EPA 608 Universal HVAC Certification 2026 Updated Exam Questions and
Answers | Complete Refrigerant Recovery and Recycling Study Guide
with Verified Solutions, Detailed Rationales, Core Certification, Type I
Small Appliances, Type II High-Pressure Systems, Type III Low-Pressure
Systems, Leak Detection, EPA Regulations, Ozone Depletion Prevention,
Refrigerant Safety, Recovery Equipment, Clean Air Act Requirements and
HVAC Technician Certification Exam Preparation
Question 1: Which section of the Clean Air Act specifically addresses the
protection of stratospheric ozone?
A. Title IV
B. Title VI
C. Title II
D. Title I
CORRECT ANSWER: B. Title VI
Rationale: Title VI of the Clean Air Act, added by the 1990 amendments, specifically
mandates the phase-out of ozone-depleting substances and establishes regulations for
their handling, recovery, and recycling.
Question 2: What is the primary purpose of recovering refrigerant during HVAC
service?
A. To increase system efficiency
B. To prevent release of refrigerants into the atmosphere
C. To reduce the cost of new refrigerant
D. To clean the internal components of the compressor
CORRECT ANSWER: B. To prevent release of refrigerants into the atmosphere
Rationale: The primary environmental and legal purpose of recovery is to prevent ozone-
depleting substances (ODS) and high global warming potential (GWP) refrigerants from
venting into the atmosphere, which contributes to ozone depletion and climate change.
Question 3: Which type of refrigerant has an Ozone Depletion Potential (ODP) of
zero?
A. CFCs
B. HCFCs
C. HFCs
D. Halons
CORRECT ANSWER: C. HFCs
Rationale: Hydrofluorocarbons (HFCs) do not contain chlorine atoms, which are
responsible for ozone depletion. Therefore, they have an ODP of zero, although they
often have high Global Warming Potentials (GWP).
,Question 4: Under EPA Section 608, it is illegal to knowingly vent which of the
following during maintenance, service, repair, or disposal of appliances?
A. Only CFC refrigerants
B. Only HCFC refrigerants
C. Ozone-depleting refrigerants and their substitutes
D. Nitrogen used for leak testing
CORRECT ANSWER: C. Ozone-depleting refrigerants and their substitutes
Rationale: EPA regulations prohibit the knowing venting of ozone-depleting refrigerants
(CFCs and HCFCs) as well as their non-ozone-depleting substitutes (such as HFCs and
HFOs) during any phase of appliance lifecycle management.
Question 5: What is the maximum allowable leak rate for commercial refrigeration
appliances containing more than 50 pounds of refrigerant under current EPA
regulations?
A. 10% per year
B. 20% per year
C. 30% per year
D. 35% per year
CORRECT ANSWER: B. 20% per year
Rationale: As of recent EPA updates, the leak repair threshold for commercial
refrigeration appliances containing more than 50 pounds of refrigerant is 20% of the
total charge per year. Industrial process refrigeration has a higher threshold, but
standard commercial units are capped at 20%.
Question 6: Which certification type allows a technician to work on small
appliances only?
A. Type I
B. Type II
C. Type III
D. Universal
CORRECT ANSWER: A. Type I
Rationale: Type I certification qualifies technicians to service, maintain, or dispose of
small appliances, which are defined as appliances manufactured, charged, and
hermetically sealed in a factory with 5 pounds or less of refrigerant.
Question 7: What must be done before opening an HVAC system for major repair?
A. The system must be evacuated to 0 psig
B. The refrigerant must be recovered to the required vacuum level
C. The compressor must be removed
D. The system must be flushed with nitrogen
,CORRECT ANSWER: B. The refrigerant must be recovered to the required vacuum
level
Rationale: Before breaking into a system for major repairs, EPA regulations require that
the refrigerant be recovered using approved equipment to specific vacuum levels
depending on the appliance type and size, ensuring minimal release to the atmosphere.
Question 8: Which of the following is considered a "major repair" under EPA
Section 608?
A. Replacing a filter drier
B. Replacing a capacitor
C. Replacement of the compressor, condenser, evaporator, or an auxiliary heat
exchanger coil
D. Adding refrigerant to top off the charge
CORRECT ANSWER: C. Replacement of the compressor, condenser, evaporator, or
an auxiliary heat exchanger coil
Rationale: Major repairs involve the replacement of critical components such as the
compressor, condenser, evaporator, or auxiliary heat exchanger coils. These actions
require strict adherence to recovery and evacuation procedures.
Question 9: What is the required evacuation level for a small appliance with a non-
functioning compressor using active recovery equipment?
A. 0 inches of Hg vacuum
B. 4 inches of Hg vacuum
C. 10 inches of Hg vacuum
D. Atmospheric pressure
CORRECT ANSWER: B. 4 inches of Hg vacuum
Rationale: For small appliances with a non-functioning compressor, EPA regulations
require recovery to a level of 4 inches of mercury (Hg) vacuum when using active
recovery equipment. If the compressor is functioning, the level is 0 inches Hg.
Question 10: Which refrigerant classification contains chlorine, fluorine, and
carbon?
A. HFC
B. HCFC
C. HFO
D. Hydrocarbon
CORRECT ANSWER: B. HCFC
Rationale: HCFC stands for Hydrochlorofluorocarbon. These molecules contain
Hydrogen, Chlorine, Fluorine, and Carbon. The presence of chlorine gives them a non-
zero Ozone Depletion Potential (ODP), though lower than CFCs.
, Question 11: What is the primary environmental concern associated with HFC
refrigerants?
A. Ozone depletion
B. High Global Warming Potential (GWP)
C. Toxicity to humans
D. Flammability
CORRECT ANSWER: B. High Global Warming Potential (GWP)
Rationale: While HFCs do not deplete the ozone layer (ODP = 0), many have very high
Global Warming Potentials, meaning they trap heat in the atmosphere much more
effectively than carbon dioxide if released.
Question 12: Who is responsible for ensuring that refrigerant recovery equipment is
certified by an EPA-approved laboratory?
A. The technician using the equipment
B. The equipment manufacturer
C. The EPA directly
D. The state government
CORRECT ANSWER: B. The equipment manufacturer
Rationale: It is the responsibility of the equipment manufacturer to ensure that their
recovery or recycling machines are tested and certified by an EPA-approved
independent laboratory to meet the required performance standards (AHRI Standard
740).
Question 13: What is the maximum amount of refrigerant that can be contained in a
small appliance?
A. 3 pounds
B. 5 pounds
C. 10 pounds
D. 50 pounds
CORRECT ANSWER: B. 5 pounds
Rationale: EPA defines a "small appliance" as one that is manufactured, charged, and
hermetically sealed in a factory with 5 pounds or less of refrigerant. Examples include
window AC units, domestic refrigerators, and dehumidifiers.
Question 14: Which of the following actions is prohibited under the EPA's venting
prohibition?
A. Recovering refrigerant during disposal
B. Purging lines with nitrogen into a recovery machine
C. Venting refrigerant during normal operation of a system
D. Using a gauge manifold with self-sealing hoses
Answers | Complete Refrigerant Recovery and Recycling Study Guide
with Verified Solutions, Detailed Rationales, Core Certification, Type I
Small Appliances, Type II High-Pressure Systems, Type III Low-Pressure
Systems, Leak Detection, EPA Regulations, Ozone Depletion Prevention,
Refrigerant Safety, Recovery Equipment, Clean Air Act Requirements and
HVAC Technician Certification Exam Preparation
Question 1: Which section of the Clean Air Act specifically addresses the
protection of stratospheric ozone?
A. Title IV
B. Title VI
C. Title II
D. Title I
CORRECT ANSWER: B. Title VI
Rationale: Title VI of the Clean Air Act, added by the 1990 amendments, specifically
mandates the phase-out of ozone-depleting substances and establishes regulations for
their handling, recovery, and recycling.
Question 2: What is the primary purpose of recovering refrigerant during HVAC
service?
A. To increase system efficiency
B. To prevent release of refrigerants into the atmosphere
C. To reduce the cost of new refrigerant
D. To clean the internal components of the compressor
CORRECT ANSWER: B. To prevent release of refrigerants into the atmosphere
Rationale: The primary environmental and legal purpose of recovery is to prevent ozone-
depleting substances (ODS) and high global warming potential (GWP) refrigerants from
venting into the atmosphere, which contributes to ozone depletion and climate change.
Question 3: Which type of refrigerant has an Ozone Depletion Potential (ODP) of
zero?
A. CFCs
B. HCFCs
C. HFCs
D. Halons
CORRECT ANSWER: C. HFCs
Rationale: Hydrofluorocarbons (HFCs) do not contain chlorine atoms, which are
responsible for ozone depletion. Therefore, they have an ODP of zero, although they
often have high Global Warming Potentials (GWP).
,Question 4: Under EPA Section 608, it is illegal to knowingly vent which of the
following during maintenance, service, repair, or disposal of appliances?
A. Only CFC refrigerants
B. Only HCFC refrigerants
C. Ozone-depleting refrigerants and their substitutes
D. Nitrogen used for leak testing
CORRECT ANSWER: C. Ozone-depleting refrigerants and their substitutes
Rationale: EPA regulations prohibit the knowing venting of ozone-depleting refrigerants
(CFCs and HCFCs) as well as their non-ozone-depleting substitutes (such as HFCs and
HFOs) during any phase of appliance lifecycle management.
Question 5: What is the maximum allowable leak rate for commercial refrigeration
appliances containing more than 50 pounds of refrigerant under current EPA
regulations?
A. 10% per year
B. 20% per year
C. 30% per year
D. 35% per year
CORRECT ANSWER: B. 20% per year
Rationale: As of recent EPA updates, the leak repair threshold for commercial
refrigeration appliances containing more than 50 pounds of refrigerant is 20% of the
total charge per year. Industrial process refrigeration has a higher threshold, but
standard commercial units are capped at 20%.
Question 6: Which certification type allows a technician to work on small
appliances only?
A. Type I
B. Type II
C. Type III
D. Universal
CORRECT ANSWER: A. Type I
Rationale: Type I certification qualifies technicians to service, maintain, or dispose of
small appliances, which are defined as appliances manufactured, charged, and
hermetically sealed in a factory with 5 pounds or less of refrigerant.
Question 7: What must be done before opening an HVAC system for major repair?
A. The system must be evacuated to 0 psig
B. The refrigerant must be recovered to the required vacuum level
C. The compressor must be removed
D. The system must be flushed with nitrogen
,CORRECT ANSWER: B. The refrigerant must be recovered to the required vacuum
level
Rationale: Before breaking into a system for major repairs, EPA regulations require that
the refrigerant be recovered using approved equipment to specific vacuum levels
depending on the appliance type and size, ensuring minimal release to the atmosphere.
Question 8: Which of the following is considered a "major repair" under EPA
Section 608?
A. Replacing a filter drier
B. Replacing a capacitor
C. Replacement of the compressor, condenser, evaporator, or an auxiliary heat
exchanger coil
D. Adding refrigerant to top off the charge
CORRECT ANSWER: C. Replacement of the compressor, condenser, evaporator, or
an auxiliary heat exchanger coil
Rationale: Major repairs involve the replacement of critical components such as the
compressor, condenser, evaporator, or auxiliary heat exchanger coils. These actions
require strict adherence to recovery and evacuation procedures.
Question 9: What is the required evacuation level for a small appliance with a non-
functioning compressor using active recovery equipment?
A. 0 inches of Hg vacuum
B. 4 inches of Hg vacuum
C. 10 inches of Hg vacuum
D. Atmospheric pressure
CORRECT ANSWER: B. 4 inches of Hg vacuum
Rationale: For small appliances with a non-functioning compressor, EPA regulations
require recovery to a level of 4 inches of mercury (Hg) vacuum when using active
recovery equipment. If the compressor is functioning, the level is 0 inches Hg.
Question 10: Which refrigerant classification contains chlorine, fluorine, and
carbon?
A. HFC
B. HCFC
C. HFO
D. Hydrocarbon
CORRECT ANSWER: B. HCFC
Rationale: HCFC stands for Hydrochlorofluorocarbon. These molecules contain
Hydrogen, Chlorine, Fluorine, and Carbon. The presence of chlorine gives them a non-
zero Ozone Depletion Potential (ODP), though lower than CFCs.
, Question 11: What is the primary environmental concern associated with HFC
refrigerants?
A. Ozone depletion
B. High Global Warming Potential (GWP)
C. Toxicity to humans
D. Flammability
CORRECT ANSWER: B. High Global Warming Potential (GWP)
Rationale: While HFCs do not deplete the ozone layer (ODP = 0), many have very high
Global Warming Potentials, meaning they trap heat in the atmosphere much more
effectively than carbon dioxide if released.
Question 12: Who is responsible for ensuring that refrigerant recovery equipment is
certified by an EPA-approved laboratory?
A. The technician using the equipment
B. The equipment manufacturer
C. The EPA directly
D. The state government
CORRECT ANSWER: B. The equipment manufacturer
Rationale: It is the responsibility of the equipment manufacturer to ensure that their
recovery or recycling machines are tested and certified by an EPA-approved
independent laboratory to meet the required performance standards (AHRI Standard
740).
Question 13: What is the maximum amount of refrigerant that can be contained in a
small appliance?
A. 3 pounds
B. 5 pounds
C. 10 pounds
D. 50 pounds
CORRECT ANSWER: B. 5 pounds
Rationale: EPA defines a "small appliance" as one that is manufactured, charged, and
hermetically sealed in a factory with 5 pounds or less of refrigerant. Examples include
window AC units, domestic refrigerators, and dehumidifiers.
Question 14: Which of the following actions is prohibited under the EPA's venting
prohibition?
A. Recovering refrigerant during disposal
B. Purging lines with nitrogen into a recovery machine
C. Venting refrigerant during normal operation of a system
D. Using a gauge manifold with self-sealing hoses
