EPA Section 608 Universal Certification
Practice Exam 100 Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
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1. Which refrigerant classification has the highest ozone depletion potential
(ODP)?
A. HFC (Hydrofluorocarbon)
B. HCFC (Hydrochlorofluorocarbon)
C. CFC (Chlorofluorocarbon)
D. Natural refrigerants
CFC refrigerants contain chlorine atoms that are highly destructive to
stratospheric ozone. When released, CFCs break down under UV radiation,
releasing chlorine that catalytically destroys thousands of ozone molecules.
R-11 and R-12 have an ODP of 1.0, the highest reference value.
2. What is the primary purpose of the Montreal Protocol?
A. Regulate greenhouse gas emissions
B. Phase out ozone-depleting substances
C. Establish global energy efficiency standards
D. Mandate the use of HFC refrigerants
The Montreal Protocol is an international treaty designed to protect the
ozone layer by phasing out the production and consumption of ozone-
depleting substances.
,3. Under EPA Section 608, it is illegal to:
A. Recover refrigerant using certified equipment
B. Vent refrigerant to the atmosphere during service, maintenance, or
disposal
C. Recycle refrigerant for reuse in the same system
D. Use reclaimed refrigerant
Since July 1, 1992, the intentional venting of refrigerants (CFCs, HCFCs, and
since 2018, HFCs) is illegal. Recovery, recycling, and reclamation are legal and
required practices.
4. "Reclaim" of refrigerant means:
A. Processing refrigerant to meet AHRI Standard 700 purity specifications
B. Removing refrigerant from a system and storing it in a cylinder
C. Cleaning refrigerant for reuse in the same system using portable equipment
D. Destroying the refrigerant
Reclaiming involves reprocessing refrigerant to chemically match AHRI
Standard 700 (new product specifications). Removing refrigerant is
"recovery." Cleaning for reuse in the same system is "recycling."
5. Which layer of the atmosphere contains the ozone layer?
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere
The ozone layer is located in the stratosphere, approximately 6 to 30 miles
above the Earth's surface. The troposphere is the lowest layer where weather
occurs.
6. Which of the following refrigerants is classified as a CFC?
, A. R-134a
B. R-22
C. R-12
D. R-410A
R-12 (dichlorodifluoromethane) is a CFC containing chlorine. R-134a is an HFC,
R-22 is an HCFC, and R-410A is an HFC blend.
7. What does ODP stand for?
A. Ozone Depletion Potential
B. Ozone Density Parameter
C. Ozone Degradation Percentage
D. Ozone Displacement Potential
ODP stands for Ozone Depletion Potential, which measures a substance's
ability to destroy stratospheric ozone.
8. Which refrigerant is an HFC?
A. R-22
B. R-12
C. R-134a
D. R-11
R-134a is a hydrofluorocarbon (HFC) which contains no chlorine and has an
ODP of zero.
9. What is the primary environmental concern with HFCs?
A. High ODP
B. High Global Warming Potential (GWP)
C. High toxicity
D. High flammability
While HFCs have zero ODP, many have high Global Warming Potential,
contributing significantly to climate change.
Practice Exam 100 Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
Download Pdf
1. Which refrigerant classification has the highest ozone depletion potential
(ODP)?
A. HFC (Hydrofluorocarbon)
B. HCFC (Hydrochlorofluorocarbon)
C. CFC (Chlorofluorocarbon)
D. Natural refrigerants
CFC refrigerants contain chlorine atoms that are highly destructive to
stratospheric ozone. When released, CFCs break down under UV radiation,
releasing chlorine that catalytically destroys thousands of ozone molecules.
R-11 and R-12 have an ODP of 1.0, the highest reference value.
2. What is the primary purpose of the Montreal Protocol?
A. Regulate greenhouse gas emissions
B. Phase out ozone-depleting substances
C. Establish global energy efficiency standards
D. Mandate the use of HFC refrigerants
The Montreal Protocol is an international treaty designed to protect the
ozone layer by phasing out the production and consumption of ozone-
depleting substances.
,3. Under EPA Section 608, it is illegal to:
A. Recover refrigerant using certified equipment
B. Vent refrigerant to the atmosphere during service, maintenance, or
disposal
C. Recycle refrigerant for reuse in the same system
D. Use reclaimed refrigerant
Since July 1, 1992, the intentional venting of refrigerants (CFCs, HCFCs, and
since 2018, HFCs) is illegal. Recovery, recycling, and reclamation are legal and
required practices.
4. "Reclaim" of refrigerant means:
A. Processing refrigerant to meet AHRI Standard 700 purity specifications
B. Removing refrigerant from a system and storing it in a cylinder
C. Cleaning refrigerant for reuse in the same system using portable equipment
D. Destroying the refrigerant
Reclaiming involves reprocessing refrigerant to chemically match AHRI
Standard 700 (new product specifications). Removing refrigerant is
"recovery." Cleaning for reuse in the same system is "recycling."
5. Which layer of the atmosphere contains the ozone layer?
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere
The ozone layer is located in the stratosphere, approximately 6 to 30 miles
above the Earth's surface. The troposphere is the lowest layer where weather
occurs.
6. Which of the following refrigerants is classified as a CFC?
, A. R-134a
B. R-22
C. R-12
D. R-410A
R-12 (dichlorodifluoromethane) is a CFC containing chlorine. R-134a is an HFC,
R-22 is an HCFC, and R-410A is an HFC blend.
7. What does ODP stand for?
A. Ozone Depletion Potential
B. Ozone Density Parameter
C. Ozone Degradation Percentage
D. Ozone Displacement Potential
ODP stands for Ozone Depletion Potential, which measures a substance's
ability to destroy stratospheric ozone.
8. Which refrigerant is an HFC?
A. R-22
B. R-12
C. R-134a
D. R-11
R-134a is a hydrofluorocarbon (HFC) which contains no chlorine and has an
ODP of zero.
9. What is the primary environmental concern with HFCs?
A. High ODP
B. High Global Warming Potential (GWP)
C. High toxicity
D. High flammability
While HFCs have zero ODP, many have high Global Warming Potential,
contributing significantly to climate change.
