EPA Section 608 Type II Certification
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
1. What does EPA Section 608 Type II certification primarily cover?
A. Small appliances
B. High-pressure and very-high-pressure appliances
C. Motor vehicle air-conditioning systems
D. Refrigeration appliances containing only ammonia
Answer: B. High-pressure and very-high-pressure appliances
Rationale: Type II certification covers technicians who service, repair, or dispose
of appliances containing high- or very-high-pressure refrigerants, with certain
exceptions such as small appliances and motor vehicle air conditioners.
2. Which refrigerant is classified as a high-pressure refrigerant?
A. R-11
B. R-123
C. R-22
D. R-113
Answer: C. R-22
Rationale: R-22 is a high-pressure refrigerant commonly used in residential and
commercial air-conditioning and refrigeration equipment.
, 3. What is the primary purpose of recovering refrigerant before opening a
refrigeration system?
A. To increase system pressure
B. To improve compressor lubrication
C. To prevent refrigerant from being released into the atmosphere
D. To increase refrigerant temperature
Answer: C. To prevent refrigerant from being released into the atmosphere
Rationale: Section 608 requires technicians to recover refrigerants rather than
intentionally vent them because many refrigerants contribute to ozone
depletion or climate change.
4. Which practice is prohibited under EPA Section 608?
A. Recovering refrigerant
B. Recycling refrigerant
C. Reclaiming refrigerant
D. Intentionally venting refrigerant during service
Answer: D. Intentionally venting refrigerant during service
Rationale: Intentional venting of regulated refrigerants during service,
maintenance, repair, or disposal is prohibited except for specific regulatory
exceptions.
5. What is the purpose of a recovery cylinder?
A. To store oxygen
B. To remove moisture from refrigerant
C. To temporarily contain recovered refrigerant
D. To increase compressor capacity
Answer: C. To temporarily contain recovered refrigerant
Rationale: Recovery cylinders are designed to safely hold refrigerant removed
from appliances during servicing.
, 6. Why should a recovery cylinder never be filled completely with liquid
refrigerant?
A. Refrigerant becomes contaminated
B. The cylinder loses its vacuum
C. Liquid refrigerant expands when heated and can cause dangerous pressure
buildup
D. The recovery machine will stop automatically
Answer: C. Liquid refrigerant expands when heated and can cause dangerous
pressure buildup
Rationale: Liquid refrigerant needs expansion space. Overfilling a cylinder can
create excessive hydrostatic pressure and present a serious safety hazard.
7. What is the maximum recommended filling level commonly used for
refrigerant recovery cylinders?
A. 50%
B. 70%
C. 80%
D. 100%
Answer: C. 80%
Rationale: Recovery cylinders are commonly filled to no more than 80% of their
water capacity by volume to provide sufficient expansion space.
8. Which condition can cause a recovery machine to operate slowly?
A. Warm ambient temperature
B. Noncondensable gases or excessive pressure in the system
C. Clean recovery hoses
D. A properly sized recovery cylinder
Answer: B. Noncondensable gases or excessive pressure in the system
, Rationale: Excessive system pressure can reduce recovery efficiency and increase
recovery time. Noncondensables can also adversely affect system and recovery
equipment performance.
9. What is the purpose of a filter-drier?
A. Increase refrigerant pressure
B. Remove moisture and contaminants from the refrigerant circuit
C. Increase compressor speed
D. Add refrigerant to the system
Answer: B. Remove moisture and contaminants from the refrigerant circuit
Rationale: Filter-driers capture moisture, acids, debris, and other contaminants
that could damage system components.
10.What happens when moisture enters a refrigeration system?
A. Compressor efficiency always increases
B. Refrigerant pressure becomes zero
C. It can react with refrigerant and oil to form acids and cause corrosion
D. The evaporator becomes larger
Answer: C. It can react with refrigerant and oil to form acids and cause corrosion
Rationale: Moisture can contribute to acid formation, corrosion, ice formation,
and compressor damage.
11.What instrument is commonly used to measure vacuum during evacuation?
A. Psychrometer
B. Ammeter
C. Micron gauge
D. Tachometer
Answer: C. Micron gauge
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
1. What does EPA Section 608 Type II certification primarily cover?
A. Small appliances
B. High-pressure and very-high-pressure appliances
C. Motor vehicle air-conditioning systems
D. Refrigeration appliances containing only ammonia
Answer: B. High-pressure and very-high-pressure appliances
Rationale: Type II certification covers technicians who service, repair, or dispose
of appliances containing high- or very-high-pressure refrigerants, with certain
exceptions such as small appliances and motor vehicle air conditioners.
2. Which refrigerant is classified as a high-pressure refrigerant?
A. R-11
B. R-123
C. R-22
D. R-113
Answer: C. R-22
Rationale: R-22 is a high-pressure refrigerant commonly used in residential and
commercial air-conditioning and refrigeration equipment.
, 3. What is the primary purpose of recovering refrigerant before opening a
refrigeration system?
A. To increase system pressure
B. To improve compressor lubrication
C. To prevent refrigerant from being released into the atmosphere
D. To increase refrigerant temperature
Answer: C. To prevent refrigerant from being released into the atmosphere
Rationale: Section 608 requires technicians to recover refrigerants rather than
intentionally vent them because many refrigerants contribute to ozone
depletion or climate change.
4. Which practice is prohibited under EPA Section 608?
A. Recovering refrigerant
B. Recycling refrigerant
C. Reclaiming refrigerant
D. Intentionally venting refrigerant during service
Answer: D. Intentionally venting refrigerant during service
Rationale: Intentional venting of regulated refrigerants during service,
maintenance, repair, or disposal is prohibited except for specific regulatory
exceptions.
5. What is the purpose of a recovery cylinder?
A. To store oxygen
B. To remove moisture from refrigerant
C. To temporarily contain recovered refrigerant
D. To increase compressor capacity
Answer: C. To temporarily contain recovered refrigerant
Rationale: Recovery cylinders are designed to safely hold refrigerant removed
from appliances during servicing.
, 6. Why should a recovery cylinder never be filled completely with liquid
refrigerant?
A. Refrigerant becomes contaminated
B. The cylinder loses its vacuum
C. Liquid refrigerant expands when heated and can cause dangerous pressure
buildup
D. The recovery machine will stop automatically
Answer: C. Liquid refrigerant expands when heated and can cause dangerous
pressure buildup
Rationale: Liquid refrigerant needs expansion space. Overfilling a cylinder can
create excessive hydrostatic pressure and present a serious safety hazard.
7. What is the maximum recommended filling level commonly used for
refrigerant recovery cylinders?
A. 50%
B. 70%
C. 80%
D. 100%
Answer: C. 80%
Rationale: Recovery cylinders are commonly filled to no more than 80% of their
water capacity by volume to provide sufficient expansion space.
8. Which condition can cause a recovery machine to operate slowly?
A. Warm ambient temperature
B. Noncondensable gases or excessive pressure in the system
C. Clean recovery hoses
D. A properly sized recovery cylinder
Answer: B. Noncondensable gases or excessive pressure in the system
, Rationale: Excessive system pressure can reduce recovery efficiency and increase
recovery time. Noncondensables can also adversely affect system and recovery
equipment performance.
9. What is the purpose of a filter-drier?
A. Increase refrigerant pressure
B. Remove moisture and contaminants from the refrigerant circuit
C. Increase compressor speed
D. Add refrigerant to the system
Answer: B. Remove moisture and contaminants from the refrigerant circuit
Rationale: Filter-driers capture moisture, acids, debris, and other contaminants
that could damage system components.
10.What happens when moisture enters a refrigeration system?
A. Compressor efficiency always increases
B. Refrigerant pressure becomes zero
C. It can react with refrigerant and oil to form acids and cause corrosion
D. The evaporator becomes larger
Answer: C. It can react with refrigerant and oil to form acids and cause corrosion
Rationale: Moisture can contribute to acid formation, corrosion, ice formation,
and compressor damage.
11.What instrument is commonly used to measure vacuum during evacuation?
A. Psychrometer
B. Ammeter
C. Micron gauge
D. Tachometer
Answer: C. Micron gauge
