EPA SECTION 608 UNIVERSAL
CERTIFICATION EXAM QUESTION AND
CORRECT ANSWERS(VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. Which refrigerant is classified as an ozone-depleting substance (ODS)?
A. R-134a
B. R-410A
C. R-22
D. R-404A
Rationale: R-22 is an HCFC that contributes to ozone depletion, unlike
HFCs such as R-134a and R-410A.
2. EPA Section 608 regulations apply to which of the following?
A. Motor vehicle air conditioning systems only
B. Appliances containing less than 5 lbs of refrigerant
C. Stationary refrigeration and air-conditioning equipment
D. Portable refrigerators only
Rationale: Section 608 covers stationary appliances, while motor vehicles
fall under Section 609.
3. What is the required recovery level for high-pressure appliances when
using certified recovery equipment manufactured after Nov 15, 1993?
A. 0 psig
B. 10 inches of Hg vacuum
C. 15 psig
D. Atmospheric pressure
Rationale: EPA requires recovery to 10 inches of mercury vacuum for high-
pressure appliances.
,4. Which refrigerant has the highest ozone depletion potential (ODP)?
A. R-134a
B. R-11
C. R-410A
D. R-404A
Rationale: CFC-11 has one of the highest ODP values and is heavily
regulated.
5. Which certification allows a technician to work on all types of appliances?
A. Type I
B. Type II
C. Type III
D. Universal
Rationale: Universal certification combines Types I, II, and III.
6. Type I certification is required to service which appliances?
A. High-pressure systems
B. Low-pressure chillers
C. Small appliances containing 5 lbs or less of refrigerant
D. Industrial refrigeration systems
Rationale: Type I specifically covers small, factory-sealed appliances.
7. Which refrigerant is commonly used in low-pressure chillers?
A. R-22
B. R-410A
C. R-123
D. R-404A
Rationale: R-123 is a low-pressure refrigerant used in centrifugal chillers.
8. What must be done before opening a refrigeration system for service?
A. Add refrigerant
B. Recover refrigerant
C. Vent refrigerant
D. Increase system pressure
Rationale: Venting refrigerant is illegal; recovery is required.
9. Which leak rate threshold requires repair for commercial refrigeration?
A. 10% per year
, B. 20% per year
C. 30% per year
D. 5% per year
Rationale: EPA requires repair when leaks exceed 20% annually for
commercial systems.
10.What instrument is used to detect refrigerant leaks electronically?
A. Manifold gauge
B. Thermometer
C. Electronic leak detector
D. Vacuum pump
Rationale: Electronic leak detectors sense refrigerant in the air.
11.Which refrigerant is an HFC with zero ODP?
A. R-22
B. R-11
C. R-134a
D. R-12
Rationale: HFCs like R-134a do not deplete the ozone layer.
12.Recovery equipment must be certified by which organization?
A. OSHA
B. ASHRAE
C. EPA
D. UL
Rationale: The EPA approves and certifies refrigerant recovery equipment.
13.What is the main purpose of evacuation?
A. Add oil
B. Remove moisture and non-condensables
C. Increase pressure
D. Test electrical components
Rationale: Evacuation prevents system damage and inefficiency.
14.Which refrigerant is considered a blend?
A. R-22
CERTIFICATION EXAM QUESTION AND
CORRECT ANSWERS(VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
INSTANT DOWNLOAD PDF
1. Which refrigerant is classified as an ozone-depleting substance (ODS)?
A. R-134a
B. R-410A
C. R-22
D. R-404A
Rationale: R-22 is an HCFC that contributes to ozone depletion, unlike
HFCs such as R-134a and R-410A.
2. EPA Section 608 regulations apply to which of the following?
A. Motor vehicle air conditioning systems only
B. Appliances containing less than 5 lbs of refrigerant
C. Stationary refrigeration and air-conditioning equipment
D. Portable refrigerators only
Rationale: Section 608 covers stationary appliances, while motor vehicles
fall under Section 609.
3. What is the required recovery level for high-pressure appliances when
using certified recovery equipment manufactured after Nov 15, 1993?
A. 0 psig
B. 10 inches of Hg vacuum
C. 15 psig
D. Atmospheric pressure
Rationale: EPA requires recovery to 10 inches of mercury vacuum for high-
pressure appliances.
,4. Which refrigerant has the highest ozone depletion potential (ODP)?
A. R-134a
B. R-11
C. R-410A
D. R-404A
Rationale: CFC-11 has one of the highest ODP values and is heavily
regulated.
5. Which certification allows a technician to work on all types of appliances?
A. Type I
B. Type II
C. Type III
D. Universal
Rationale: Universal certification combines Types I, II, and III.
6. Type I certification is required to service which appliances?
A. High-pressure systems
B. Low-pressure chillers
C. Small appliances containing 5 lbs or less of refrigerant
D. Industrial refrigeration systems
Rationale: Type I specifically covers small, factory-sealed appliances.
7. Which refrigerant is commonly used in low-pressure chillers?
A. R-22
B. R-410A
C. R-123
D. R-404A
Rationale: R-123 is a low-pressure refrigerant used in centrifugal chillers.
8. What must be done before opening a refrigeration system for service?
A. Add refrigerant
B. Recover refrigerant
C. Vent refrigerant
D. Increase system pressure
Rationale: Venting refrigerant is illegal; recovery is required.
9. Which leak rate threshold requires repair for commercial refrigeration?
A. 10% per year
, B. 20% per year
C. 30% per year
D. 5% per year
Rationale: EPA requires repair when leaks exceed 20% annually for
commercial systems.
10.What instrument is used to detect refrigerant leaks electronically?
A. Manifold gauge
B. Thermometer
C. Electronic leak detector
D. Vacuum pump
Rationale: Electronic leak detectors sense refrigerant in the air.
11.Which refrigerant is an HFC with zero ODP?
A. R-22
B. R-11
C. R-134a
D. R-12
Rationale: HFCs like R-134a do not deplete the ozone layer.
12.Recovery equipment must be certified by which organization?
A. OSHA
B. ASHRAE
C. EPA
D. UL
Rationale: The EPA approves and certifies refrigerant recovery equipment.
13.What is the main purpose of evacuation?
A. Add oil
B. Remove moisture and non-condensables
C. Increase pressure
D. Test electrical components
Rationale: Evacuation prevents system damage and inefficiency.
14.Which refrigerant is considered a blend?
A. R-22
