EPA 608 HVAC Certification Exam Prep 2026
| Real Practice Questions, Answers &
Detailed Rationales | Core, Type I, II & III
Refrigerant Handling Study Guide for EPA
Licensing Success
• This study guide contains 200 carefully crafted EPA 608 practice questions
covering Core, Type I, Type II, and Type III sections — each with five answer choices,
a clearly marked correct answer, and a detailed EXPERT RATIONALE to reinforce
understanding.
• To get the most out of this material, read each question carefully, select your
answer mentally before checking the highlighted correct option, then study the
EXPERT RATIONALE to understand the why behind every answer.
EPA 608 HVAC CERTIFICATION EXAM PREP 2026
Real Practice Questions, Answers & Detailed EXPERT RATIONALE
Core | Type I | Type II | Type III — Refrigerant Handling Study Guide
SECTION 1: CORE — ENVIRONMENTAL IMPACT & REGULATIONS
1. What is the primary reason refrigerants are regulated under the Clean Air
Act?
A. They are highly flammable
B. They are too expensive to waste
C. They deplete the stratospheric ozone layer and contribute to global warming
D. They cause acid rain
E. They contaminate groundwater
CORRECT ANSWER: C. They deplete the stratospheric ozone layer and
contribute to global warming
, EXPERT RATIONALE: The Clean Air Act, specifically Section 608, was enacted to
regulate refrigerants because CFCs and HCFCs destroy the stratospheric ozone
layer, which protects Earth from harmful UV radiation. Many refrigerants also have
high global warming potential (GWP), making their release doubly harmful to the
environment.
2. Which international agreement first called for the phase-out of ozone-
depleting substances?
A. The Paris Agreement
B. The Kyoto Protocol
C. The Geneva Convention
D. The Montreal Protocol
E. The Stockholm Convention
CORRECT ANSWER: D. The Montreal Protocol
EXPERT RATIONALE: The Montreal Protocol, signed in 1987, is the international
treaty that established the global phase-out schedule for ozone-depleting
substances (ODS), including CFCs and HCFCs. It remains one of the most successful
environmental agreements in history.
3. What does ODP stand for in refrigerant terminology?
A. Ozone Depletion Potential
B. Overall Decomposition Point
C. Outdoor Design Parameter
D. Organic Degradation Process
E. Ozone Detection Percentage
CORRECT ANSWER: A. Ozone Depletion Potential
, EXPERT RATIONALE: ODP (Ozone Depletion Potential) is a measure of how
much a substance can destroy stratospheric ozone relative to CFC-11, which has an
ODP of 1.0. Refrigerants with higher ODP values are more harmful to the ozone
layer.
4. Which refrigerant has the highest ozone depletion potential?
A. R-134a
B. R-410A
C. R-11
D. R-22
E. R-404A
CORRECT ANSWER: C. R-11
EXPERT RATIONALE: R-11 (CFC-11 or trichlorofluoromethane) has an ODP of
1.0, which is used as the reference baseline. It contains three chlorine atoms per
molecule, making it one of the most potent ozone-depleting refrigerants ever
produced.
5. What does GWP stand for?
A. Gas Weight Parameter
B. Global Warming Potential
C. General Waste Protocol
D. Greenhouse Waste Percentage
E. Gas Waste Prevention
CORRECT ANSWER: B. Global Warming Potential
EXPERT RATIONALE: GWP (Global Warming Potential) measures how much
heat a greenhouse gas traps in the atmosphere over a specific time period relative
, to CO₂, which has a GWP of 1. Refrigerants like R-404A have very high GWPs
(around 3,922), making their release extremely harmful to climate.
6. Who is required to be certified under EPA Section 608?
A. Only HVAC business owners
B. Any technician who purchases refrigerant in containers over 2 lbs
C. Any technician who maintains, services, repairs, or disposes of appliances
containing regulated refrigerants
D. Only technicians working on commercial systems
E. Only technicians handling R-22
CORRECT ANSWER: C. Any technician who maintains, services, repairs, or
disposes of appliances containing regulated refrigerants
EXPERT RATIONALE: EPA Section 608 requires certification for any technician
who works with appliances containing regulated refrigerants during maintenance,
service, repair, or disposal. This broad definition covers virtually all HVAC/R
technicians working in the field.
7. Which of the following refrigerants is classified as a CFC?
A. R-22
B. R-134a
C. R-12
D. R-410A
E. R-32
CORRECT ANSWER: C. R-12
EXPERT RATIONALE: R-12 (dichlorodifluoromethane) is a chlorofluorocarbon
(CFC). CFCs contain only carbon, chlorine, and fluorine atoms, and are the most
| Real Practice Questions, Answers &
Detailed Rationales | Core, Type I, II & III
Refrigerant Handling Study Guide for EPA
Licensing Success
• This study guide contains 200 carefully crafted EPA 608 practice questions
covering Core, Type I, Type II, and Type III sections — each with five answer choices,
a clearly marked correct answer, and a detailed EXPERT RATIONALE to reinforce
understanding.
• To get the most out of this material, read each question carefully, select your
answer mentally before checking the highlighted correct option, then study the
EXPERT RATIONALE to understand the why behind every answer.
EPA 608 HVAC CERTIFICATION EXAM PREP 2026
Real Practice Questions, Answers & Detailed EXPERT RATIONALE
Core | Type I | Type II | Type III — Refrigerant Handling Study Guide
SECTION 1: CORE — ENVIRONMENTAL IMPACT & REGULATIONS
1. What is the primary reason refrigerants are regulated under the Clean Air
Act?
A. They are highly flammable
B. They are too expensive to waste
C. They deplete the stratospheric ozone layer and contribute to global warming
D. They cause acid rain
E. They contaminate groundwater
CORRECT ANSWER: C. They deplete the stratospheric ozone layer and
contribute to global warming
, EXPERT RATIONALE: The Clean Air Act, specifically Section 608, was enacted to
regulate refrigerants because CFCs and HCFCs destroy the stratospheric ozone
layer, which protects Earth from harmful UV radiation. Many refrigerants also have
high global warming potential (GWP), making their release doubly harmful to the
environment.
2. Which international agreement first called for the phase-out of ozone-
depleting substances?
A. The Paris Agreement
B. The Kyoto Protocol
C. The Geneva Convention
D. The Montreal Protocol
E. The Stockholm Convention
CORRECT ANSWER: D. The Montreal Protocol
EXPERT RATIONALE: The Montreal Protocol, signed in 1987, is the international
treaty that established the global phase-out schedule for ozone-depleting
substances (ODS), including CFCs and HCFCs. It remains one of the most successful
environmental agreements in history.
3. What does ODP stand for in refrigerant terminology?
A. Ozone Depletion Potential
B. Overall Decomposition Point
C. Outdoor Design Parameter
D. Organic Degradation Process
E. Ozone Detection Percentage
CORRECT ANSWER: A. Ozone Depletion Potential
, EXPERT RATIONALE: ODP (Ozone Depletion Potential) is a measure of how
much a substance can destroy stratospheric ozone relative to CFC-11, which has an
ODP of 1.0. Refrigerants with higher ODP values are more harmful to the ozone
layer.
4. Which refrigerant has the highest ozone depletion potential?
A. R-134a
B. R-410A
C. R-11
D. R-22
E. R-404A
CORRECT ANSWER: C. R-11
EXPERT RATIONALE: R-11 (CFC-11 or trichlorofluoromethane) has an ODP of
1.0, which is used as the reference baseline. It contains three chlorine atoms per
molecule, making it one of the most potent ozone-depleting refrigerants ever
produced.
5. What does GWP stand for?
A. Gas Weight Parameter
B. Global Warming Potential
C. General Waste Protocol
D. Greenhouse Waste Percentage
E. Gas Waste Prevention
CORRECT ANSWER: B. Global Warming Potential
EXPERT RATIONALE: GWP (Global Warming Potential) measures how much
heat a greenhouse gas traps in the atmosphere over a specific time period relative
, to CO₂, which has a GWP of 1. Refrigerants like R-404A have very high GWPs
(around 3,922), making their release extremely harmful to climate.
6. Who is required to be certified under EPA Section 608?
A. Only HVAC business owners
B. Any technician who purchases refrigerant in containers over 2 lbs
C. Any technician who maintains, services, repairs, or disposes of appliances
containing regulated refrigerants
D. Only technicians working on commercial systems
E. Only technicians handling R-22
CORRECT ANSWER: C. Any technician who maintains, services, repairs, or
disposes of appliances containing regulated refrigerants
EXPERT RATIONALE: EPA Section 608 requires certification for any technician
who works with appliances containing regulated refrigerants during maintenance,
service, repair, or disposal. This broad definition covers virtually all HVAC/R
technicians working in the field.
7. Which of the following refrigerants is classified as a CFC?
A. R-22
B. R-134a
C. R-12
D. R-410A
E. R-32
CORRECT ANSWER: C. R-12
EXPERT RATIONALE: R-12 (dichlorodifluoromethane) is a chlorofluorocarbon
(CFC). CFCs contain only carbon, chlorine, and fluorine atoms, and are the most
