Podcast
Questions and Answers
Why are HFO refrigerants less flammable than hydrocarbon refrigerants?
Why are HFO refrigerants less flammable than hydrocarbon refrigerants?
They contain fluorine
What should a technician do if they lose their Section 608 certification card?
What should a technician do if they lose their Section 608 certification card?
Request a replacement from their certifying organization
How do the global warming potential of isobutane (R-600a) and R-441A compare to the GWP's of HFC-134a, R-404A, and R-410A?
How do the global warming potential of isobutane (R-600a) and R-441A compare to the GWP's of HFC-134a, R-404A, and R-410A?
They are significantly higher
Which refrigerant depletes the ozone layer?
Which refrigerant depletes the ozone layer?
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Which element of CFC or HCFC molecule causes ozone depletion?
Which element of CFC or HCFC molecule causes ozone depletion?
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What is unique about an azeotropic refrigerant mixture?
What is unique about an azeotropic refrigerant mixture?
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In the event of a large release of CFC, HCFC, or HFC refrigerant in a contained area which of the following is true?
In the event of a large release of CFC, HCFC, or HFC refrigerant in a contained area which of the following is true?
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Which of the following is not a violation of the refrigerant management regulations under the Clean Air Act?
Which of the following is not a violation of the refrigerant management regulations under the Clean Air Act?
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How does the global warming potential of R-410A compare to carbon dioxide?
How does the global warming potential of R-410A compare to carbon dioxide?
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Under EPA's regulations, what standard must reclaimed refrigerant meet before it can be resold?
Under EPA's regulations, what standard must reclaimed refrigerant meet before it can be resold?
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Chlorofluorocarbons (CFC), hydrochlorofluorocarbons (HCFCs), and hydrofluorocarbons (HFCs) have which of the following in common?
Chlorofluorocarbons (CFC), hydrochlorofluorocarbons (HCFCs), and hydrofluorocarbons (HFCs) have which of the following in common?
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Which word applies to the process that returns refrigerant to new product specifications and that requires chemical analysis?
Which word applies to the process that returns refrigerant to new product specifications and that requires chemical analysis?
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A disposable cylinder should be reduced to what pressure before scrapping?
A disposable cylinder should be reduced to what pressure before scrapping?
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What evidence demonstrates that chlorine in the stratosphere is primarily from man-made chemicals rather than from natural sources such as volcanoes?
What evidence demonstrates that chlorine in the stratosphere is primarily from man-made chemicals rather than from natural sources such as volcanoes?
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A refrigerant label to identify the type of refrigerant recovered is placed on recovery cylinder for all of the following reasons, EXCEPT to:
A refrigerant label to identify the type of refrigerant recovered is placed on recovery cylinder for all of the following reasons, EXCEPT to:
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What effect will low ambient temperatures have on recovery?
What effect will low ambient temperatures have on recovery?
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Which type of refrigerant is the most harmful to stratospheric ozone?
Which type of refrigerant is the most harmful to stratospheric ozone?
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What is the Montreal Protocol?
What is the Montreal Protocol?
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Under the Section 608 'safe disposal requirements', who is responsible for ensuring that CFC, HCFC, and HFC refrigerant has been removed from household refrigerators before they are disposed of?
Under the Section 608 'safe disposal requirements', who is responsible for ensuring that CFC, HCFC, and HFC refrigerant has been removed from household refrigerators before they are disposed of?
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Which of the following refrigerants is an HFO?
Which of the following refrigerants is an HFO?
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Which of the following factors affect the speed of system dehydration?
Which of the following factors affect the speed of system dehydration?
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In what state does the refrigerant leave the condenser?
In what state does the refrigerant leave the condenser?
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What are the characteristics of hydrofluoroolefins (HFOs)?
What are the characteristics of hydrofluoroolefins (HFOs)?
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How do refrigerant blends leak from a system?
How do refrigerant blends leak from a system?
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You have to leak-check a unit which has lost a complete charge. Which gas(es) would cause the LEAST damage to the environment?
You have to leak-check a unit which has lost a complete charge. Which gas(es) would cause the LEAST damage to the environment?
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Study Notes
Refrigerants and Environmental Impact
- HFO refrigerants contain fluorine, making them less flammable compared to hydrocarbons.
- R-22 is a refrigerant known for ozone layer depletion, primarily due to the chlorine it contains.
- Chlorine is the element in CFC and HCFC molecules responsible for ozone depletion.
- HFCs, such as R-410A, have a global warming potential (GWP) that is over a thousand times higher than carbon dioxide.
Certification and Compliance
- Technicians should request a replacement certification card from their certifying organization if it is lost.
- Under EPA regulations, reclaimed refrigerant must meet the AHRI 700 standard before resale.
Refrigerant Management
- CFCs, HCFCs, and HFCs must be recovered before opening or disposing of appliances to comply with regulations.
- Regular servicing of systems utilizing CFCs or HCFCs after their phaseout date is not considered a violation.
- It’s crucial that companies determine the amount of recovered refrigerant for record-keeping purposes.
Refrigerant Properties and Actions
- Azeotropic refrigerant mixtures behave as a single refrigerant during evaporation and condensation processes.
- Low ambient temperatures can increase recovery time during refrigerant removal.
- Refrigerants leak from a system at uneven rates due to differing vapor pressures.
- HFOs are characterized as non-ozone depleting and possessing low global warming potentials.
Disposal and Safety
- The final person in the disposal chain is responsible for ensuring refrigerants are removed from refrigerators prior to disposal.
- In the event of a large release of refrigerants, a self-contained breathing apparatus (SCBA) is required or leaving the area is recommended.
Additional Knowledge
- Dry nitrogen is the preferable gas to use for leak checking a unit that has lost its complete charge, as it is less harmful to the environment.
- A disposable cylinder should be reduced to 0 psig before scrapping to comply with safety standards.
- R-1234yf is an example of an HFO refrigerant currently used in modern applications.
- The Montreal Protocol is an international treaty aimed at addressing ozone-depleting substances and promoting their alternatives.
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Description
This quiz focuses on the various types of refrigerants and their environmental implications, including the concepts of ozone layer depletion and global warming potential. It also addresses certification and compliance requirements for technicians in managing refrigerants. Test your knowledge on the critical regulations and management practices in the HVAC field.
