1.2 Exam Format, Scoring, and Administration

EPA 608 Technician Certification Exam

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1 Introduction to EPA 608 Certification

1.1 What EPA 608 Is and Who Needs It 1.2 Exam Format, Scoring, and Administration 1.3 How to Study for EPA 608

2 Regulations and the Clean Air Act

2.1 Clean Air Act Overview 2.2 Penalties and Enforcement 2.3 Montreal Protocol and International Agreements 2.4 AIM Act and HFC Phasedown Schedule 2.5 SNAP Program and Refrigerant Transitions

3 Refrigerants and Ozone Science

3.1 The Science of Ozone Depletion (ODP and GWP) 3.2 Refrigerant Classification, ASHRAE Numbering, and Safety Groups 3.3 Common Refrigerants: Properties, Applications, and Phaseout Status 3.4 Refrigerant Blends: Glide, Fractionation, and Liquid Charging

4 The Refrigeration Cycle

4.1 The Basic Refrigeration Cycle 4.2 System Components in Detail 4.3 Heat Transfer and Pressure-Temperature Relationships

5 Refrigerant Safety and Handling

5.1 Refrigerant Hazards and Health Effects 5.2 Safe Handling Practices, PPE, and Cylinders 5.3 A2L (Mildly Flammable) Refrigerant Safety

6 Recovery, Recycling, and Reclaiming

6.1 The Three Rs: Recover, Recycle, Reclaim 6.2 Recovery Equipment Requirements 6.3 Required Levels of Evacuation 6.4 Refrigerant Sales Restrictions and Recordkeeping

7 Leak Detection and Repair

7.1 Leak Detection Methods 7.2 Leak Repair Requirements and Trigger Rates 7.3 Leak-Rate Calculation, Recordkeeping, and Reporting

8 Type I — Small Appliances

8.1 What Counts as a Small Appliance 8.2 Type I Recovery Requirements 8.3 Type I Procedures, Access Valves, and the Open-Book Exam

9 Type II — High-Pressure Appliances

9.1 What Type II Covers: High-Pressure System Overview 9.2 Type II Recovery Methods and Required Evacuation Levels 9.3 Leak Detection, the Repair Triggers, and Recordkeeping 9.4 The R-22 Phaseout, Retrofits, and the Move to Lower-GWP A2Ls

10 Type III — Low-Pressure Appliances

10.1 Low-Pressure System Fundamentals 10.2 Purge Units and Air Management 10.3 Type III Recovery and Procedures 10.4 Type III Leak Testing

11 10. Disposal, Shipping, and Compliance

11.1 Equipment Disposal Requirements 11.2 Refrigerant Shipping and Transport 11.3 Compliance Checklist and Best Practices

12 Final Review and Exam Strategy

12.1 High-Yield Core Section Review 12.2 Type I vs Type II vs Type III: Side-by-Side Review 12.3 How the Exam Works and Exam-Day Strategy

1.2 Exam Format, Scoring, and Administration

Key Takeaways Explain This Topic AI

Each EPA 608 section has 25 multiple-choice questions; Universal is all four sections, 100 questions total.

The proctored passing score is 70% per section (about 18 of 25 correct), and sections are scored independently.

Type I may be taken open-book in a non-proctored setting, but then requires a higher 84% passing score.

An open-book Core cannot count toward Universal — Core must be passed proctored to earn Type II, III, or Universal.

EPA-approved organizations such as ESCO Group and Mainstream Engineering administer the exam; the certification is permanent and never expires.

Last updated: October 2026

How the Exam Is Built

The EPA 608 exam is modular . It is not one long test but a set of sections that share a common Core. Every certification path starts with the Core section, which covers environmental science, the Clean Air Act regulations, refrigerant safety, and the fundamentals of recovery, recycling, and reclamation. After Core, you take the Type section(s) that match the equipment you want to be authorized for: Type I (small appliances), Type II (medium- through very-high-pressure), and Type III (low-pressure).

Each section contains approximately 25 multiple-choice questions . A candidate pursuing Universal certification answers all four sections — Core + Type I + Type II + Type III — for 100 questions total when taken together. Questions are four-option multiple choice with a single best answer; there is no essay, lab, or hands-on portion.

Exam Structure at a Glance

• Section Focus Approx. Questions Required For
• Core Regulations, ozone/climate science, safety, recovery basics ~25 Every certification type
• Type I Small-appliance recovery and service ~25 Type I and Universal
• Type II High-pressure leak, recovery, evacuation ~25 Type II and Universal
• Type III Low-pressure chiller recovery and service ~25 Type III and Universal
• Universal All four sections combined ~100 Universal certification

The Core is the workhorse: it appears in every path and carries the heaviest concentration of broadly applicable, frequently tested material (venting prohibition, recovery requirements, ozone and GWP science, recordkeeping). For that reason most candidates spend the largest share of study time on Core.

How Sections Are Scored

EPA 608 sections are scored independently — passing or failing one section has no effect on the others. The standard threshold for a proctored section is 70% correct , which on a 25-question section means 18 of 25 . You must clear the threshold on each section you take; there is no averaging across sections to compensate for a weak one.

There is one important exception. Type I may be taken as an open-book exam in a non-proctored setting (for example, an online or mail-in format). When taken that way, the bar rises to 84% because the test-taker has the reference material in hand. The same open-book/proctored distinction matters for Core: a Core taken open-book cannot be used to earn Type II, Type III, or Universal — those require Core to be passed in a proctored, closed-book setting.

Passing-Score Reference

• Setting Passing Score On a 25-Q Section Notes
• Proctored (closed-book) 70% 18 of 25 Standard for Core, Type I, II, III
• Open-book Type I 84% 21 of 25 Non-proctored online/mail-in only
• Open-book Core Not valid for upgrade — Cannot count toward Type II/III/Universal

Example: Mia takes the proctored exam and scores Core 20/25 (80%), Type I 19/25 (76%), Type II 17/25 (68%), Type III 21/25 (84%). She passes Core, Type I, and Type III, but fails Type II (68% is below the 70% threshold). She is not Universal-certified. She is certified for Type I and Type III, and she only needs to retake the Type II section — her passing sections stand. Sections are independent, so a single weak section never erases the rest.

How Universal Is Earned

Universal certification is not a separate test — it is the result of passing Core plus all three Type sections proctored . There is no extra exam and no additional fee beyond taking the sections. Because the Core must be proctored to count toward Universal, Universal may be earned in one proctored sitting or by combining separately passed Core and Type sections, provided every counted examination was closed-book, secure, and proctored. A technician who first earned an open-book Type I and later wants Universal must retake Core (and Type I) in the proctored, closed-book format .

Who Administers the Exam

The EPA does not run the test itself. Instead it approves certifying organizations to administer secure exams using questions drawn from the EPA question bank. The two most widely used administrators are:

ESCO Group (ESCO Institute) — a large EPA-approved organization with a nationwide network of proctor sites and online options.

Mainstream Engineering — an EPA-approved organization well known for online open-book Type I testing and remote-proctored options through its EPAtest.com platform.

Other EPA-approved organizations exist — EPA's list includes RETA-RSES, trade associations, and several schools. All approved providers administer EPA-approved questions, so the content does not meaningfully vary between them — choose based on price, location, and whether you want in-person or remote proctoring.

Retakes and Permanence

If you fail a section, you may retake it — policies vary by provider, but a common model lets you retake only the failed section(s) (or all sections if all were failed), usually for an additional fee. Because sections are independent, you never have to re-pass material you already cleared.

Most importantly, EPA 608 certification is permanent . Once issued, it is valid for the lifetime of the technician — there is no renewal date, no continuing-education requirement, and no expiration under current federal rules. (Technicians still keep up with regulatory changes such as the AIM Act HFC phasedown, but no recertification is mandated.)

• Administration Summary
• Format: multiple-choice, four options, single best answer
• Sections: Core (required) + Type I / II / III, ~25 questions each
• Proctored pass: 70% per section; open-book Type I pass: 84%
• Universal: pass Core + all three Types, proctored
• Administrators: ESCO Group, Mainstream Engineering, and other EPA-approved organizations
• Validity: lifetime — the certification never expires