EPA SECTION 608 TYPE II CERTIFICATION
PRACTICE EXAM STUDY GUIDE UPDATED
2026/2027 | VERIFIED QUESTIONS AND ANSWERS
WITH DETAILED RATIONALES | HIGH PRESSURE
REFRIGERATION SYSTEMS EXAM PREP
• This study guide features 200 verified multiple-choice questions with detailed
EXPERT RATIONALE covering every topic tested on the EPA Section 608 Type II
High-Pressure Systems Certification Exam — from refrigerant properties and
environmental regulations to recovery procedures and system components.
• Study by attempting each question independently before checking the bolded
correct answer and reading the EXPERT RATIONALE beneath it to solidify your
understanding of each concept.
━━━━━━━━━━━━━━━ EPA SECTION 608 TYPE II CERTIFICATION PRACTICE
EXAM HIGH-PRESSURE REFRIGERATION SYSTEMS | 200 QUESTIONS UPDATED
2026/2027 | VERIFIED WITH DETAILED EXPERT RATIONALE ━━━━━━━━━━━
━━━━━━━━━━
1. Which section of the Clean Air Act specifically prohibits the knowing
venting of refrigerants into the atmosphere?
A. Section 602
B. Section 605
C. Section 606
D. Section 608
E. Section 612
D. Section 608
EXPERT RATIONALE: Section 608 of the Clean Air Act establishes the national
recycling and emission reduction program. It explicitly prohibits the knowing
release (venting) of Class I, Class II refrigerants, and their substitutes during the
service, maintenance, repair, or disposal of appliances.
,2. Which of the following refrigerants is classified as a Type II (high-pressure)
refrigerant?
A. R-11
B. R-113
C. R-123
D. R-245fa
E. R-22
E. R-22
EXPERT RATIONALE: Type II refrigerants have boiling points between -50°C (-58°F)
and 10°C (50°F) at atmospheric pressure. R-22 (chlorodifluoromethane) has a
boiling point of approximately -40.8°C (-41.4°F), placing it firmly in the Type II (high-
pressure) category used primarily in residential and light commercial A/C systems.
3. R-410A operates at pressures approximately how much higher than R-22 at
the same temperature?
A. 10% higher
B. 25% higher
C. 50% higher
D. 70% higher
E. 200% higher
C. 50% higher
EXPERT RATIONALE: R-410A operates at pressures approximately 50–70% higher
than R-22 at equivalent operating temperatures. This higher pressure characteristic
requires that all system components — compressors, tubing, valves — be rated and
designed specifically for R-410A and cannot be used interchangeably with R-22
equipment without risk of failure.
,4. What is the boiling point of R-410A at atmospheric pressure?
A. -28.3°F (-33.5°C)
B. -41.4°F (-40.8°C)
C. -60.9°F (-51.6°C)
D. -15.0°F (-26.1°C)
E. -55.3°F (-48.5°C)
C. -60.9°F (-51.6°C)
EXPERT RATIONALE: R-410A has a boiling point of approximately -60.9°F (-51.6°C)
at atmospheric pressure, which is lower than R-22. Because this falls below -50°C,
some regulatory definitions technically push it toward Type III boundaries, but the
EPA classifies equipment using R-410A under the high-pressure appliance category
for Section 608 purposes.
5. Under EPA Section 608 regulations, technicians who purchase refrigerants
in containers larger than 2 pounds must be:
A. A licensed contractor only
B. An EPA-certified technician
C. A refrigerant manufacturer representative
D. A HVAC engineer
E. Any adult homeowner
B. An EPA-certified technician
EXPERT RATIONALE: EPA regulations require that any person purchasing
refrigerant in containers larger than 2 pounds must hold a valid Section 608
technician certification. This rule is designed to ensure that only properly trained
individuals handle refrigerants, reducing accidental releases and environmental
harm.
, 6. What does ODP stand for in refrigerant terminology?
A. Operational Depletion Parameter
B. Ozone Depletion Percentage
C. Ozone Depletion Potential
D. Oxygen Diffusion Point
E. Organic Decomposition Process
C. Ozone Depletion Potential
EXPERT RATIONALE: ODP (Ozone Depletion Potential) is a relative measure of a
substance's ability to destroy stratospheric ozone compared to R-11
(trichlorofluoromethane), which is assigned an ODP of 1.0. Refrigerants with higher
ODP values are more harmful to the ozone layer.
7. What is the ODP of R-22?
A. 0
B. 0.02
C. 0.05
D. 0.055
E. 1.0
D. 0.055
EXPERT RATIONALE: R-22 has an ODP of 0.055, meaning it depletes the ozone
layer at about 5.5% of the rate of R-11. While significantly lower than CFC
refrigerants, R-22 is still a Class II ozone-depleting substance under the Clean Air
Act, which led to its phase-out under the Montreal Protocol.
8. What is the ODP of R-410A?
A. 0.055
PRACTICE EXAM STUDY GUIDE UPDATED
2026/2027 | VERIFIED QUESTIONS AND ANSWERS
WITH DETAILED RATIONALES | HIGH PRESSURE
REFRIGERATION SYSTEMS EXAM PREP
• This study guide features 200 verified multiple-choice questions with detailed
EXPERT RATIONALE covering every topic tested on the EPA Section 608 Type II
High-Pressure Systems Certification Exam — from refrigerant properties and
environmental regulations to recovery procedures and system components.
• Study by attempting each question independently before checking the bolded
correct answer and reading the EXPERT RATIONALE beneath it to solidify your
understanding of each concept.
━━━━━━━━━━━━━━━ EPA SECTION 608 TYPE II CERTIFICATION PRACTICE
EXAM HIGH-PRESSURE REFRIGERATION SYSTEMS | 200 QUESTIONS UPDATED
2026/2027 | VERIFIED WITH DETAILED EXPERT RATIONALE ━━━━━━━━━━━
━━━━━━━━━━
1. Which section of the Clean Air Act specifically prohibits the knowing
venting of refrigerants into the atmosphere?
A. Section 602
B. Section 605
C. Section 606
D. Section 608
E. Section 612
D. Section 608
EXPERT RATIONALE: Section 608 of the Clean Air Act establishes the national
recycling and emission reduction program. It explicitly prohibits the knowing
release (venting) of Class I, Class II refrigerants, and their substitutes during the
service, maintenance, repair, or disposal of appliances.
,2. Which of the following refrigerants is classified as a Type II (high-pressure)
refrigerant?
A. R-11
B. R-113
C. R-123
D. R-245fa
E. R-22
E. R-22
EXPERT RATIONALE: Type II refrigerants have boiling points between -50°C (-58°F)
and 10°C (50°F) at atmospheric pressure. R-22 (chlorodifluoromethane) has a
boiling point of approximately -40.8°C (-41.4°F), placing it firmly in the Type II (high-
pressure) category used primarily in residential and light commercial A/C systems.
3. R-410A operates at pressures approximately how much higher than R-22 at
the same temperature?
A. 10% higher
B. 25% higher
C. 50% higher
D. 70% higher
E. 200% higher
C. 50% higher
EXPERT RATIONALE: R-410A operates at pressures approximately 50–70% higher
than R-22 at equivalent operating temperatures. This higher pressure characteristic
requires that all system components — compressors, tubing, valves — be rated and
designed specifically for R-410A and cannot be used interchangeably with R-22
equipment without risk of failure.
,4. What is the boiling point of R-410A at atmospheric pressure?
A. -28.3°F (-33.5°C)
B. -41.4°F (-40.8°C)
C. -60.9°F (-51.6°C)
D. -15.0°F (-26.1°C)
E. -55.3°F (-48.5°C)
C. -60.9°F (-51.6°C)
EXPERT RATIONALE: R-410A has a boiling point of approximately -60.9°F (-51.6°C)
at atmospheric pressure, which is lower than R-22. Because this falls below -50°C,
some regulatory definitions technically push it toward Type III boundaries, but the
EPA classifies equipment using R-410A under the high-pressure appliance category
for Section 608 purposes.
5. Under EPA Section 608 regulations, technicians who purchase refrigerants
in containers larger than 2 pounds must be:
A. A licensed contractor only
B. An EPA-certified technician
C. A refrigerant manufacturer representative
D. A HVAC engineer
E. Any adult homeowner
B. An EPA-certified technician
EXPERT RATIONALE: EPA regulations require that any person purchasing
refrigerant in containers larger than 2 pounds must hold a valid Section 608
technician certification. This rule is designed to ensure that only properly trained
individuals handle refrigerants, reducing accidental releases and environmental
harm.
, 6. What does ODP stand for in refrigerant terminology?
A. Operational Depletion Parameter
B. Ozone Depletion Percentage
C. Ozone Depletion Potential
D. Oxygen Diffusion Point
E. Organic Decomposition Process
C. Ozone Depletion Potential
EXPERT RATIONALE: ODP (Ozone Depletion Potential) is a relative measure of a
substance's ability to destroy stratospheric ozone compared to R-11
(trichlorofluoromethane), which is assigned an ODP of 1.0. Refrigerants with higher
ODP values are more harmful to the ozone layer.
7. What is the ODP of R-22?
A. 0
B. 0.02
C. 0.05
D. 0.055
E. 1.0
D. 0.055
EXPERT RATIONALE: R-22 has an ODP of 0.055, meaning it depletes the ozone
layer at about 5.5% of the rate of R-11. While significantly lower than CFC
refrigerants, R-22 is still a Class II ozone-depleting substance under the Clean Air
Act, which led to its phase-out under the Montreal Protocol.
8. What is the ODP of R-410A?
A. 0.055
