EPA Section 608 Universal Technician Certification Exam
Practice Test Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of the Clean Air Act, Section 608?
A. To regulate the disposal of solid waste
B. To regulate refrigerant emissions and protect the ozone layer
C. To limit noise pollution from mechanical equipment
D. To restrict indoor air contaminants
Rationale: Section 608 specifically governs the handling of refrigerants to
prevent ozone depletion.
2. Which type of refrigerant has the highest ozone depletion potential
(ODP)?
A. HFCs
,B. HCFCs
C. CFCs
D. HFOs
Rationale: CFCs like R-12 have the highest ODP and are fully phased out
under the Montreal Protocol.
3. Which of the following refrigerants contains chlorine?
A. R-134a
B. R-22
C. R-410A
D. R-32
Rationale: R-22 is an HCFC that still contains chlorine, contributing to
ozone depletion.
4. What is the color code for R-22 cylinders?
A. Light blue
B. Green
C. Pink
D. Orange
Rationale: R-22 recovery cylinders are traditionally color-coded green.
5. What type of certification is required to service small appliances under 5
pounds of refrigerant?
A. Type I
B. Type II
C. Type III
,D. Universal
Rationale: Type I certification covers small appliances such as domestic
refrigerators and window AC units.
6. What type of certification is required for servicing low-pressure chillers?
A. Type I
B. Type II
C. Type III
D. Universal
Rationale: Type III technicians handle low-pressure systems like centrifugal
chillers using R-11 or R-123.
7. What is the required certification to work on all types of stationary
refrigeration systems?
A. Type II
B. Type III
C. Universal
D. Type I
Rationale: Universal certification includes all three categories — Type I, II,
and III — plus Core.
8. What does ODP stand for?
A. Operational Design Pressure
B. Ozone Depletion Potential
C. Overall Density Parameter
D. Oxygen Dilution Percentage
, Rationale: ODP measures a refrigerant’s potential to harm the ozone layer
compared to CFC-11.
9. Which component in a refrigeration system absorbs heat?
A. Condenser
B. Evaporator
C. Compressor
D. Receiver
Rationale: The evaporator absorbs heat from the conditioned space into
the refrigerant.
10. What component in a system changes low-pressure vapor to high-
pressure vapor?
A. Condenser
B. Evaporator
C. Compressor
D. Expansion device
Rationale: The compressor raises the refrigerant pressure and temperature
to facilitate heat rejection.
11. What is the primary reason for using recovery cylinders?
A. For storing new refrigerant
B. For reclaiming or recovering used refrigerant
C. For transporting compressed air
D. For system pressurization
Practice Test Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of the Clean Air Act, Section 608?
A. To regulate the disposal of solid waste
B. To regulate refrigerant emissions and protect the ozone layer
C. To limit noise pollution from mechanical equipment
D. To restrict indoor air contaminants
Rationale: Section 608 specifically governs the handling of refrigerants to
prevent ozone depletion.
2. Which type of refrigerant has the highest ozone depletion potential
(ODP)?
A. HFCs
,B. HCFCs
C. CFCs
D. HFOs
Rationale: CFCs like R-12 have the highest ODP and are fully phased out
under the Montreal Protocol.
3. Which of the following refrigerants contains chlorine?
A. R-134a
B. R-22
C. R-410A
D. R-32
Rationale: R-22 is an HCFC that still contains chlorine, contributing to
ozone depletion.
4. What is the color code for R-22 cylinders?
A. Light blue
B. Green
C. Pink
D. Orange
Rationale: R-22 recovery cylinders are traditionally color-coded green.
5. What type of certification is required to service small appliances under 5
pounds of refrigerant?
A. Type I
B. Type II
C. Type III
,D. Universal
Rationale: Type I certification covers small appliances such as domestic
refrigerators and window AC units.
6. What type of certification is required for servicing low-pressure chillers?
A. Type I
B. Type II
C. Type III
D. Universal
Rationale: Type III technicians handle low-pressure systems like centrifugal
chillers using R-11 or R-123.
7. What is the required certification to work on all types of stationary
refrigeration systems?
A. Type II
B. Type III
C. Universal
D. Type I
Rationale: Universal certification includes all three categories — Type I, II,
and III — plus Core.
8. What does ODP stand for?
A. Operational Design Pressure
B. Ozone Depletion Potential
C. Overall Density Parameter
D. Oxygen Dilution Percentage
, Rationale: ODP measures a refrigerant’s potential to harm the ozone layer
compared to CFC-11.
9. Which component in a refrigeration system absorbs heat?
A. Condenser
B. Evaporator
C. Compressor
D. Receiver
Rationale: The evaporator absorbs heat from the conditioned space into
the refrigerant.
10. What component in a system changes low-pressure vapor to high-
pressure vapor?
A. Condenser
B. Evaporator
C. Compressor
D. Expansion device
Rationale: The compressor raises the refrigerant pressure and temperature
to facilitate heat rejection.
11. What is the primary reason for using recovery cylinders?
A. For storing new refrigerant
B. For reclaiming or recovering used refrigerant
C. For transporting compressed air
D. For system pressurization
