SkillCat EPA 608 HVAC Certification
Practice Exam (2026 Update) Complete 150-
Q&A Guide with Rationales | Verified
Answers & A+ Guide
Core Section (Questions 1-50)
1. What is the primary purpose of the Clean Air Act (CAA)
regarding HVAC?
A. To set energy efficiency standards for appliances
B. To phase out the production and use of ozone-depleting
substances
C. To regulate the disposal of general construction waste
D. To establish safety standards for high-pressure systems
Answer: B. To phase out the production and use of ozone-
depleting substances
Rationale: The Clean Air Act, specifically Title VI, mandates the
phase-out of substances that deplete the stratospheric ozone layer,
such as CFCs and HCFCs.
2. What is the Montreal Protocol?
A. A Canadian safety standard for refrigerant handling
B. An international treaty to phase out ozone-depleting substances
C. A federal law governing refrigerant sales
D. A certification program for HVAC technicians
Answer: B. An international treaty to phase out ozone-depleting
substances
Rationale: The Montreal Protocol is a global environmental
,agreement ratified by many countries to protect the ozone layer by
phasing out the production and consumption of ODS.
3. What does ozone in the stratosphere do?
A. Traps heat near the earth's surface
B. Forms smog in urban areas
C. Protects the earth from harmful ultraviolet (UV) radiation
D. Contributes to global warming
Answer: C. Protects the earth from harmful ultraviolet (UV)
radiation
Rationale: Stratospheric ozone absorbs most of the sun's harmful
UV-B radiation, preventing it from reaching the earth's surface.
4. Which refrigerant is a CFC?
A. R-134a
B. R-410A
C. R-12
D. R-22
Answer: C. R-12
Rationale: R-12 (dichlorodifluoromethane) is a Chlorofluorocarbon
(CFC). R-22 is an HCFC, and R-134a and R-410A are HFCs.
5. What does the ozone depletion potential (ODP) of a refrigerant
indicate?
A. Its toxicity level
B. Its global warming potential
C. Its ability to damage the ozone layer relative to R-11
D. Its flammability rating
,Answer: C. Its ability to damage the ozone layer relative to R-11
Rationale: ODP is a relative measure of how much damage a
chemical can cause to the ozone layer, with R-11 having an ODP of
1.0.
**6. According to the EPA, what is the maximum allowable leak
rate for commercial refrigeration systems with a 50-pound charge?
A. 15%
B. 20%
C. 25%
D. 35%
Answer: D. 35%
Rationale: For commercial refrigeration systems (e.g.,
supermarkets), the annual leak rate threshold for triggering a
retrofit or retirement is 35%.
7. Which type of refrigerant has the highest ozone depletion
potential?
A. HFOs
B. HFCs
C. HCFCs
D. CFCs
Answer: D. CFCs
Rationale: CFCs (Chlorofluorocarbons) contain chlorine and no
hydrogen, making them highly stable and causing the most
damage to the ozone layer.
8. What is the penalty for knowingly releasing a refrigerant during
the course of service or repair?
A. A warning for a first offense
, B. A fine of up to $44,539 per day per violation
C. Mandatory jail time
D. Suspension of the technician's certification
Answer: B. A fine of up to $44,539 per day per violation
Rationale: The EPA can impose significant fines for knowingly
venting refrigerants, currently up to $44,539 per day for each
violation.
9. When is it legal to release a substitute refrigerant like R-410A
into the atmosphere?
A. During system maintenance
B. Never
C. When the system is being decommissioned
D. If the refrigerant is not an ozone-depleting substance
Answer: B. Never
Rationale: The Clean Air Act prohibits the knowing venting of any
refrigerant, including HFCs and HFOs (substitutes), during the
service, repair, or disposal of appliances.
10. What does a Section 608 technician certification allow you to
do?
A. Sell any type of refrigerant
B. Purchase and handle refrigerants
C. Design HVAC systems
D. Operate a recycling facility
Answer: B. Purchase and handle refrigerants
Rationale: EPA Section 608 certification is required for technicians
who maintain, service, repair, or dispose of appliances that contain
refrigerants.
Practice Exam (2026 Update) Complete 150-
Q&A Guide with Rationales | Verified
Answers & A+ Guide
Core Section (Questions 1-50)
1. What is the primary purpose of the Clean Air Act (CAA)
regarding HVAC?
A. To set energy efficiency standards for appliances
B. To phase out the production and use of ozone-depleting
substances
C. To regulate the disposal of general construction waste
D. To establish safety standards for high-pressure systems
Answer: B. To phase out the production and use of ozone-
depleting substances
Rationale: The Clean Air Act, specifically Title VI, mandates the
phase-out of substances that deplete the stratospheric ozone layer,
such as CFCs and HCFCs.
2. What is the Montreal Protocol?
A. A Canadian safety standard for refrigerant handling
B. An international treaty to phase out ozone-depleting substances
C. A federal law governing refrigerant sales
D. A certification program for HVAC technicians
Answer: B. An international treaty to phase out ozone-depleting
substances
Rationale: The Montreal Protocol is a global environmental
,agreement ratified by many countries to protect the ozone layer by
phasing out the production and consumption of ODS.
3. What does ozone in the stratosphere do?
A. Traps heat near the earth's surface
B. Forms smog in urban areas
C. Protects the earth from harmful ultraviolet (UV) radiation
D. Contributes to global warming
Answer: C. Protects the earth from harmful ultraviolet (UV)
radiation
Rationale: Stratospheric ozone absorbs most of the sun's harmful
UV-B radiation, preventing it from reaching the earth's surface.
4. Which refrigerant is a CFC?
A. R-134a
B. R-410A
C. R-12
D. R-22
Answer: C. R-12
Rationale: R-12 (dichlorodifluoromethane) is a Chlorofluorocarbon
(CFC). R-22 is an HCFC, and R-134a and R-410A are HFCs.
5. What does the ozone depletion potential (ODP) of a refrigerant
indicate?
A. Its toxicity level
B. Its global warming potential
C. Its ability to damage the ozone layer relative to R-11
D. Its flammability rating
,Answer: C. Its ability to damage the ozone layer relative to R-11
Rationale: ODP is a relative measure of how much damage a
chemical can cause to the ozone layer, with R-11 having an ODP of
1.0.
**6. According to the EPA, what is the maximum allowable leak
rate for commercial refrigeration systems with a 50-pound charge?
A. 15%
B. 20%
C. 25%
D. 35%
Answer: D. 35%
Rationale: For commercial refrigeration systems (e.g.,
supermarkets), the annual leak rate threshold for triggering a
retrofit or retirement is 35%.
7. Which type of refrigerant has the highest ozone depletion
potential?
A. HFOs
B. HFCs
C. HCFCs
D. CFCs
Answer: D. CFCs
Rationale: CFCs (Chlorofluorocarbons) contain chlorine and no
hydrogen, making them highly stable and causing the most
damage to the ozone layer.
8. What is the penalty for knowingly releasing a refrigerant during
the course of service or repair?
A. A warning for a first offense
, B. A fine of up to $44,539 per day per violation
C. Mandatory jail time
D. Suspension of the technician's certification
Answer: B. A fine of up to $44,539 per day per violation
Rationale: The EPA can impose significant fines for knowingly
venting refrigerants, currently up to $44,539 per day for each
violation.
9. When is it legal to release a substitute refrigerant like R-410A
into the atmosphere?
A. During system maintenance
B. Never
C. When the system is being decommissioned
D. If the refrigerant is not an ozone-depleting substance
Answer: B. Never
Rationale: The Clean Air Act prohibits the knowing venting of any
refrigerant, including HFCs and HFOs (substitutes), during the
service, repair, or disposal of appliances.
10. What does a Section 608 technician certification allow you to
do?
A. Sell any type of refrigerant
B. Purchase and handle refrigerants
C. Design HVAC systems
D. Operate a recycling facility
Answer: B. Purchase and handle refrigerants
Rationale: EPA Section 608 certification is required for technicians
who maintain, service, repair, or dispose of appliances that contain
refrigerants.
