PE exam topics
The engineering itself — the high-yield topics, broken down by where they show up on the exam and where people lose points, with the key relations in plain terms. Organized by depth, the way you'll study. (Looking for guidance on the exam, the license, or how to prepare? That's in Resources.)
HVAC & Refrigeration
Machine Design & Materials
Thermal & Fluid Systems
All depths
Practice these topics — don't just read them.
Reading a topic is the start; the points come from working problems on it. CastorPrep's practice is tagged to every one of these topics, with a grounded AI tutor on each problem.
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