EPA 608 Passing Score: How Many Questions You Need to Pass Each Section

The EPA 608 passing score is 72% on each section, and each section must reach that threshold independently. A high score in Core does not compensate for a failing score in Type II. All four sections have 25 questions, so you need 18 correct in each. This page details the threshold, how scoring works for Universal certification, and what happens if you fail one or more sections.

EPA 608 Passing Score by Section

Each section of the EPA 608 exam requires 72% (18 of 25) to pass. Sections are scored independently, so you must reach the threshold in each section you take. For Universal certification, all four sections must pass independently.

How EPA 608 Exam Scoring Works

Each question is worth equal weight. No partial credit is awarded. Unanswered questions count as wrong. Every section has 25 questions, so the math is the same across Core, Type I, Type II, and Type III: 18 correct (72%) is the minimum pass, and missing 8 or more (17 of 25 = 68%) fails.

What Happens If You Fail One Section

• Failed sections must be retaken at the provider's per-section retake fee ($10–$30 at most providers)
• Sections you passed are retained — you do not retake the entire Universal exam
• No mandatory waiting period — most providers allow retake scheduling within days
• Some providers allow retaking on the same day if testing slots are available

How Score Reports Work

Online proctored exams (ESCO Institute, Mainstream Engineering, SkillCat) display results immediately after you submit each section. The score report shows the number correct per section and pass/fail status for each. Paper-based exams have results mailed within 2–4 weeks. See our EPA 608 exam results guide for details on certification card processing and temporary pass sheets.

How to Reach the Passing Score on Every Section

Core: The most-failed section. Focus on Section 608 statutory language, civil penalty dollar amounts (over $44,539 per day per violation), refrigerant venting prohibitions, and technician certification categories. Practice questions that test regulatory specifics, not HVAC field knowledge.

Type I: Narrower scope. Focus on recovery requirements for small appliances, evacuation levels, and safe disposal procedures for equipment with less than 5 lbs of refrigerant.

Type II: Second most-failed section. Focus on high-pressure refrigerant pressure-temperature relationships, leak rate thresholds for commercial refrigeration (20% per year) and comfort cooling (10% per year), and R-410A system characteristics.

Type III: Focus on low-pressure system operating characteristics, R-11 properties, purging procedures, and pressure-temperature relationships for centrifugal chillers.

Section-by-Section Content and Strategy

Core Section (25 Questions, Pass: 18/25)

The Core section is mandatory for all certification types — it tests your knowledge of the regulations that apply to every refrigerant-handling technician regardless of equipment type. Common Core exam topics and the knowledge required:

• Clean Air Act Section 608 requirements — who must be certified, what activities require certification, purchase restrictions on refrigerant containers
• Venting prohibition — no intentional venting of regulated refrigerants; the de minimis exemption applies only to releases "during normal course of maintenance" that are "not in excess of the de minimis amount"
• Civil penalties — up to $44,539 per day per violation (know the dollar figure; this is a heavily tested number)
• Refrigerant safety classifications — A1, A2, A2L, B2L toxicity/flammability ratings; ozone depletion potential (ODP) vs global warming potential (GWP)
• Recovery requirements — system-dependent vs active recovery; equipment certification; cylinder requirements
• Record-keeping obligations — service records for systems above leak reporting thresholds, refrigerant sales records for wholesalers

Type I Section (25 Questions, Pass: 18/25)

Type I covers small appliances — hermetically sealed systems with a manufactured refrigerant charge of 5 lbs or less. The questions are narrower in scope because the equipment category is more limited:

• Definition of a small appliance under Section 608 (hermetically sealed, 5 lbs or less manufactured charge)
• System-dependent recovery — recovering refrigerant using the appliance's own compressor
• Recovery efficiency requirements for small appliances (90% with a working compressor, 80% if the compressor does not work)
• Safe disposal of small appliances — requirements before sending to scrap metal recyclers
• De minimis exception — what counts and what doesn't

Type II Section (25 Questions, Pass: 18/25)

Type II is the most commercially relevant section — it covers high-pressure refrigerants used in the vast majority of residential and commercial HVAC work. Focus areas:

• Pressure-temperature relationships for R-22, R-410A, and R-454B
• Recovery cylinder pressure and fill weight limits
• Leak detection methods and leak rate thresholds: 10%/year for comfort cooling, 20%/year for commercial refrigeration, 30%/year for industrial process refrigeration
• Refrigerant identification — field testing procedures, handling contaminated refrigerant
• Safe charging procedures — superheat and subcooling measurement
• Equipment disposal requirements for high-pressure systems

Type III Section (25 Questions, Pass: 18/25)

Type III covers low-pressure appliances — centrifugal chillers using refrigerants like R-11, R-113, and R-123. These operate at below-atmospheric pressures, which creates a different set of handling considerations:

• Low-pressure system characteristics — sub-atmospheric pressure, high risk of air infiltration
• Purging procedures — how to remove non-condensable gases that infiltrate low-pressure systems
• Rupture disc setpoints — the safety relief device settings for low-pressure equipment
• Economizer cycle operation and purging in centrifugal chillers
• R-123 properties — HCFC, lower ODP than R-11, toxicity considerations

How Many Can You Miss and Still Pass?

Knowing exactly how many questions you can afford to miss reduces exam anxiety and helps you pace your study effort. Here's the full picture:

Every section gives you the same margin: miss up to 7 of 25 and you still pass. Type I is the narrowest in scope (small appliances only) and the easiest to prepare for specifically. A focused Type I review covering system-dependent recovery and the 5-lb charge definition covers most of what the section tests.

Retake Strategy: Which Section to Prioritize

If you fail one or more sections, knowing what each section rewards helps you build an efficient retake study plan:

• Core failures are usually from regulatory specifics — civil penalty amounts, exact venting prohibition language, certification category definitions. Make a flashcard set of specific regulatory facts and numbers.
• Type I failures are usually from not knowing the system-dependent recovery procedure details or the specific recovery efficiency percentages for small appliances.
• Type II failures are often from pressure-temperature relationships and leak threshold percentages — the two most calculation/number-heavy topics in the section.
• Type III failures typically stem from unfamiliarity with centrifugal chiller operation and purging concepts — most HVAC technicians never work with low-pressure systems in the field.

Before retaking, take a full-length practice test on the failed section under timed conditions. This tells you whether you've actually improved enough to pass — versus feeling ready but still being borderline.

EPA 608 Passing Score FAQ