What are the PE Mechanical depth options?

NCEES offers three PE Mechanical depth exams: Machine Design & Materials, Thermal & Fluids Systems, and HVAC & Refrigeration. You choose the one that matches your practice; all are computer-based and offered year-round.

Is the FE required before the PE?

Yes. You pass the FE Mechanical to become an EIT, gain qualifying experience (typically about four years), then sit the PE Mechanical depth exam and apply through your state board.

Are the PE Mechanical exams open book?

They are open-book using an NCEES-supplied searchable reference; the exams are computer-based and time-pressured, so fast reference navigation is important.

Which depth is hardest?

Difficulty is individual — it depends on your background. The best choice is the depth that overlaps your day-to-day work, since you’ll have the strongest intuition and reference familiarity there.

⚙️ PE License & Exam Prep

Mechanical Engineering PE License Exam Prep

Mechanical engineers are licensed through the PE system. This overview covers the FE Mechanical and the three NCEES PE Mechanical depth exams — Machine Design & Materials, Thermal & Fluids Systems, and HVAC & Refrigeration — and how to choose between them.

⚠️ Requirements, fees and exam details vary by state, jurisdiction and over time. Always confirm the current specifics with NCEES or the relevant board before you apply.

🧭

The credential landscape

The path is FE Mechanical → ~4 years of qualifying experience → a PE Mechanical depth exam → state-board licensure. NCEES offers three depth areas; you pick the one that matches your practice. All are computer-based and offered year-round.

Mechanical PE path

1Earn an ABET mechanical degree
2Pass the FE Mechanical → EIT
3Gain ~4 years of qualifying experience under a PE
4Pass a PE Mechanical depth exam
5Apply to your state board → Professional Engineer

🎓

Engineering licensure (FE & PE Mechanical)

FE Mechanical

PREP COMING SOON

Fundamentals of Engineering — the first step toward the Mechanical PE.

Administered by

NCEES (Pearson VUE)

Format

Computer-based · 110 questions · ~6-hour appointment · year-round

References allowed

Open-book — on-screen NCEES FE Reference Handbook

How you qualify

Typically taken near graduation from an ABET mechanical program. Earns the EIT designation.

Key topics

ThermodynamicsFluid mechanicsHeat transferMechanics of materialsDynamicsMachine designMeasurements

PE Mechanical: Machine Design & Materials

PREP COMING SOON

PE depth for machine design, materials and mechanical systems.

Administered by

NCEES (Pearson VUE)

Format

Computer-based · 80 questions · ~8-hour appointment · year-round

References allowed

Open-book — NCEES-supplied reference

How you qualify

Pass the FE, gain ~4 years of qualifying experience (varies by state), then apply through your state board.

Key topics

Stress analysisFatigue & failureMaterialsJoints & fastenersBearings & gearsVibration

PE Mechanical: Thermal & Fluids Systems

PREP COMING SOON

PE depth for thermodynamics, fluids, heat transfer and energy systems.

Administered by

NCEES (Pearson VUE)

Format

Computer-based · 80 questions · ~8-hour appointment · year-round

References allowed

Open-book — NCEES-supplied reference

How you qualify

Pass the FE, gain ~4 years of qualifying experience (varies by state), then apply through your state board.

Key topics

Thermodynamic cyclesFluid mechanicsHeat transferPumps & turbomachineryPiping systemsEnergy/HVAC fundamentals

PE Mechanical: HVAC & Refrigeration

PREP COMING SOON

PE depth for HVAC and refrigeration system design.

Administered by

NCEES (Pearson VUE)

Format

Computer-based · 80 questions · ~8-hour appointment · year-round

References allowed

Open-book — NCEES-supplied reference (ASHRAE-based)

How you qualify

Pass the FE, gain ~4 years of qualifying experience (varies by state), then apply through your state board.

Key topics

PsychrometricsHeating & cooling loadsAir & hydronic distributionRefrigeration cyclesEquipment & controls

📋

Requirements at a glance

Credential	Prerequisite	Typical experience	Administered by
FE Mechanical	Mechanical coursework	Final-year student / grad	NCEES
PE Mechanical: Machine Design	Pass FE	~4 years under a PE*	NCEES + state board
PE Mechanical: Thermal & Fluids	Pass FE	~4 years under a PE*	NCEES + state board
PE Mechanical: HVAC & Refrigeration	Pass FE	~4 years under a PE*	NCEES + state board

* Experience hours and prerequisites vary significantly by state, jurisdiction and credential level. Figures shown are typical ranges, not legal requirements.

🧠

Exam strategies & study tips

Choose your depth by your daily work

The three PE Mechanical depths share little. Pick the one you actually practice — Machine Design, Thermal & Fluids, or HVAC & Refrigeration — and go deep on its references.

Drill the core problem types

Stress/fatigue, thermodynamic cycles, fluid/piping and heat-transfer problems recur. Build speed with timed sets — and rehearse with the studio’s pipe, pump and heat-exchanger tools.

Study from official references and the current cycle

Use the same edition of the code/handbook the exam is written to, and the certifying body’s official references. Exams are tied to a specific cycle — the wrong edition costs you on lookup questions.

Map the requirements before you study

Confirm the exact education, experience hours and application steps with the certifying body or state board first — missing a prerequisite trips up more people than the exam content does.

🛠️

Practice with the studio's free tools

Many exam questions are calculation problems you can rehearse right now with the free tools in the Mechanical Systems Studio:

Pipe Sizing →Pump Sizing →Heat Exchanger →Pipe Flow Simulator →

← Back to Mechanical Systems Studio