EPA 608 UNIVERSAL CERTIFICATION | ENVIRONMENTAL
PROTECTION AGENCY | ACADEMIC YEAR 2026/2027 | 150
PRACTICE QUESTIONS WITH ANSWERS & DETAILED
RATIONALES
CORE DOMAINS
1. Ozone Depletion and Environmental Impact
2. Clean Air Act, Montreal Protocol, and Section 608 Regulations
3. Refrigerant Classification and Chemistry
4. Refrigeration Cycle and System Components
5. Recovery, Recycling, and Reclamation Procedures
6. Leak Detection, Evacuation, and Charging
7. Safety, Cylinders, and Shipping
8. Type I: Small Appliances
9. Type II: High-Pressure Appliances
10.Type III: Low-Pressure Appliances
INTRODUCTION
This comprehensive practice examination is designed to assess the knowledge,
regulatory compliance, and technical competencies required for the EPA Section
608 Universal Certification. The assessment evaluates ozone depletion, the Clean
Air Act, refrigerant classification, recovery and recycling procedures, leak
detection, safety practices, and the specific requirements for Type I (small
appliances), Type II (high-pressure), and Type III (low-pressure) equipment.
Questions encompass multiple-choice and scenario-based formats emphasizing
real-world application, regulatory compliance, and safe refrigerant handling.
,Candidates must demonstrate mastery of EPA regulations and industry best
practices to ensure environmental protection and technician safety.
SECTION ONE: CORE — GENERAL REGULATIONS & OZONE DEPLETION
(QUESTIONS 1–50)
Question 1
Which refrigerant classification has the highest ozone depletion potential (ODP)?
A. HFC (Hydrofluorocarbon)
B. HCFC (Hydrochlorofluorocarbon)
C. CFC (Chlorofluorocarbon)
D. Natural refrigerants
Correct answer: C
RATIONALE: CFC refrigerants contain chlorine atoms that are highly
destructive to stratospheric ozone. CFCs have ODP values ranging from 0.6 to 1.0,
with R-11 and R-12 having an ODP of 1.0, the highest reference value. HCFCs have
lower ODP (0.01–0.1), while HFCs have zero ODP because they contain no
chlorine.
Question 2
Under EPA Section 608 regulations, what is the maximum allowable annual leak
rate for commercial refrigeration equipment containing more than 50 pounds of
refrigerant?
A. 5%
B. 10%
C. 15%
D. 35%
Correct answer: D
RATIONALE: EPA Section 608 regulations specify different leak repair
thresholds based on equipment type. For commercial and industrial process
refrigeration systems containing more than 50 pounds of refrigerant, the
allowable annual leak rate is 35%. If the leak rate exceeds this threshold, repairs
must be completed within 30 days or a retrofit/retirement plan must be
,developed. For comfort cooling and other non-process equipment, the threshold
is lower at 15%.
Question 3
What is the primary purpose of Section 608 of the Clean Air Act?
A. To regulate technician licensing only
B. To reduce ozone depletion and emissions of refrigerants
C. To set equipment manufacturing standards only
D. To mandate refrigerant price controls
Correct answer: B
RATIONALE: Section 608 focuses on preventing refrigerant emissions to
protect the ozone layer and reduce greenhouse gases. It establishes requirements
for technician certification, refrigerant recovery and recycling, leak repair, and
safe disposal.
Question 4
Which refrigerant is considered an HCFC?
A. R-410A
B. R-134a
C. R-22
D. R-744
Correct answer: C
RATIONALE: HCFCs (like R-22) contain chlorine and will be phased out due to
ozone depletion potential. R-410A and R-134a are HFCs with zero ODP. R-744 is
carbon dioxide, a natural refrigerant.
Question 5
Which international treaty phased out CFCs?
A. Kyoto Protocol
B. Paris Agreement
C. Montreal Protocol
D. Clean Air Act
, Correct answer: C
RATIONALE: The Montreal Protocol (1987) phased out CFCs and was later
amended to include HCFCs and HFCs (Kigali Amendment).
Question 6
An ozone molecule contains:
A. 1 oxygen atom
B. 2 oxygen atoms
C. 3 oxygen atoms
D. 4 oxygen atoms
Correct answer: C
RATIONALE: Ozone = O₃, consisting of three oxygen atoms. O₂ is oxygen gas.
Question 7
What is the term "ozone depletion potential" (ODP) compared to?
A. R-11
B. R-12
C. R-22
D. R-134a
Correct answer: A
RATIONALE: The ODP scale uses R-11 as the reference with a value of 1.0.
Other CFCs and HCFCs have ODPs that range from 0.01 to 1.0.
Question 8
The Clean Air Act of 1990 prohibits venting:
A. Only CFCs
B. Only HCFCs
C. Only HFCs
D. All refrigerants
Correct answer: D
RATIONALE: Venting any refrigerant (CFC, HCFC, HFC, or blends) is illegal
PROTECTION AGENCY | ACADEMIC YEAR 2026/2027 | 150
PRACTICE QUESTIONS WITH ANSWERS & DETAILED
RATIONALES
CORE DOMAINS
1. Ozone Depletion and Environmental Impact
2. Clean Air Act, Montreal Protocol, and Section 608 Regulations
3. Refrigerant Classification and Chemistry
4. Refrigeration Cycle and System Components
5. Recovery, Recycling, and Reclamation Procedures
6. Leak Detection, Evacuation, and Charging
7. Safety, Cylinders, and Shipping
8. Type I: Small Appliances
9. Type II: High-Pressure Appliances
10.Type III: Low-Pressure Appliances
INTRODUCTION
This comprehensive practice examination is designed to assess the knowledge,
regulatory compliance, and technical competencies required for the EPA Section
608 Universal Certification. The assessment evaluates ozone depletion, the Clean
Air Act, refrigerant classification, recovery and recycling procedures, leak
detection, safety practices, and the specific requirements for Type I (small
appliances), Type II (high-pressure), and Type III (low-pressure) equipment.
Questions encompass multiple-choice and scenario-based formats emphasizing
real-world application, regulatory compliance, and safe refrigerant handling.
,Candidates must demonstrate mastery of EPA regulations and industry best
practices to ensure environmental protection and technician safety.
SECTION ONE: CORE — GENERAL REGULATIONS & OZONE DEPLETION
(QUESTIONS 1–50)
Question 1
Which refrigerant classification has the highest ozone depletion potential (ODP)?
A. HFC (Hydrofluorocarbon)
B. HCFC (Hydrochlorofluorocarbon)
C. CFC (Chlorofluorocarbon)
D. Natural refrigerants
Correct answer: C
RATIONALE: CFC refrigerants contain chlorine atoms that are highly
destructive to stratospheric ozone. CFCs have ODP values ranging from 0.6 to 1.0,
with R-11 and R-12 having an ODP of 1.0, the highest reference value. HCFCs have
lower ODP (0.01–0.1), while HFCs have zero ODP because they contain no
chlorine.
Question 2
Under EPA Section 608 regulations, what is the maximum allowable annual leak
rate for commercial refrigeration equipment containing more than 50 pounds of
refrigerant?
A. 5%
B. 10%
C. 15%
D. 35%
Correct answer: D
RATIONALE: EPA Section 608 regulations specify different leak repair
thresholds based on equipment type. For commercial and industrial process
refrigeration systems containing more than 50 pounds of refrigerant, the
allowable annual leak rate is 35%. If the leak rate exceeds this threshold, repairs
must be completed within 30 days or a retrofit/retirement plan must be
,developed. For comfort cooling and other non-process equipment, the threshold
is lower at 15%.
Question 3
What is the primary purpose of Section 608 of the Clean Air Act?
A. To regulate technician licensing only
B. To reduce ozone depletion and emissions of refrigerants
C. To set equipment manufacturing standards only
D. To mandate refrigerant price controls
Correct answer: B
RATIONALE: Section 608 focuses on preventing refrigerant emissions to
protect the ozone layer and reduce greenhouse gases. It establishes requirements
for technician certification, refrigerant recovery and recycling, leak repair, and
safe disposal.
Question 4
Which refrigerant is considered an HCFC?
A. R-410A
B. R-134a
C. R-22
D. R-744
Correct answer: C
RATIONALE: HCFCs (like R-22) contain chlorine and will be phased out due to
ozone depletion potential. R-410A and R-134a are HFCs with zero ODP. R-744 is
carbon dioxide, a natural refrigerant.
Question 5
Which international treaty phased out CFCs?
A. Kyoto Protocol
B. Paris Agreement
C. Montreal Protocol
D. Clean Air Act
, Correct answer: C
RATIONALE: The Montreal Protocol (1987) phased out CFCs and was later
amended to include HCFCs and HFCs (Kigali Amendment).
Question 6
An ozone molecule contains:
A. 1 oxygen atom
B. 2 oxygen atoms
C. 3 oxygen atoms
D. 4 oxygen atoms
Correct answer: C
RATIONALE: Ozone = O₃, consisting of three oxygen atoms. O₂ is oxygen gas.
Question 7
What is the term "ozone depletion potential" (ODP) compared to?
A. R-11
B. R-12
C. R-22
D. R-134a
Correct answer: A
RATIONALE: The ODP scale uses R-11 as the reference with a value of 1.0.
Other CFCs and HCFCs have ODPs that range from 0.01 to 1.0.
Question 8
The Clean Air Act of 1990 prohibits venting:
A. Only CFCs
B. Only HCFCs
C. Only HFCs
D. All refrigerants
Correct answer: D
RATIONALE: Venting any refrigerant (CFC, HCFC, HFC, or blends) is illegal
