EPA 608 Universal (SkillCat) | Actual Exam Questions &
100% Correct Answers | Latest Update 2026 | HVAC
Certification Prep
1. What legislation includes Section 608, which pertains to refrigerants?
Clean Air Act
Montreal Protocol
Resource Conservation and Recovery Act
Safe Drinking Water Act
2. If a technician retrofits a refrigeration system to R134a but mistakenly uses
mineral oil instead of PAG oil, what potential issues could arise?
The refrigerant will work perfectly regardless of the oil used.
The system may experience poor lubrication and increased wear,
leading to potential failure.
The system will operate more efficiently with mineral oil.
There will be no impact on the system's performance.
3. Describe the significance of retrofitting a freezer from R22 to a more
environmentally friendly refrigerant.
Retrofitting is only necessary for commercial freezers, not household
ones.
Retrofitting increases energy consumption and is not recommended.
Retrofitting a freezer from R22 to a more environmentally friendly
refrigerant helps reduce ozone depletion and aligns with EPA
regulations.
Retrofitting does not affect the environmental impact of refrigerants.
,4. What is the definition of dew point in the context of refrigerants?
The pressure at which refrigerants evaporate.
The pressure at which refrigerants become gas.
The temperature at which refrigerants freeze.
The temperature at which refrigerants condense into liquid.
5. How long must an HVAC servicing company keep records for each disposed
appliance with a charge between 5 and 50 pounds?
1 year
3 years
5 years
10 years
6. Consider the phase diagram shown here. A sample of the substance in the
phase diagram is initially at 175 °C & 925 mmHg. What phase transition occurs
when the pressure is decreased to 760 mmHg at constant temperature?
liquid to gas
liquid to solid
, solid to liquid
solid to gas
7. In a scenario where a refrigeration system is not cooling effectively, which
component's malfunction could most directly impact refrigerant pressure and
why?
The compressor, because it is responsible for increasing the
refrigerant's pressure to facilitate heat exchange.
The evaporator, because it absorbs heat from the environment.
The expansion valve, as it regulates the flow of refrigerant into the
evaporator.
The condenser, since it removes heat from the refrigerant.
8. What must be done with used refrigerants before they can be sent for
reclamation?
They must be mixed with new refrigerants.
They must be properly recovered and handled.
They can be disposed of in regular waste.
They can be released into the atmosphere.
9. After refrigerant is phased-out, supplies of that refrigerant for equipment
servicing can only come from
Recovered and reclaimed refrigerant
exemptions granted under the Montreal Protocol
Third-World Countries
Chinese and Indian manufacturers under a special permit
, 10. Describe the role of Section 608 of the Clean Air Act in relation to
refrigerants.
Section 608 of the Clean Air Act is concerned with the certification of
HVAC technicians.
Section 608 of the Clean Air Act establishes regulations for the
handling and recovery of refrigerants to protect the environment.
Section 608 of the Clean Air Act mandates the use of natural
refrigerants only.
Section 608 of the Clean Air Act focuses on the promotion of energy
efficiency in appliances.
11. According to EPA regulations, who is authorized to purchase R-22
refrigerant?
Homeowners
Retailers without certification
Any individual
Certified technicians
12. If a technician is working with a refrigerant that is excluded from Section 608
requirements, what responsibilities might they still have regarding
environmental protection?
They are not required to track the amount of refrigerant used.
They must still ensure proper handling and recovery to prevent
environmental harm.
They can use the refrigerant in any manner without concern for
safety.
They can dispose of the refrigerant without any regulations.
100% Correct Answers | Latest Update 2026 | HVAC
Certification Prep
1. What legislation includes Section 608, which pertains to refrigerants?
Clean Air Act
Montreal Protocol
Resource Conservation and Recovery Act
Safe Drinking Water Act
2. If a technician retrofits a refrigeration system to R134a but mistakenly uses
mineral oil instead of PAG oil, what potential issues could arise?
The refrigerant will work perfectly regardless of the oil used.
The system may experience poor lubrication and increased wear,
leading to potential failure.
The system will operate more efficiently with mineral oil.
There will be no impact on the system's performance.
3. Describe the significance of retrofitting a freezer from R22 to a more
environmentally friendly refrigerant.
Retrofitting is only necessary for commercial freezers, not household
ones.
Retrofitting increases energy consumption and is not recommended.
Retrofitting a freezer from R22 to a more environmentally friendly
refrigerant helps reduce ozone depletion and aligns with EPA
regulations.
Retrofitting does not affect the environmental impact of refrigerants.
,4. What is the definition of dew point in the context of refrigerants?
The pressure at which refrigerants evaporate.
The pressure at which refrigerants become gas.
The temperature at which refrigerants freeze.
The temperature at which refrigerants condense into liquid.
5. How long must an HVAC servicing company keep records for each disposed
appliance with a charge between 5 and 50 pounds?
1 year
3 years
5 years
10 years
6. Consider the phase diagram shown here. A sample of the substance in the
phase diagram is initially at 175 °C & 925 mmHg. What phase transition occurs
when the pressure is decreased to 760 mmHg at constant temperature?
liquid to gas
liquid to solid
, solid to liquid
solid to gas
7. In a scenario where a refrigeration system is not cooling effectively, which
component's malfunction could most directly impact refrigerant pressure and
why?
The compressor, because it is responsible for increasing the
refrigerant's pressure to facilitate heat exchange.
The evaporator, because it absorbs heat from the environment.
The expansion valve, as it regulates the flow of refrigerant into the
evaporator.
The condenser, since it removes heat from the refrigerant.
8. What must be done with used refrigerants before they can be sent for
reclamation?
They must be mixed with new refrigerants.
They must be properly recovered and handled.
They can be disposed of in regular waste.
They can be released into the atmosphere.
9. After refrigerant is phased-out, supplies of that refrigerant for equipment
servicing can only come from
Recovered and reclaimed refrigerant
exemptions granted under the Montreal Protocol
Third-World Countries
Chinese and Indian manufacturers under a special permit
, 10. Describe the role of Section 608 of the Clean Air Act in relation to
refrigerants.
Section 608 of the Clean Air Act is concerned with the certification of
HVAC technicians.
Section 608 of the Clean Air Act establishes regulations for the
handling and recovery of refrigerants to protect the environment.
Section 608 of the Clean Air Act mandates the use of natural
refrigerants only.
Section 608 of the Clean Air Act focuses on the promotion of energy
efficiency in appliances.
11. According to EPA regulations, who is authorized to purchase R-22
refrigerant?
Homeowners
Retailers without certification
Any individual
Certified technicians
12. If a technician is working with a refrigerant that is excluded from Section 608
requirements, what responsibilities might they still have regarding
environmental protection?
They are not required to track the amount of refrigerant used.
They must still ensure proper handling and recovery to prevent
environmental harm.
They can use the refrigerant in any manner without concern for
safety.
They can dispose of the refrigerant without any regulations.
