220+ Free EPA 608 Practice Questions
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Key Facts: EPA 608 Exam
70%
Passing Score
18/25 per section
84%
Type I Score
21/25 (open-book)
70-80%
Pass Rate
Industry estimate
Never
Expiration
Lifetime certification
Provider-set
Exam Fee
Varies by provider
200+
Practice Questions
OpenExamPrep
EPA Section 608 uses Core plus Type I, Type II, and Type III sections. Closed-book, proctored sections use a 70% minimum; the separate mail-in/open-book Type I route requires 84%. Universal requires all four sections under closed-book, proctored conditions, so an open-book Core cannot carry into Universal. EPA does not publish a national pass rate, and the certification does not expire.
Sample EPA 608 Practice Questions
Try these sample questions to test your EPA 608 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 220+ question experience with AI tutoring.
1What is the primary environmental concern associated with CFC and HCFC refrigerants?
2What three elements make up a CFC (chlorofluorocarbon) refrigerant molecule?
3Which international agreement was established to phase out the production and consumption of ozone-depleting substances?
4What is the main environmental concern with HFC refrigerants?
5What is the Global Warming Potential (GWP) of R-134a compared to carbon dioxide (CO2)?
6Which of the following refrigerants has the highest ozone depletion potential (ODP)?
7Under the Kigali Amendment to the Montreal Protocol, what action are developed countries required to take regarding HFCs?
8What is the purpose of the stratospheric ozone layer?
9Which of the following is considered a "natural refrigerant" with zero ozone depletion potential and very low global warming potential?
10What is the relationship between chlorine content in a refrigerant and its ozone depletion potential?
About the EPA 608 Exam
EPA Section 608 certification is required for technicians who maintain, service, repair, or dispose of stationary appliances containing regulated refrigerants. The assessment has Core plus Type I, Type II, and Type III sections; passing Core with one or more type sections determines the certification earned, while passing all four under closed-book, proctored conditions earns Universal.
Questions
100 scored questions
Time Limit
Provider-specific; EPA does not publish one nationwide time limit for every approved certifying organization
Passing Score
70% per closed-book, proctored section; 84% for the separate mail-in/open-book Type I route, which cannot be combined into Universal
Exam Fee
Provider-set; verify current fee (EPA / Mainstream Engineering / ESCO Group)
EPA 608 Exam Content Outline
Core
Environmental impacts of CFCs/HCFCs/HFCs, ozone depletion, global warming potential, Clean Air Act, Montreal Protocol, refrigerant types, safety procedures, disposal requirements, record keeping
Type I - Small Appliances
Systems with <5 lbs refrigerant (refrigerators, freezers, window ACs), recovery techniques, system-dependent vs self-contained equipment, DOT-approved containers, mailing requirements
Type II - High Pressure
R-22, R-410A, R-404A systems, recovery requirements, leak detection and repair, evacuation levels (10" Hg, 15" Hg), leak rate thresholds, chronically leaking appliances
Type III - Low Pressure
R-11, R-123 chillers, recovery requirements, evacuation levels (25" Hg), water heating during recovery, centrifugal compressors, leak repair requirements
How to Pass the EPA 608 Exam
What You Need to Know
- Passing score: 70% per closed-book, proctored section; 84% for the separate mail-in/open-book Type I route, which cannot be combined into Universal
- Exam length: 100 questions
- Time limit: Provider-specific; EPA does not publish one nationwide time limit for every approved certifying organization
- Exam fee: Provider-set; verify current fee
Keys to Passing
- Work through all 220 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
EPA 608 Study Tips from Top Performers
Frequently Asked Questions
What is the passing score for EPA 608 certification?
The standard minimum is 70% for each closed-book, proctored section. A separate mail-in/open-book Type I route requires 84%. Core is required with each type, and Universal requires Core plus Types I, II, and III all passed closed-book and proctored.
Does EPA 608 certification expire?
No, EPA Section 608 certification never expires. Once you pass the exam, you are certified for life. However, the industry and regulations do change, so many technicians choose to retake training periodically to stay current with new refrigerants and equipment.
What is the difference between Type I, II, III, and Universal certification?
Type I covers factory-sealed small appliances with 5 lb or less of refrigerant, Type II covers medium-, high-, and very-high-pressure appliances, and Type III covers low-pressure appliances. Universal requires Core plus all three types under closed-book, proctored conditions and covers all Section 608 stationary-appliance types.
What are the evacuation requirements for different system types?
For recovery equipment manufactured on or after November 15, 1993, high-pressure appliances below 200 lb must reach 0 in Hg and those at or above 200 lb must reach 10 in Hg; older equipment uses 0 and 4 in Hg respectively. Very-high-pressure appliances use 0 in Hg, while low-pressure appliances use 25 mm Hg absolute.
What is a chronically leaking appliance?
Under Part 82, an appliance with 50 lb or more of ozone-depleting refrigerant that loses at least 125% of its full charge in a calendar year is chronically leaking and must be reported. Part 84 separately governs covered HFC and substitute appliances beginning in 2026.
What recovery equipment can be used on small appliances?
Small-appliance recovery must reach 90% when the compressor operates, 80% when it does not, or a 4 in Hg vacuum. System-dependent equipment is prohibited above a 15 lb charge unless it is a permanently attached pump-out unit.
Can I take the Type I exam online?
EPA permits a mail-in/open-book Type I route with an 84% passing score. Its open-book Core cannot count toward Type II, Type III, or Universal. Universal requires all four sections closed-book and proctored; approved providers may offer remote proctoring.