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EPA 608 PRACTICE EXAM Questions with Answers &
Rationales
1. Ozone depletion is caused by which of the following
refrigerants?
A. HFCs
B. CFCs and HCFCs
C. HFOs
D. Ammonia
Answer: B
Rationale: Chlorofluorocarbons (CFCs) and
hydrochlorofluorocarbons (HCFCs) contain chlorine that
depletes the ozone layer.
2. Which international treaty phased out CFC refrigerants?
A. Kyoto Protocol
B. Montreal Protocol
C. Paris Agreement
D. Clean Air Act only
Answer: B
Rationale: The Montreal Protocol established schedules for
phasing out ozone-depleting substances.
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3. The U.S. law implementing the Montreal Protocol is:
A. The Clean Air Act, Section 608
B. The Safe Drinking Water Act
C. The Energy Policy Act
D. OSHA regulations
Answer: A
Rationale: Section 608 of the Clean Air Act regulates refrigerant
handling.
4. Which refrigerant is considered chlorine-free and has low
ozone depletion potential?
A. R-22
B. R-12
C. R-134a
D. R-123
Answer: C
Rationale: R-134a is an HFC with no chlorine and zero ODP.
5. HFC refrigerants, such as R-410A, have:
A. High ozone depletion potential
B. Zero ozone depletion potential but high global warming
potential
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C. Low GWP
D. Chlorine content
Answer: B
Rationale: HFCs do not deplete ozone but may have high GWP.
6. What is the purpose of refrigerant recovery?
A. To vent refrigerants to the atmosphere
B. To remove refrigerant from a system and store it in a
container
C. To increase system pressure
D. To reduce system efficiency
Answer: B
Rationale: Recovery removes refrigerant for reuse or
reclamation, preventing venting.
7. Venting of CFC and HCFC refrigerants to the atmosphere is:
A. Allowed if the amount is small
B. Always prohibited for CFC/HCFC refrigerants in HVAC systems
C. Only allowed for R-134a
D. Allowed with a permit
Answer: B
Rationale: Venting of ozone-depleting refrigerants is prohibited.
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8. HFC refrigerants (e.g., R-134a) under Section 608:
A. May be vented
B. Must be recovered, and venting is prohibited in most cases
C. Are not regulated
D. May be released during repair
Answer: B
Rationale: The EPA prohibits venting of HFCs used as
refrigerants.
9. Before disposing of a small appliance containing refrigerant,
the technician must:
A. Vent the refrigerant
B. Recover the refrigerant or verify that it is not present
C. Cut the compressor without recovery
D. Sell it without any action
Answer: B
Rationale: Refrigerant must be recovered or its absence
verified.
10. Which of the following is required to service HVAC systems
containing refrigerants?
A. EPA Section 608 certification
B. EPA Section 609 certification
EPA 608 PRACTICE EXAM Questions with Answers &
Rationales
1. Ozone depletion is caused by which of the following
refrigerants?
A. HFCs
B. CFCs and HCFCs
C. HFOs
D. Ammonia
Answer: B
Rationale: Chlorofluorocarbons (CFCs) and
hydrochlorofluorocarbons (HCFCs) contain chlorine that
depletes the ozone layer.
2. Which international treaty phased out CFC refrigerants?
A. Kyoto Protocol
B. Montreal Protocol
C. Paris Agreement
D. Clean Air Act only
Answer: B
Rationale: The Montreal Protocol established schedules for
phasing out ozone-depleting substances.
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3. The U.S. law implementing the Montreal Protocol is:
A. The Clean Air Act, Section 608
B. The Safe Drinking Water Act
C. The Energy Policy Act
D. OSHA regulations
Answer: A
Rationale: Section 608 of the Clean Air Act regulates refrigerant
handling.
4. Which refrigerant is considered chlorine-free and has low
ozone depletion potential?
A. R-22
B. R-12
C. R-134a
D. R-123
Answer: C
Rationale: R-134a is an HFC with no chlorine and zero ODP.
5. HFC refrigerants, such as R-410A, have:
A. High ozone depletion potential
B. Zero ozone depletion potential but high global warming
potential
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C. Low GWP
D. Chlorine content
Answer: B
Rationale: HFCs do not deplete ozone but may have high GWP.
6. What is the purpose of refrigerant recovery?
A. To vent refrigerants to the atmosphere
B. To remove refrigerant from a system and store it in a
container
C. To increase system pressure
D. To reduce system efficiency
Answer: B
Rationale: Recovery removes refrigerant for reuse or
reclamation, preventing venting.
7. Venting of CFC and HCFC refrigerants to the atmosphere is:
A. Allowed if the amount is small
B. Always prohibited for CFC/HCFC refrigerants in HVAC systems
C. Only allowed for R-134a
D. Allowed with a permit
Answer: B
Rationale: Venting of ozone-depleting refrigerants is prohibited.
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8. HFC refrigerants (e.g., R-134a) under Section 608:
A. May be vented
B. Must be recovered, and venting is prohibited in most cases
C. Are not regulated
D. May be released during repair
Answer: B
Rationale: The EPA prohibits venting of HFCs used as
refrigerants.
9. Before disposing of a small appliance containing refrigerant,
the technician must:
A. Vent the refrigerant
B. Recover the refrigerant or verify that it is not present
C. Cut the compressor without recovery
D. Sell it without any action
Answer: B
Rationale: Refrigerant must be recovered or its absence
verified.
10. Which of the following is required to service HVAC systems
containing refrigerants?
A. EPA Section 608 certification
B. EPA Section 609 certification
