EPA 608 UNIVERSAL EXAM 200 ACTUAL QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE LATEST 2026
ALREADY GRADED A+
The EPA 608 Universal Certification exam is a federal requirement for
technicians who handle, service, or dispose of refrigerants in stationary
HVAC and refrigeration equipment. The exam consists of four sections: Core,
Type I (small appliances), Type II (high-pressure appliances), and Type III
(low-pressure appliances). Passing all sections earns the Universal
certification, allowing technicians to work on all types of equipment. Key
topics include refrigerant recovery, recycling, and reclaiming procedures, leak
repair requirements, safe handling practices, ozone depletion and global
warming regulations, system evacuation, charging techniques, and compliance
with the Clean Air Act. Certification is valid for life and is essential for legal
refrigerant handling.
1. Which refrigerant is considered a "low-pressure" refrigerant for EPA Type III
certification purposes?
A) R-22
B) R-410A
C) R-123
D) R-134a
Correct Answer: C
Rationale: Type III certification covers low-pressure appliances, typically those
using refrigerants with a boiling point above 50°F at atmospheric pressure, such as
R-123 and R-11. R-22, R-410A, and R-134a are high-pressure refrigerants covered
under Type II.
2. What is the maximum allowable leak rate for a system containing 50 pounds or
more of R-22?
A) 15% per year
B) 35% per year
C) 10% per year
D) 20% per year
Correct Answer: A
Rationale: Under EPA regulations, the maximum allowable leak rate for R-22
systems is 15% per year. For R-410A systems, the threshold was 15% initially, but
,was lowered to 10% in 2019. R-22 systems with 50+ pounds must be repaired
when the leak rate exceeds 15% annually.
3. Which of the following is the proper cylinder color for R-410A?
A) Rose
B) Light blue
C) Green
D) Orange
Correct Answer: A
Rationale: R-410A cylinders are rose (pink) in color, while R-22 cylinders are light
green. R-134a cylinders are light blue, and R-123 cylinders are light blue with a
yellow band.
4. A technician can legally use an appliance's system-dependent recovery
equipment without a recovery machine if:
A) The system contains less than 15 pounds of refrigerant
B) The system has a working compressor
C) The system contains less than 5 pounds of refrigerant
D) The system is a low-pressure chiller
Correct Answer: A
Rationale: System-dependent (passive) recovery equipment may be used on
appliances containing less than 15 pounds of refrigerant. This includes using the
system's own compressor or other internal pressure to facilitate recovery.
5. What is the primary purpose of the Montreal Protocol?
A) To phase out ozone-depleting substances
B) To reduce greenhouse gas emissions
C) To establish refrigerant safety standards
D) To regulate refrigerant pricing
Correct Answer: A
Rationale: The Montreal Protocol, established in 1987, is an international treaty
designed to phase out the production and consumption of ozone-depleting
substances (ODS), including CFCs and HCFCs, to protect the stratospheric ozone
layer.
6. Which gas is commonly used to pressurize and leak test a refrigeration system?
A) Oxygen
B) Nitrogen
C) Hydrogen
D) Carbon dioxide
,Correct Answer: B
Rationale: Nitrogen is the preferred gas for pressurizing and leak testing refrigerant
systems because it is inert, dry, and does not react with system components or
refrigerants. Oxygen should never be used as it can cause explosions with oil.
7. What is the requirement for a technician to recover refrigerant from a low-
pressure appliance?
A) Must achieve 0 psig vacuum
B) Must achieve 25 inches Hg vacuum
C) Must achieve 10 inches Hg vacuum
D) Must recover to 15 psig
Correct Answer: B
Rationale: For low-pressure appliances (Type III), technicians must evacuate the
system to 25 inches of mercury (Hg) vacuum (or 25 mm Hg absolute pressure) to
meet EPA recovery requirements.
8. Which type of refrigerant has the highest ozone depletion potential (ODP)?
A) HFC
B) HCFC
C) CFC
D) HFO
Correct Answer: C
Rationale: CFCs (chlorofluorocarbons) have the highest ozone depletion potential.
HCFCs have a lower ODP, and HFCs and HFOs have zero ODP.
9. What does the term "reclaim" mean in refrigerant management?
A) To clean refrigerant to meet AHRI Standard 700 purity specifications
B) To reuse refrigerant without cleaning
C) To dispose of refrigerant
D) To convert refrigerant to a different type
Correct Answer: A
Rationale: Reclaiming refrigerant involves processing it to meet AHRI Standard
700 purity specifications. Unlike recycling, reclaiming requires testing to ensure
the refrigerant meets industry standards for reuse.
10. What is the maximum allowable leak rate for a system containing 50 pounds or
more of R-410A?
A) 15%
B) 20%
C) 10%
, D) 35%
Correct Answer: C
Rationale: As of 2019, systems containing R-410A (a high-GWP HFC) with 50+
pounds have a maximum allowable leak rate of 10% per year. This stricter
requirement was part of EPA's efforts to reduce high-GWP refrigerant emissions.
11. What is the typical pressure of a recovery cylinder when filling with
refrigerant?
A) 200 psig
B) 80% full by weight
C) 100% full by weight
D) 150 psig
Correct Answer: B
Rationale: Recovery cylinders must not be filled beyond 80% of their capacity by
weight. DOT regulations require this safety margin to prevent hydrostatic pressure
buildup if the cylinder is exposed to high temperatures.
12. Which of the following is NOT an ODP refrigerant?
A) R-12
B) R-22
C) R-134a
D) R-11
Correct Answer: C
Rationale: R-134a is an HFC refrigerant with zero ozone depletion potential
(ODP). R-12 and R-11 are CFCs with high ODP, and R-22 is an HCFC with low
ODP.
13. What safety color is used for R-22 cylinders?
A) Rose
B) Light blue
C) Green
D) Orange
Correct Answer: C
Rationale: R-22 cylinders are color-coded light green. R-410A cylinders are rose,
R-134a cylinders are light blue, and R-123 cylinders are light blue with a yellow
band.
14. What does "subcooling" measure in a refrigeration system?
A) Amount of liquid refrigerant above saturation temperature
B) Amount of vapor refrigerant above saturation temperature
CORRECT ANSWERS WITH RATIONALE LATEST 2026
ALREADY GRADED A+
The EPA 608 Universal Certification exam is a federal requirement for
technicians who handle, service, or dispose of refrigerants in stationary
HVAC and refrigeration equipment. The exam consists of four sections: Core,
Type I (small appliances), Type II (high-pressure appliances), and Type III
(low-pressure appliances). Passing all sections earns the Universal
certification, allowing technicians to work on all types of equipment. Key
topics include refrigerant recovery, recycling, and reclaiming procedures, leak
repair requirements, safe handling practices, ozone depletion and global
warming regulations, system evacuation, charging techniques, and compliance
with the Clean Air Act. Certification is valid for life and is essential for legal
refrigerant handling.
1. Which refrigerant is considered a "low-pressure" refrigerant for EPA Type III
certification purposes?
A) R-22
B) R-410A
C) R-123
D) R-134a
Correct Answer: C
Rationale: Type III certification covers low-pressure appliances, typically those
using refrigerants with a boiling point above 50°F at atmospheric pressure, such as
R-123 and R-11. R-22, R-410A, and R-134a are high-pressure refrigerants covered
under Type II.
2. What is the maximum allowable leak rate for a system containing 50 pounds or
more of R-22?
A) 15% per year
B) 35% per year
C) 10% per year
D) 20% per year
Correct Answer: A
Rationale: Under EPA regulations, the maximum allowable leak rate for R-22
systems is 15% per year. For R-410A systems, the threshold was 15% initially, but
,was lowered to 10% in 2019. R-22 systems with 50+ pounds must be repaired
when the leak rate exceeds 15% annually.
3. Which of the following is the proper cylinder color for R-410A?
A) Rose
B) Light blue
C) Green
D) Orange
Correct Answer: A
Rationale: R-410A cylinders are rose (pink) in color, while R-22 cylinders are light
green. R-134a cylinders are light blue, and R-123 cylinders are light blue with a
yellow band.
4. A technician can legally use an appliance's system-dependent recovery
equipment without a recovery machine if:
A) The system contains less than 15 pounds of refrigerant
B) The system has a working compressor
C) The system contains less than 5 pounds of refrigerant
D) The system is a low-pressure chiller
Correct Answer: A
Rationale: System-dependent (passive) recovery equipment may be used on
appliances containing less than 15 pounds of refrigerant. This includes using the
system's own compressor or other internal pressure to facilitate recovery.
5. What is the primary purpose of the Montreal Protocol?
A) To phase out ozone-depleting substances
B) To reduce greenhouse gas emissions
C) To establish refrigerant safety standards
D) To regulate refrigerant pricing
Correct Answer: A
Rationale: The Montreal Protocol, established in 1987, is an international treaty
designed to phase out the production and consumption of ozone-depleting
substances (ODS), including CFCs and HCFCs, to protect the stratospheric ozone
layer.
6. Which gas is commonly used to pressurize and leak test a refrigeration system?
A) Oxygen
B) Nitrogen
C) Hydrogen
D) Carbon dioxide
,Correct Answer: B
Rationale: Nitrogen is the preferred gas for pressurizing and leak testing refrigerant
systems because it is inert, dry, and does not react with system components or
refrigerants. Oxygen should never be used as it can cause explosions with oil.
7. What is the requirement for a technician to recover refrigerant from a low-
pressure appliance?
A) Must achieve 0 psig vacuum
B) Must achieve 25 inches Hg vacuum
C) Must achieve 10 inches Hg vacuum
D) Must recover to 15 psig
Correct Answer: B
Rationale: For low-pressure appliances (Type III), technicians must evacuate the
system to 25 inches of mercury (Hg) vacuum (or 25 mm Hg absolute pressure) to
meet EPA recovery requirements.
8. Which type of refrigerant has the highest ozone depletion potential (ODP)?
A) HFC
B) HCFC
C) CFC
D) HFO
Correct Answer: C
Rationale: CFCs (chlorofluorocarbons) have the highest ozone depletion potential.
HCFCs have a lower ODP, and HFCs and HFOs have zero ODP.
9. What does the term "reclaim" mean in refrigerant management?
A) To clean refrigerant to meet AHRI Standard 700 purity specifications
B) To reuse refrigerant without cleaning
C) To dispose of refrigerant
D) To convert refrigerant to a different type
Correct Answer: A
Rationale: Reclaiming refrigerant involves processing it to meet AHRI Standard
700 purity specifications. Unlike recycling, reclaiming requires testing to ensure
the refrigerant meets industry standards for reuse.
10. What is the maximum allowable leak rate for a system containing 50 pounds or
more of R-410A?
A) 15%
B) 20%
C) 10%
, D) 35%
Correct Answer: C
Rationale: As of 2019, systems containing R-410A (a high-GWP HFC) with 50+
pounds have a maximum allowable leak rate of 10% per year. This stricter
requirement was part of EPA's efforts to reduce high-GWP refrigerant emissions.
11. What is the typical pressure of a recovery cylinder when filling with
refrigerant?
A) 200 psig
B) 80% full by weight
C) 100% full by weight
D) 150 psig
Correct Answer: B
Rationale: Recovery cylinders must not be filled beyond 80% of their capacity by
weight. DOT regulations require this safety margin to prevent hydrostatic pressure
buildup if the cylinder is exposed to high temperatures.
12. Which of the following is NOT an ODP refrigerant?
A) R-12
B) R-22
C) R-134a
D) R-11
Correct Answer: C
Rationale: R-134a is an HFC refrigerant with zero ozone depletion potential
(ODP). R-12 and R-11 are CFCs with high ODP, and R-22 is an HCFC with low
ODP.
13. What safety color is used for R-22 cylinders?
A) Rose
B) Light blue
C) Green
D) Orange
Correct Answer: C
Rationale: R-22 cylinders are color-coded light green. R-410A cylinders are rose,
R-134a cylinders are light blue, and R-123 cylinders are light blue with a yellow
band.
14. What does "subcooling" measure in a refrigeration system?
A) Amount of liquid refrigerant above saturation temperature
B) Amount of vapor refrigerant above saturation temperature
