EPA 608 UNIVERSAL EXAM ACTUAL200 QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ NEW!!!!!!!!!!!!!!!!!!!!!!!!
The EPA 608 Universal Certification is the highest level of U.S.
Environmental Protection Agency certification for technicians handling
refrigerants. It authorizes professionals to work on all types of HVAC and
refrigeration equipment, including small appliances, high-pressure systems,
and low-pressure chillers. The exam covers ozone depletion, global warming
potential, recovery procedures, leak repair triggers, and safe handling of
CFCs, HCFCs, HFCs, and natural refrigerants. Technicians must
demonstrate competency in recovering, recycling, and reclaiming refrigerants
without venting, complying with Clean Air Act regulations. Passing the
Universal exam ensures legal compliance, environmental protection, and
career advancement in the HVAC industry.
1. What is the primary purpose of the Clean Air Act Amendments of 1990
regarding refrigerants?
A) To ban all fluorinated gases
B) To phase out ozone-depleting substances
C) To promote ammonia refrigeration only
D) To eliminate refrigerant recycling
Correct Answer: B
Rationale: The Clean Air Act Amendments of 1990 mandated the phase-out of
ozone-depleting substances (ODS) like CFCs and HCFCs to protect the
stratospheric ozone layer, aligning with the Montreal Protocol .
2. Which refrigerant has the highest ozone depletion potential (ODP)?
A) R-134a
B) R-410A
C) R-12
D) R-1234yf
Correct Answer: C
Rationale: R-12 is a CFC with an ODP of 1.0, the baseline for ozone depletion.
R-134a and R-410A are HFCs with 0 ODP, and R-1234yf is an HFO with near-
zero ODP .
,3. What does the term "Global Warming Potential" (GWP) measure?
A) Ozone layer damage
B) Heat absorption capacity of a gas compared to CO2
C) Toxicity level of refrigerant
D) Flammability rating
Correct Answer: B
Rationale: GWP quantifies how much heat a greenhouse gas traps in the
atmosphere over 100 years, relative to carbon dioxide (CO2 = 1) .
4. According to EPA 608, who can purchase refrigerants?
A) Any adult over 18
B) Only EPA-certified technicians
C) Only licensed HVAC contractors
D) Any person with a business license
Correct Answer: B
Rationale: Under Section 608, only EPA-certified technicians can purchase
refrigerants in containers smaller than 20 lbs (or any size if not pre-charged
equipment) .
5. What is the maximum allowable leak rate for commercial refrigeration systems
with a 50 lb charge under EPA 608?
A) 15%
B) 20%
C) 30%
D) 35%
Correct Answer: D
Rationale: For commercial refrigeration systems (50+ lbs), the leak repair trigger
is 35% annually. For industrial process refrigeration, it's 35% (with a 30% trigger
for comfort cooling) .
6. Which refrigerant is exempt from the venting prohibition under EPA 608?
A) R-22
B) R-134a
C) R-744 (CO2)
D) R-123
Correct Answer: C
Rationale: CO2 (R-744) is a natural refrigerant with no ODP and negligible
GWP. It is not an ODS or HFC, so venting is allowed, though generally
discouraged due to safety concerns .
,7. What is the required evacuation level for a recovery machine used on a system
with R-410A?
A) 0 psig
B) 10 inches of vacuum
C) 15 inches of vacuum
D) 29.9 inches of vacuum
Correct Answer: D
Rationale: R-410A is a high-pressure system. For recovery, it is recommended
to pull a deep vacuum; the standard for system evacuation is 500 microns or 29.9
inches of vacuum to ensure non-condensables and moisture are removed .
8. What is the required evacuation level for a small appliance recovery?
A) 0 psig
B) 4 inches of vacuum
C) 10 inches of vacuum
D) 15 inches of vacuum
Correct Answer: B
Rationale: For small appliances using a system-dependent recovery device, the
EPA requires recovery to 4 inches of mercury vacuum (or 0 psig if the appliance is
non-operational) .
9. Who enforces EPA 608 regulations?
A) Local police
B) EPA and authorized state agencies
C) OSHA
D) FBI
Correct Answer: B
Rationale: The EPA enforces Section 608, often delegating enforcement to
authorized state environmental agencies .
10. What is the definition of a "small appliance" under EPA 608?
A) Any system under 5 lbs of refrigerant
B) Refrigerators, freezers, window AC, dehumidifiers, and room AC
(hermetically sealed under 5 lbs)
C) Any system with a compressor under 1 HP
D) Only residential refrigerators
Correct Answer: B
, Rationale: Small appliances are fully manufactured, hermetically sealed systems
with less than 5 lbs of refrigerant, including refrigerators, freezers, room ACs,
dehumidifiers, and vending machines .
11. What is the maximum pressure for system-dependent recovery on a small
appliance?
A) 0 psig
B) 10 inches of vacuum
C) 4 inches of vacuum
D) 15 inches of vacuum
Correct Answer: C (4 inches of vacuum)
Rationale: For small appliances using a system-dependent recovery device, the
EPA requires recovery to 4 inches of mercury vacuum (or 0 psig if the appliance is
non-operational) .
12. Which type of refrigerant has the highest ozone depletion potential?
A) HFCs
B) HCFCs
C) CFCs
D) HFOs
Correct Answer: C
Rationale: CFCs (Chlorofluorocarbons) have the highest ODP as they contain
chlorine and are very stable in the atmosphere, allowing them to reach and deplete
the stratospheric ozone layer.
13. What is the Montreal Protocol?
A) A treaty to reduce greenhouse gas emissions
B) An international treaty designed to protect the ozone layer by phasing out
ODS
C) A law regulating the disposal of electronic waste
D) An agreement to limit refrigerant production only in the U.S.
Correct Answer: B
Rationale: The Montreal Protocol is an international treaty designed to protect
the ozone layer by phasing out the production and consumption of ozone-depleting
substances .
14. Under EPA 608, what is the maximum fine for venting refrigerants?
A) $1,000 per day
B) $5,000 per day
C) $10,000 per day
CORRECT ANSWERS WITH RATIONALE ALREADY
GRADED A+ NEW!!!!!!!!!!!!!!!!!!!!!!!!
The EPA 608 Universal Certification is the highest level of U.S.
Environmental Protection Agency certification for technicians handling
refrigerants. It authorizes professionals to work on all types of HVAC and
refrigeration equipment, including small appliances, high-pressure systems,
and low-pressure chillers. The exam covers ozone depletion, global warming
potential, recovery procedures, leak repair triggers, and safe handling of
CFCs, HCFCs, HFCs, and natural refrigerants. Technicians must
demonstrate competency in recovering, recycling, and reclaiming refrigerants
without venting, complying with Clean Air Act regulations. Passing the
Universal exam ensures legal compliance, environmental protection, and
career advancement in the HVAC industry.
1. What is the primary purpose of the Clean Air Act Amendments of 1990
regarding refrigerants?
A) To ban all fluorinated gases
B) To phase out ozone-depleting substances
C) To promote ammonia refrigeration only
D) To eliminate refrigerant recycling
Correct Answer: B
Rationale: The Clean Air Act Amendments of 1990 mandated the phase-out of
ozone-depleting substances (ODS) like CFCs and HCFCs to protect the
stratospheric ozone layer, aligning with the Montreal Protocol .
2. Which refrigerant has the highest ozone depletion potential (ODP)?
A) R-134a
B) R-410A
C) R-12
D) R-1234yf
Correct Answer: C
Rationale: R-12 is a CFC with an ODP of 1.0, the baseline for ozone depletion.
R-134a and R-410A are HFCs with 0 ODP, and R-1234yf is an HFO with near-
zero ODP .
,3. What does the term "Global Warming Potential" (GWP) measure?
A) Ozone layer damage
B) Heat absorption capacity of a gas compared to CO2
C) Toxicity level of refrigerant
D) Flammability rating
Correct Answer: B
Rationale: GWP quantifies how much heat a greenhouse gas traps in the
atmosphere over 100 years, relative to carbon dioxide (CO2 = 1) .
4. According to EPA 608, who can purchase refrigerants?
A) Any adult over 18
B) Only EPA-certified technicians
C) Only licensed HVAC contractors
D) Any person with a business license
Correct Answer: B
Rationale: Under Section 608, only EPA-certified technicians can purchase
refrigerants in containers smaller than 20 lbs (or any size if not pre-charged
equipment) .
5. What is the maximum allowable leak rate for commercial refrigeration systems
with a 50 lb charge under EPA 608?
A) 15%
B) 20%
C) 30%
D) 35%
Correct Answer: D
Rationale: For commercial refrigeration systems (50+ lbs), the leak repair trigger
is 35% annually. For industrial process refrigeration, it's 35% (with a 30% trigger
for comfort cooling) .
6. Which refrigerant is exempt from the venting prohibition under EPA 608?
A) R-22
B) R-134a
C) R-744 (CO2)
D) R-123
Correct Answer: C
Rationale: CO2 (R-744) is a natural refrigerant with no ODP and negligible
GWP. It is not an ODS or HFC, so venting is allowed, though generally
discouraged due to safety concerns .
,7. What is the required evacuation level for a recovery machine used on a system
with R-410A?
A) 0 psig
B) 10 inches of vacuum
C) 15 inches of vacuum
D) 29.9 inches of vacuum
Correct Answer: D
Rationale: R-410A is a high-pressure system. For recovery, it is recommended
to pull a deep vacuum; the standard for system evacuation is 500 microns or 29.9
inches of vacuum to ensure non-condensables and moisture are removed .
8. What is the required evacuation level for a small appliance recovery?
A) 0 psig
B) 4 inches of vacuum
C) 10 inches of vacuum
D) 15 inches of vacuum
Correct Answer: B
Rationale: For small appliances using a system-dependent recovery device, the
EPA requires recovery to 4 inches of mercury vacuum (or 0 psig if the appliance is
non-operational) .
9. Who enforces EPA 608 regulations?
A) Local police
B) EPA and authorized state agencies
C) OSHA
D) FBI
Correct Answer: B
Rationale: The EPA enforces Section 608, often delegating enforcement to
authorized state environmental agencies .
10. What is the definition of a "small appliance" under EPA 608?
A) Any system under 5 lbs of refrigerant
B) Refrigerators, freezers, window AC, dehumidifiers, and room AC
(hermetically sealed under 5 lbs)
C) Any system with a compressor under 1 HP
D) Only residential refrigerators
Correct Answer: B
, Rationale: Small appliances are fully manufactured, hermetically sealed systems
with less than 5 lbs of refrigerant, including refrigerators, freezers, room ACs,
dehumidifiers, and vending machines .
11. What is the maximum pressure for system-dependent recovery on a small
appliance?
A) 0 psig
B) 10 inches of vacuum
C) 4 inches of vacuum
D) 15 inches of vacuum
Correct Answer: C (4 inches of vacuum)
Rationale: For small appliances using a system-dependent recovery device, the
EPA requires recovery to 4 inches of mercury vacuum (or 0 psig if the appliance is
non-operational) .
12. Which type of refrigerant has the highest ozone depletion potential?
A) HFCs
B) HCFCs
C) CFCs
D) HFOs
Correct Answer: C
Rationale: CFCs (Chlorofluorocarbons) have the highest ODP as they contain
chlorine and are very stable in the atmosphere, allowing them to reach and deplete
the stratospheric ozone layer.
13. What is the Montreal Protocol?
A) A treaty to reduce greenhouse gas emissions
B) An international treaty designed to protect the ozone layer by phasing out
ODS
C) A law regulating the disposal of electronic waste
D) An agreement to limit refrigerant production only in the U.S.
Correct Answer: B
Rationale: The Montreal Protocol is an international treaty designed to protect
the ozone layer by phasing out the production and consumption of ozone-depleting
substances .
14. Under EPA 608, what is the maximum fine for venting refrigerants?
A) $1,000 per day
B) $5,000 per day
C) $10,000 per day
