EPA 608 Technician Certification Exam Prep | 500+
Most Tested QUESTIONs with Correct Answers &
Expert Rationales 2026/2027
QUESTION 1
What federal agency is granted the legal authority under the Clean Air
Act to administer and enforce Section 608 refrigerant regulations?
A. Department of Transportation (DOT)
B. Environmental Protection Agency (EPA)
C. Occupational Safety and Health Administration (OSHA)
D. Department of Labor
Correct Answer: B. Environmental Protection Agency (EPA)
Detailed Rationale: The EPA administers Section 608 of the Clean Air
Act, establishing rules for refrigerant handling, technician certification,
recovery equipment standards, and penalties for illegal venting.
QUESTION 2
Which family of refrigerants has the highest Ozone Depletion Potential
(ODP)?
A. Hydrofluorocarbons (HFCs)
B. Chlorofluorocarbons (CFCs)
C. Hydrofluoroolefins (HFOs)
D. Hydrocarbons (HCs)
,Correct Answer: B. Chlorofluorocarbons (CFCs)
Detailed Rationale: CFCs contain stable chlorine atoms that migrate to
the stratosphere and break down ozone molecules, giving them the
highest ODP among refrigerant types.
QUESTION 3
What is the definition of "Reclamation" according to EPA standards?
A. Passing refrigerant through a filter-drier on-site
B. Transferring refrigerant directly into another vehicle without testing
C. Processing recovered refrigerant to new-product specifications (ARI-
700 purity standards) through chemical analysis
D. Venting old refrigerant outdoors before charging a new system
Correct Answer: C. Processing recovered refrigerant to new-product
specifications (ARI-700 purity standards) through chemical analysis
Detailed Rationale: Reclamation requires laboratory chemical analysis
to verify that the processed refrigerant matches virgin product purity
standards (ARI-700).
QUESTION 4
What is the maximum allowable liquid fill limit by weight for refrigerant
recovery cylinders?
A. 50% of water capacity
B. 80% of water weight capacity
C. 100% full to the brim
D. 120% of water capacity
,Correct Answer: B. 80% of water weight capacity
Detailed Rationale: Recovery cylinders must never be filled beyond 80%
of their liquid capacity by weight to allow adequate room for thermal
expansion and prevent tank failure.
QUESTION 5
Which gas is approved and recommended for leak-testing a
refrigeration system safely?
A. Compressed oxygen
B. Dry nitrogen
C. Acetylene
D. Raw ambient air
Correct Answer: B. Dry nitrogen
Detailed Rationale: Dry nitrogen is an inert gas that will not react with
compressor oil or form combustible mixtures, unlike oxygen or
compressed air.
QUESTION 6
What classification category does R-134a belong to?
A. Chlorofluorocarbon (CFC)
B. Hydrochlorofluorocarbon (HCFC)
C. Hydrofluorocarbon (HFC)
D. Chlorofluorocarbon blend
Correct Answer: C. Hydrofluorocarbon (HFC)
, Detailed Rationale: R-134a is an HFC refrigerant containing hydrogen,
fluorine, and carbon, resulting in zero ozone depletion potential (ODP).
QUESTION 7
What element released by CFCs and HCFCs in the stratosphere is
primarily responsible for destroying ozone molecules?
A. Nitrogen
B. Chlorine
C. Hydrogen
D. Carbon
Correct Answer: B. Chlorine
Detailed Rationale: Ultraviolet radiation breaks down CFCs and HCFCs,
releasing chlorine atoms. A single chlorine atom can catalytically
destroy up to 100,000 ozone molecules.
QUESTION 8
How long must technicians and appliance owners maintain records of
refrigerant purchases, recovery, and disposal for systems containing 50
or more pounds of refrigerant?
A. 6 months
B. 1 year
C. 3 years
D. 10 years
Correct Answer: C. 3 years
Most Tested QUESTIONs with Correct Answers &
Expert Rationales 2026/2027
QUESTION 1
What federal agency is granted the legal authority under the Clean Air
Act to administer and enforce Section 608 refrigerant regulations?
A. Department of Transportation (DOT)
B. Environmental Protection Agency (EPA)
C. Occupational Safety and Health Administration (OSHA)
D. Department of Labor
Correct Answer: B. Environmental Protection Agency (EPA)
Detailed Rationale: The EPA administers Section 608 of the Clean Air
Act, establishing rules for refrigerant handling, technician certification,
recovery equipment standards, and penalties for illegal venting.
QUESTION 2
Which family of refrigerants has the highest Ozone Depletion Potential
(ODP)?
A. Hydrofluorocarbons (HFCs)
B. Chlorofluorocarbons (CFCs)
C. Hydrofluoroolefins (HFOs)
D. Hydrocarbons (HCs)
,Correct Answer: B. Chlorofluorocarbons (CFCs)
Detailed Rationale: CFCs contain stable chlorine atoms that migrate to
the stratosphere and break down ozone molecules, giving them the
highest ODP among refrigerant types.
QUESTION 3
What is the definition of "Reclamation" according to EPA standards?
A. Passing refrigerant through a filter-drier on-site
B. Transferring refrigerant directly into another vehicle without testing
C. Processing recovered refrigerant to new-product specifications (ARI-
700 purity standards) through chemical analysis
D. Venting old refrigerant outdoors before charging a new system
Correct Answer: C. Processing recovered refrigerant to new-product
specifications (ARI-700 purity standards) through chemical analysis
Detailed Rationale: Reclamation requires laboratory chemical analysis
to verify that the processed refrigerant matches virgin product purity
standards (ARI-700).
QUESTION 4
What is the maximum allowable liquid fill limit by weight for refrigerant
recovery cylinders?
A. 50% of water capacity
B. 80% of water weight capacity
C. 100% full to the brim
D. 120% of water capacity
,Correct Answer: B. 80% of water weight capacity
Detailed Rationale: Recovery cylinders must never be filled beyond 80%
of their liquid capacity by weight to allow adequate room for thermal
expansion and prevent tank failure.
QUESTION 5
Which gas is approved and recommended for leak-testing a
refrigeration system safely?
A. Compressed oxygen
B. Dry nitrogen
C. Acetylene
D. Raw ambient air
Correct Answer: B. Dry nitrogen
Detailed Rationale: Dry nitrogen is an inert gas that will not react with
compressor oil or form combustible mixtures, unlike oxygen or
compressed air.
QUESTION 6
What classification category does R-134a belong to?
A. Chlorofluorocarbon (CFC)
B. Hydrochlorofluorocarbon (HCFC)
C. Hydrofluorocarbon (HFC)
D. Chlorofluorocarbon blend
Correct Answer: C. Hydrofluorocarbon (HFC)
, Detailed Rationale: R-134a is an HFC refrigerant containing hydrogen,
fluorine, and carbon, resulting in zero ozone depletion potential (ODP).
QUESTION 7
What element released by CFCs and HCFCs in the stratosphere is
primarily responsible for destroying ozone molecules?
A. Nitrogen
B. Chlorine
C. Hydrogen
D. Carbon
Correct Answer: B. Chlorine
Detailed Rationale: Ultraviolet radiation breaks down CFCs and HCFCs,
releasing chlorine atoms. A single chlorine atom can catalytically
destroy up to 100,000 ozone molecules.
QUESTION 8
How long must technicians and appliance owners maintain records of
refrigerant purchases, recovery, and disposal for systems containing 50
or more pounds of refrigerant?
A. 6 months
B. 1 year
C. 3 years
D. 10 years
Correct Answer: C. 3 years
