EPA 608 HVAC Certification Exam Prep – Real Practice Questions, Answers &
Detailed Rationales (Updated 2026) | Core, Type I, Type II & Type III
Review, Refrigerant Recovery & Recycling Procedures, Leak Detection & Repair,
System Evacuation & Charging, Refrigeration Cycle Operations, EPA Regulations,
Clean Air Act Compliance & HVAC Safety Standards
Question 1: What is the primary environmental purpose of EPA Section 608 of the
Clean Air Act?
A. To reduce energy consumption in HVAC systems B. To regulate the manufacture of
refrigeration equipment C. To prevent the release of ozone-depleting refrigerants into
the atmosphere D. To establish pricing standards for refrigerants
CORRECT ANSWER: C. To prevent the release of ozone-depleting refrigerants into
the atmosphere
Rationale: EPA Section 608 was established under the Clean Air Act specifically to
minimize the release of ozone-depleting substances and high-GWP refrigerants during
the servicing, maintenance, repair, or disposal of stationary refrigeration and air-
conditioning equipment, thereby protecting the stratospheric ozone layer.
www.epa.gov
Question 2: Which certification type is required for a technician servicing a
residential window air conditioner containing 4 lbs of R-410A?
A. Type I B. Type II C. Type III D. Universal only
CORRECT ANSWER: A. Type I
Rationale: Type I certification covers small appliances, which are defined as fully
manufactured, charged, and hermetically sealed appliances containing 5 pounds or
less of refrigerant, including residential window air conditioners, refrigerators, and
under-counter ice makers.
www.epa.gov
Question 3: What does the term "recover" mean under EPA Section 608
regulations?
A. To clean refrigerant for immediate reuse in the same system B. To remove refrigerant
from an appliance and store it in an external container without necessarily processing it
C. To reprocess refrigerant to meet AHRI 700 specifications D. To vent refrigerant during
emergency repairs
CORRECT ANSWER: B. To remove refrigerant from an appliance and store it in an
external container without necessarily processing it
Rationale: Under 40 CFR Part 82, Subpart F, "recover" is defined as removing refrigerant
in any condition from an appliance and storing it in an external container without
necessarily testing or processing it in any way. This is the foundational step before
recycling or reclaiming.
,www.epa.gov
Question 4: As of January 1, 2026, what is the minimum refrigerant charge that
triggers full Section 608 leak rate tracking requirements for commercial
appliances?
A. 5 pounds B. 15 pounds C. 50 pounds D. 100 pounds
CORRECT ANSWER: B. 15 pounds
Rationale: Effective January 1, 2026, the EPA lowered the appliance charge threshold
that triggers Section 608 leak rate tracking from 50 lbs to 15 lbs, meaning any
commercial or industrial appliance containing 15 lbs or more of a regulated refrigerant
is now subject to leak monitoring, repair timelines, and record-keeping requirements.
refrigeranttrack.com
Question 5: What is the maximum annualized leak rate allowed for a commercial
refrigeration system under EPA Section 608?
A. 10% B. 15% C. 30% D. 50%
CORRECT ANSWER: B. 15%
Rationale: Commercial refrigeration systems, including supermarket racks, stand-alone
cases, and walk-in coolers, must maintain an annualized leak rate below 15% under
EPA Section 608 regulations. Comfort cooling and industrial process refrigeration
systems have a 30% threshold.
refrigeranttrack.com
Question 6: Which refrigerant is classified as an HCFC and is being phased out
under the Montreal Protocol?
A. R-134a B. R-410A C. R-22 D. R-744
CORRECT ANSWER: C. R-22
Rationale: R-22 (chlorodifluoromethane) is an HCFC (hydrochlorofluorocarbon)
refrigerant that contains chlorine, which contributes to ozone depletion. It is being
phased out under the Montreal Protocol and EPA regulations, with production and
import for new equipment prohibited in the United States.
Question 7: What is the required timeframe for repairing a leak once a covered
appliance exceeds the applicable leak rate threshold?
A. 10 days B. 30 days C. 60 days D. 90 days
CORRECT ANSWER: B. 30 days
Rationale: When a covered appliance is found to have an annualized leak rate
exceeding the applicable threshold (15% for commercial refrigeration, 30% for comfort
,cooling), the owner must repair the leak within 30 days of discovery, unless a one-time
extension is formally requested from the EPA.
19january2017snapshot.epa.gov
Question 8: Which of the following activities defines a "technician" under EPA
Section 608 regulations?
A. Installing electrical wiring for an HVAC unit B. Attaching and detaching hoses and
gauges to measure pressure within an appliance C. Painting refrigeration equipment for
corrosion protection D. Cleaning condenser coils with water
CORRECT ANSWER: B. Attaching and detaching hoses and gauges to measure
pressure within an appliance
Rationale: EPA regulations define a "technician" as an individual who performs activities
such as attaching/detaching hoses and gauges to measure pressure, adding or
removing refrigerant, or any activity that violates the integrity of an appliance containing
refrigerant.
www.epa.gov
Question 9: What is the minimum evacuation level required when recovering
refrigerant from a small appliance with a non-functioning compressor using a
system-dependent recovery device?
A. 0 psig 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 non-functioning compressors, EPA regulations
require recovery to 4 inches of mercury (Hg) vacuum when using a system-dependent
(passive) recovery device. If the compressor is functioning, recovery to 80% of the
nameplate charge or 4 inches Hg vacuum is required.
Question 10: Which certification type covers technicians who service centrifugal
chillers using low-pressure refrigerants like R-123 or R-11?
A. Type I B. Type II C. Type III D. Core only
CORRECT ANSWER: C. Type III
Rationale: Type III certification is specifically for servicing or disposing of low-pressure
appliances, which include centrifugal chillers that operate below atmospheric pressure
and typically use refrigerants such as R-123, R-11, or newer low-GWP alternatives
designed for low-pressure applications.
www.consol.org
Question 11: What is the primary difference between "recycling" and "reclaiming"
refrigerant under EPA regulations?
, A. Recycling is done on-site for reuse by the same owner; reclaiming processes
refrigerant to AHRI 700 standards for resale B. Recycling requires EPA approval;
reclaiming does not C. Recycling removes oil only; reclaiming removes moisture only D.
There is no difference; the terms are interchangeable
CORRECT ANSWER: A. Recycling is done on-site for reuse by the same owner;
reclaiming processes refrigerant to AHRI 700 standards for resale
Rationale: Recycling extracts and cleans refrigerant for reuse by the same owner,
typically using oil separation and filter-driers. Reclaiming reprocesses refrigerant to
meet all specifications in AHRI Standard 700 and verifies compliance through
prescribed analytical methods, allowing it to be resold as new refrigerant.
www.epa.gov
Question 12: Which of the following refrigerants has the highest Global Warming
Potential (GWP)?
A. R-134a B. R-404A C. R-410A D. R-32
CORRECT ANSWER: B. R-404A
Rationale: R-404A has a GWP of approximately 3,922, significantly higher than R-134a
(~1,430), R-410A (~2,088), and R-32 (~675). High-GWP refrigerants are increasingly
regulated under EPA programs aimed at reducing greenhouse gas emissions from
refrigeration systems.
Question 13: What is the required retention period for Section 608 service records
documenting refrigerant recovery, leak repairs, and technician certifications?
A. 1 year B. 3 years C. 5 years D. Indefinitely
CORRECT ANSWER: B. 3 years
Rationale: EPA Section 608 requires owners of covered appliances to maintain service
records, including dates of service, technician certification numbers, refrigerant
quantities added/recovered, leak inspection results, and repair documentation, for a
minimum of three years and make them available upon EPA request.
refrigeranttrack.com
Question 14: Which safety hazard is most directly associated with working on low-
pressure refrigeration systems during evacuation?
A. Electrical shock from high-voltage components B. Risk of system collapse due to
external atmospheric pressure exceeding internal pressure C. Refrigerant flammability
at low temperatures D. Oil mist inhalation during recovery
CORRECT ANSWER: B. Risk of system collapse due to external atmospheric
pressure exceeding internal pressure
Detailed Rationales (Updated 2026) | Core, Type I, Type II & Type III
Review, Refrigerant Recovery & Recycling Procedures, Leak Detection & Repair,
System Evacuation & Charging, Refrigeration Cycle Operations, EPA Regulations,
Clean Air Act Compliance & HVAC Safety Standards
Question 1: What is the primary environmental purpose of EPA Section 608 of the
Clean Air Act?
A. To reduce energy consumption in HVAC systems B. To regulate the manufacture of
refrigeration equipment C. To prevent the release of ozone-depleting refrigerants into
the atmosphere D. To establish pricing standards for refrigerants
CORRECT ANSWER: C. To prevent the release of ozone-depleting refrigerants into
the atmosphere
Rationale: EPA Section 608 was established under the Clean Air Act specifically to
minimize the release of ozone-depleting substances and high-GWP refrigerants during
the servicing, maintenance, repair, or disposal of stationary refrigeration and air-
conditioning equipment, thereby protecting the stratospheric ozone layer.
www.epa.gov
Question 2: Which certification type is required for a technician servicing a
residential window air conditioner containing 4 lbs of R-410A?
A. Type I B. Type II C. Type III D. Universal only
CORRECT ANSWER: A. Type I
Rationale: Type I certification covers small appliances, which are defined as fully
manufactured, charged, and hermetically sealed appliances containing 5 pounds or
less of refrigerant, including residential window air conditioners, refrigerators, and
under-counter ice makers.
www.epa.gov
Question 3: What does the term "recover" mean under EPA Section 608
regulations?
A. To clean refrigerant for immediate reuse in the same system B. To remove refrigerant
from an appliance and store it in an external container without necessarily processing it
C. To reprocess refrigerant to meet AHRI 700 specifications D. To vent refrigerant during
emergency repairs
CORRECT ANSWER: B. To remove refrigerant from an appliance and store it in an
external container without necessarily processing it
Rationale: Under 40 CFR Part 82, Subpart F, "recover" is defined as removing refrigerant
in any condition from an appliance and storing it in an external container without
necessarily testing or processing it in any way. This is the foundational step before
recycling or reclaiming.
,www.epa.gov
Question 4: As of January 1, 2026, what is the minimum refrigerant charge that
triggers full Section 608 leak rate tracking requirements for commercial
appliances?
A. 5 pounds B. 15 pounds C. 50 pounds D. 100 pounds
CORRECT ANSWER: B. 15 pounds
Rationale: Effective January 1, 2026, the EPA lowered the appliance charge threshold
that triggers Section 608 leak rate tracking from 50 lbs to 15 lbs, meaning any
commercial or industrial appliance containing 15 lbs or more of a regulated refrigerant
is now subject to leak monitoring, repair timelines, and record-keeping requirements.
refrigeranttrack.com
Question 5: What is the maximum annualized leak rate allowed for a commercial
refrigeration system under EPA Section 608?
A. 10% B. 15% C. 30% D. 50%
CORRECT ANSWER: B. 15%
Rationale: Commercial refrigeration systems, including supermarket racks, stand-alone
cases, and walk-in coolers, must maintain an annualized leak rate below 15% under
EPA Section 608 regulations. Comfort cooling and industrial process refrigeration
systems have a 30% threshold.
refrigeranttrack.com
Question 6: Which refrigerant is classified as an HCFC and is being phased out
under the Montreal Protocol?
A. R-134a B. R-410A C. R-22 D. R-744
CORRECT ANSWER: C. R-22
Rationale: R-22 (chlorodifluoromethane) is an HCFC (hydrochlorofluorocarbon)
refrigerant that contains chlorine, which contributes to ozone depletion. It is being
phased out under the Montreal Protocol and EPA regulations, with production and
import for new equipment prohibited in the United States.
Question 7: What is the required timeframe for repairing a leak once a covered
appliance exceeds the applicable leak rate threshold?
A. 10 days B. 30 days C. 60 days D. 90 days
CORRECT ANSWER: B. 30 days
Rationale: When a covered appliance is found to have an annualized leak rate
exceeding the applicable threshold (15% for commercial refrigeration, 30% for comfort
,cooling), the owner must repair the leak within 30 days of discovery, unless a one-time
extension is formally requested from the EPA.
19january2017snapshot.epa.gov
Question 8: Which of the following activities defines a "technician" under EPA
Section 608 regulations?
A. Installing electrical wiring for an HVAC unit B. Attaching and detaching hoses and
gauges to measure pressure within an appliance C. Painting refrigeration equipment for
corrosion protection D. Cleaning condenser coils with water
CORRECT ANSWER: B. Attaching and detaching hoses and gauges to measure
pressure within an appliance
Rationale: EPA regulations define a "technician" as an individual who performs activities
such as attaching/detaching hoses and gauges to measure pressure, adding or
removing refrigerant, or any activity that violates the integrity of an appliance containing
refrigerant.
www.epa.gov
Question 9: What is the minimum evacuation level required when recovering
refrigerant from a small appliance with a non-functioning compressor using a
system-dependent recovery device?
A. 0 psig 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 non-functioning compressors, EPA regulations
require recovery to 4 inches of mercury (Hg) vacuum when using a system-dependent
(passive) recovery device. If the compressor is functioning, recovery to 80% of the
nameplate charge or 4 inches Hg vacuum is required.
Question 10: Which certification type covers technicians who service centrifugal
chillers using low-pressure refrigerants like R-123 or R-11?
A. Type I B. Type II C. Type III D. Core only
CORRECT ANSWER: C. Type III
Rationale: Type III certification is specifically for servicing or disposing of low-pressure
appliances, which include centrifugal chillers that operate below atmospheric pressure
and typically use refrigerants such as R-123, R-11, or newer low-GWP alternatives
designed for low-pressure applications.
www.consol.org
Question 11: What is the primary difference between "recycling" and "reclaiming"
refrigerant under EPA regulations?
, A. Recycling is done on-site for reuse by the same owner; reclaiming processes
refrigerant to AHRI 700 standards for resale B. Recycling requires EPA approval;
reclaiming does not C. Recycling removes oil only; reclaiming removes moisture only D.
There is no difference; the terms are interchangeable
CORRECT ANSWER: A. Recycling is done on-site for reuse by the same owner;
reclaiming processes refrigerant to AHRI 700 standards for resale
Rationale: Recycling extracts and cleans refrigerant for reuse by the same owner,
typically using oil separation and filter-driers. Reclaiming reprocesses refrigerant to
meet all specifications in AHRI Standard 700 and verifies compliance through
prescribed analytical methods, allowing it to be resold as new refrigerant.
www.epa.gov
Question 12: Which of the following refrigerants has the highest Global Warming
Potential (GWP)?
A. R-134a B. R-404A C. R-410A D. R-32
CORRECT ANSWER: B. R-404A
Rationale: R-404A has a GWP of approximately 3,922, significantly higher than R-134a
(~1,430), R-410A (~2,088), and R-32 (~675). High-GWP refrigerants are increasingly
regulated under EPA programs aimed at reducing greenhouse gas emissions from
refrigeration systems.
Question 13: What is the required retention period for Section 608 service records
documenting refrigerant recovery, leak repairs, and technician certifications?
A. 1 year B. 3 years C. 5 years D. Indefinitely
CORRECT ANSWER: B. 3 years
Rationale: EPA Section 608 requires owners of covered appliances to maintain service
records, including dates of service, technician certification numbers, refrigerant
quantities added/recovered, leak inspection results, and repair documentation, for a
minimum of three years and make them available upon EPA request.
refrigeranttrack.com
Question 14: Which safety hazard is most directly associated with working on low-
pressure refrigeration systems during evacuation?
A. Electrical shock from high-voltage components B. Risk of system collapse due to
external atmospheric pressure exceeding internal pressure C. Refrigerant flammability
at low temperatures D. Oil mist inhalation during recovery
CORRECT ANSWER: B. Risk of system collapse due to external atmospheric
pressure exceeding internal pressure
