from the real ones. No practice exists for Duke’s lineworker VAL.
PECO (Exelon) ↗
EEI practice for CAST, TECH and SO/PD.
ComEd (Exelon) ↗
EEI practice tests, which ComEd says are the same format and concepts as the actual tests.
Seattle City Light ↗
CAST brochure, CAST practice test and CAST SkillBuilder.
AEP ↗
EEI test preparation and SkillBuilders.
Ameren ↗
CAST test description; links to EEI practice.

We link the utility pages rather than copy the logins, which belong to those utilities and change. Older logins on some pages may no longer work.

What’s in the official practice

EEI’s CAST-R practice document (2020) contains:

Graphic Arithmetic: one drawing followed by 8 questions, suggested time 15 minutes.
Mechanical Concepts: 26 questions, suggested time 12 minutes.
Reading for Comprehension: 24 questions, suggested time 23 minutes.
Work Preferences Inventory: no practice. EEI says it doesn’t provide practice for tests of work style and behavior.

EEI suggests setting aside a continuous two-hour block and notes the practice tests are “for informational purposes only, and are not a guarantee that an applicant will pass.” Take them timed, once, as a baseline, then again after you’ve worked on what you missed. Mechanical concepts is the section with the least margin: the real test gives about 27 seconds a question.

Where these facts come from · all checked October 24, 2026