EPA Section 608 Universal Certification
Exam With Actual Questions & Verified
Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Updated/Instant Download Pdf
1. What is the primary purpose of the Clean Air Act in relation to
refrigerants?
A. To increase refrigerant production
B. To protect the ozone layer
C. To regulate electrical codes
D. To reduce water pollution
B. To protect the ozone layer
Rationale: The Clean Air Act regulates the production, use, and
disposal of ozone-depleting substances, including refrigerants, to
protect the ozone layer.
2. Which type of refrigerant requires recovery before servicing
equipment?
A. Non-ozone-depleting refrigerants
B. Ozone-depleting refrigerants
C. Water-based refrigerants
D. Any refrigerant under 5 pounds
B. Ozone-depleting refrigerants
Rationale: EPA regulations require recovery of all ozone-
, depleting refrigerants to prevent their release into the
atmosphere.
3. Which EPA certification type allows you to service all types of
equipment containing regulated refrigerants?
A. Type I
B. Type II
C. Type III
D. Universal
D. Universal
Rationale: Universal certification allows a technician to service
small, high-pressure, and low-pressure systems.
4. Which of the following refrigerants has zero Ozone Depletion
Potential (ODP)?
A. R-22
B. R-123
C. R-134a
D. R-11
C. R-134a
Rationale: R-134a is an HFC with no chlorine atoms, meaning it
has zero ODP.
5. What is the first step before opening a refrigerant circuit for
service?
A. Evacuate the system
B. Recover refrigerant
C. Charge the system
D. Measure pressure
B. Recover refrigerant
Rationale: Refrigerant must be properly recovered before
opening a system to prevent release into the atmosphere.
,6. Which tool is required to measure refrigerant pressure
accurately?
A. Thermometer
B. Manifold gauge set
C. Amperage meter
D. Hydrometer
B. Manifold gauge set
Rationale: Manifold gauges are specifically designed to read
refrigerant pressures for various types of systems.
7. Which of the following is considered a high-pressure refrigerant?
A. R-12
B. R-134a
C. R-22
D. R-502
D. R-502
Rationale: R-502 is classified as a high-pressure refrigerant
commonly used in low-temperature applications.
8. What is the purpose of a refrigerant recovery unit?
A. To increase system efficiency
B. To safely remove refrigerant from a system
C. To test system pressure
D. To heat the refrigerant
B. To safely remove refrigerant from a system
Rationale: Recovery units are designed to remove refrigerants
without releasing them into the atmosphere.
9. What is the maximum safe pressure for a low-pressure recovery
cylinder?
A. 15 psig
B. 100 psig
, C. 250 psig
D. 500 psig
C. 250 psig
Rationale: Low-pressure recovery cylinders are designed for
pressures up to 250 psig, such as for R-11 and R-123 systems.
10. What is a common symptom of a refrigerant leak?
A. High compressor efficiency
B. Frost on evaporator coils
C. Low system pressure
D. High suction pressure
C. Low system pressure
Rationale: A refrigerant leak reduces the system’s charge,
causing lower pressures and reduced cooling performance.
11. Which type of system typically uses R-22?
A. Large commercial low-pressure chiller
B. Automotive A/C
C. Small domestic refrigerator
D. Industrial ammonia system
B. Automotive A/C
Rationale: R-22 is a high-pressure HFC commonly used in
residential and automotive systems, although it is being phased
out.
12. When using a vacuum pump, what is the desired level of
evacuation?
A. 50 microns
B. 500 microns
C. 50 psig
D. 500 psig
A. 50 microns
Exam With Actual Questions & Verified
Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Updated/Instant Download Pdf
1. What is the primary purpose of the Clean Air Act in relation to
refrigerants?
A. To increase refrigerant production
B. To protect the ozone layer
C. To regulate electrical codes
D. To reduce water pollution
B. To protect the ozone layer
Rationale: The Clean Air Act regulates the production, use, and
disposal of ozone-depleting substances, including refrigerants, to
protect the ozone layer.
2. Which type of refrigerant requires recovery before servicing
equipment?
A. Non-ozone-depleting refrigerants
B. Ozone-depleting refrigerants
C. Water-based refrigerants
D. Any refrigerant under 5 pounds
B. Ozone-depleting refrigerants
Rationale: EPA regulations require recovery of all ozone-
, depleting refrigerants to prevent their release into the
atmosphere.
3. Which EPA certification type allows you to service all types of
equipment containing regulated refrigerants?
A. Type I
B. Type II
C. Type III
D. Universal
D. Universal
Rationale: Universal certification allows a technician to service
small, high-pressure, and low-pressure systems.
4. Which of the following refrigerants has zero Ozone Depletion
Potential (ODP)?
A. R-22
B. R-123
C. R-134a
D. R-11
C. R-134a
Rationale: R-134a is an HFC with no chlorine atoms, meaning it
has zero ODP.
5. What is the first step before opening a refrigerant circuit for
service?
A. Evacuate the system
B. Recover refrigerant
C. Charge the system
D. Measure pressure
B. Recover refrigerant
Rationale: Refrigerant must be properly recovered before
opening a system to prevent release into the atmosphere.
,6. Which tool is required to measure refrigerant pressure
accurately?
A. Thermometer
B. Manifold gauge set
C. Amperage meter
D. Hydrometer
B. Manifold gauge set
Rationale: Manifold gauges are specifically designed to read
refrigerant pressures for various types of systems.
7. Which of the following is considered a high-pressure refrigerant?
A. R-12
B. R-134a
C. R-22
D. R-502
D. R-502
Rationale: R-502 is classified as a high-pressure refrigerant
commonly used in low-temperature applications.
8. What is the purpose of a refrigerant recovery unit?
A. To increase system efficiency
B. To safely remove refrigerant from a system
C. To test system pressure
D. To heat the refrigerant
B. To safely remove refrigerant from a system
Rationale: Recovery units are designed to remove refrigerants
without releasing them into the atmosphere.
9. What is the maximum safe pressure for a low-pressure recovery
cylinder?
A. 15 psig
B. 100 psig
, C. 250 psig
D. 500 psig
C. 250 psig
Rationale: Low-pressure recovery cylinders are designed for
pressures up to 250 psig, such as for R-11 and R-123 systems.
10. What is a common symptom of a refrigerant leak?
A. High compressor efficiency
B. Frost on evaporator coils
C. Low system pressure
D. High suction pressure
C. Low system pressure
Rationale: A refrigerant leak reduces the system’s charge,
causing lower pressures and reduced cooling performance.
11. Which type of system typically uses R-22?
A. Large commercial low-pressure chiller
B. Automotive A/C
C. Small domestic refrigerator
D. Industrial ammonia system
B. Automotive A/C
Rationale: R-22 is a high-pressure HFC commonly used in
residential and automotive systems, although it is being phased
out.
12. When using a vacuum pump, what is the desired level of
evacuation?
A. 50 microns
B. 500 microns
C. 50 psig
D. 500 psig
A. 50 microns
