New · free YouTube courses

Nineteen full courses now live — the complete TFS, Machine Design & Materials, and HVAC & Refrigeration series, plus the NCEES Mechanical Handbook Deep Dive

220 video lessons · 638 free companion PDFs across Thermodynamics, Fluid Mechanics, Heat Transfer, Pumps & Hydraulics, Power Systems, Supportive Knowledge, Machine Design & Materials, and HVAC & Refrigeration — plus the NCEES Mechanical Handbook Deep Dive through the pages no week’s syllabus covers. Every formula NCEES Handbook 2.0 indexed. Subscribe and like to help the channel grow — every signal moves us up the algorithm.

Browse the courses →Subscribe + Like to support
PE Prep Engine

Sharpen speed, stay organized, and review weak areas without wrestling with a messy question bank. Practice, flashcards, and progress tracking all live in one place.

Timed practiceTagged by disciplineFlashcards from misses
Try 10 free questionsCreate account
Log inSee all features
PE Prep Engine

FE and PE prep

Study like an engineer

Brain + engine
Target the right topic

Filter by exam, discipline, depth area, topic, and subtopic without digging.

Train at exam pace

Switch between untimed drills and timed exam sessions in the same workflow.

Turn misses into review

Generate flashcards from missed questions and keep pressure on weak spots.

Get the cheat sheets as they ship

One email when new lessons and free cheat sheets go live. No spam, one-click unsubscribe. The cheat sheets stay free — always.

Practice tests

Build timed quizzes or focused drills by exam, discipline, and topic.

Flashcards

Reinforce formulas, definitions, and quick procedures with active recall.

Progress tracking

Track accuracy and review missed questions by error type.

Media library

Organize videos and slide decks by exam and discipline.

Free week-one preview by discipline

A full first week of material, no account needed. The question bank spans all of these — Civil is the largest at 1,195 questions.

PE Mechanical — Thermal & FluidsThermodynamics week onePE Mechanical — Machine DesignMaterials & componentsPE Mechanical — HVAC & RefrigerationPsychrometrics week onePE Civil — StructuralLoads & combinationsPE Civil — GeotechnicalSoil mechanics week onePE Civil — ConstructionMeans, methods & schedulingPE Civil — TransportationTraffic engineeringPE Civil — Water ResourcesHydraulics & environmentalPE Electrical — PowerCircuits & machines week oneSE StructuralLoads & combinations review

Built by a working engineer, not a course company

I’m Alan Rathbun, a practicing mechanical engineer at the Hanford Site. I built PE Prep Engine while studying for the PE myself, because the prep courses I looked at cost $1,000–$2,600 and still left me hunting through the NCEES Handbook for the equation I actually needed.

So every lesson here is indexed to the handbook you get on exam day — section and page — and every video, companion PDF and cheat sheet is free. If you find a wrong answer, tell me and I’ll fix it; that has already happened dozens of times, and the corrections ship the same week.