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Questions and Answers
What is a compound gauge?
What is a compound gauge?
Can only be used for low pressures - Has different unit scales
According to EPA regulations, system flushing with refrigerants is allowed.
According to EPA regulations, system flushing with refrigerants is allowed.
False (B)
What elements does a CFC contain?
What elements does a CFC contain?
Chlorine, fluorine, carbon
What color is a CFC-11 cylinder?
What color is a CFC-11 cylinder?
What color is an HFC-134a cylinder?
What color is an HFC-134a cylinder?
What does a chlorine atom combine with to form?
What does a chlorine atom combine with to form?
What elements does an HCFC contain?
What elements does an HCFC contain?
What elements does an HFC contain?
What elements does an HFC contain?
Alkylbenzene lubricants are associated with?
Alkylbenzene lubricants are associated with?
What must all appliances manufactured or imported into the United States be equipped with?
What must all appliances manufactured or imported into the United States be equipped with?
What color is a recovery cylinder?
What color is a recovery cylinder?
What is the maximum fill level for a refillable cylinder?
What is the maximum fill level for a refillable cylinder?
What is a refrigerant heated above its boiling point called?
What is a refrigerant heated above its boiling point called?
A refrigeration system should not be recovered unless a gauge indicates a minimum pressure of _________ Psig within the system.
A refrigeration system should not be recovered unless a gauge indicates a minimum pressure of _________ Psig within the system.
Any vapor refrigerant vented from the top of a graduated charging cylinder while filling the cylinder with liquid must be recovered.
Any vapor refrigerant vented from the top of a graduated charging cylinder while filling the cylinder with liquid must be recovered.
As of January 1st, 1996, it is legal to import or manufacture CFCs in the United States.
As of January 1st, 1996, it is legal to import or manufacture CFCs in the United States.
Recovery equipment manufactured after November 15, 1993, must be certified to meet EPA standards.
Recovery equipment manufactured after November 15, 1993, must be certified to meet EPA standards.
What indicates that a system may be properly dehydrated?
What indicates that a system may be properly dehydrated?
What may happen to a technician who violates provisions of the CAA?
What may happen to a technician who violates provisions of the CAA?
Refrigerant cylinders should be transported in a ______________ position.
Refrigerant cylinders should be transported in a ______________ position.
An award of __________________ may be paid to a person providing information which leads to a penalty against a technician for violating CAA regulations.
An award of __________________ may be paid to a person providing information which leads to a penalty against a technician for violating CAA regulations.
Before using an empty recovery cylinder, what should you do?
Before using an empty recovery cylinder, what should you do?
Before using a recovery unit, what checks should be performed?
Before using a recovery unit, what checks should be performed?
Why do blended refrigerants leak from a system in uneven amounts?
Why do blended refrigerants leak from a system in uneven amounts?
What does CAA stand for?
What does CAA stand for?
Can ester-based oils be mixed with other oils?
Can ester-based oils be mixed with other oils?
Can mixed refrigerants be reclaimed?
Can mixed refrigerants be reclaimed?
Can state or local laws governing refrigerant be less strict than federal laws?
Can state or local laws governing refrigerant be less strict than federal laws?
Can you use an open flame to warm a refrigerant bottle?
Can you use an open flame to warm a refrigerant bottle?
Why are CFCs considered more harmful to the ozone layer than HCFCs?
Why are CFCs considered more harmful to the ozone layer than HCFCs?
Currently, almost all residential air conditioners use refrigerant ______________.
Currently, almost all residential air conditioners use refrigerant ______________.
For safety, a technician should always wear _____________ and ____________ when working around refrigerants.
For safety, a technician should always wear _____________ and ____________ when working around refrigerants.
What can happen when heating a refrigerant cylinder with a torch?
What can happen when heating a refrigerant cylinder with a torch?
HCFC-123 is toxic.
HCFC-123 is toxic.
HFC-134a is a 'drop-in' replacement for CFC-12.
HFC-134a is a 'drop-in' replacement for CFC-12.
Which family of lubricants do HFC refrigerants usually require?
Which family of lubricants do HFC refrigerants usually require?
What does HFC-134a contain?
What does HFC-134a contain?
How can ice be removed from a sight glass?
How can ice be removed from a sight glass?
How do we know the chlorine in the stratosphere is coming from CFCs?
How do we know the chlorine in the stratosphere is coming from CFCs?
How do you leak check an HFC-134a system with a partial charge?
How do you leak check an HFC-134a system with a partial charge?
How much is the reward for information leading to a conviction for a violation of the CAA?
How much is the reward for information leading to a conviction for a violation of the CAA?
How should systems using a blended refrigerant be charged?
How should systems using a blended refrigerant be charged?
How should you charge a system using 410a refrigerant?
How should you charge a system using 410a refrigerant?
How often must a refillable tank be hydrostatically tested?
How often must a refillable tank be hydrostatically tested?
How will high ambient temperatures affect recovery?
How will high ambient temperatures affect recovery?
If a large leak occurs in a confined area, what is the recommended course of action?
If a large leak occurs in a confined area, what is the recommended course of action?
If EPA regulations change after you become certified, you must comply with any future changes in the law.
If EPA regulations change after you become certified, you must comply with any future changes in the law.
What must recovery equipment manufactured after November 15, 1993, be able to do?
What must recovery equipment manufactured after November 15, 1993, be able to do?
Why is it important not to mix different refrigerants in the same container?
Why is it important not to mix different refrigerants in the same container?
If a refrigeration system fails to hold an applied vacuum, it indicates that the system has a leak.
If a refrigeration system fails to hold an applied vacuum, it indicates that the system has a leak.
If the high pressure gauge's scale reads from 0 to 500, it means they are rated for 500 psig.
If the high pressure gauge's scale reads from 0 to 500, it means they are rated for 500 psig.
Is CFC-12 a 'low' or 'high' pressure refrigerant?
Is CFC-12 a 'low' or 'high' pressure refrigerant?
Is HCFC-123 a 'low' or 'high' pressure refrigerant?
Is HCFC-123 a 'low' or 'high' pressure refrigerant?
Is there a 'drop' in refrigerant for CFC-12?
Is there a 'drop' in refrigerant for CFC-12?
Is ozone depletion a problem for only the U.S.?
Is ozone depletion a problem for only the U.S.?
How are non-condensable and moisture removed from a refrigeration system?
How are non-condensable and moisture removed from a refrigeration system?
What is the chemical symbol for ozone?
What is the chemical symbol for ozone?
What does ODP stand for?
What does ODP stand for?
One chlorine atom may destroy up to ___________ ozone molecules.
One chlorine atom may destroy up to ___________ ozone molecules.
Over-evacuation of refrigeration system does not occur.
Over-evacuation of refrigeration system does not occur.
Why should oxygen or compressed air never be used to pressurize a refrigeration system?
Why should oxygen or compressed air never be used to pressurize a refrigeration system?
What may ozone depletion cause?
What may ozone depletion cause?
Ozone depletion in the upper atmosphere is a global problem.
Ozone depletion in the upper atmosphere is a global problem.
What will ozone depletion cause an increase in?
What will ozone depletion cause an increase in?
At what temperature does R-22 boil?
At what temperature does R-22 boil?
R-410a requires recovery tanks and recovery machines rated for at least what PSIG?
R-410a requires recovery tanks and recovery machines rated for at least what PSIG?
Why can recovery equipment head pressure become excessive?
Why can recovery equipment head pressure become excessive?
What does recycled refrigerant mean?
What does recycled refrigerant mean?
What does reclaimed refrigerant mean?
What does reclaimed refrigerant mean?
What standard must reclaimed refrigerant meet?
What standard must reclaimed refrigerant meet?
What is refrigerant recovery?
What is refrigerant recovery?
What does refrigerant reclaiming require?
What does refrigerant reclaiming require?
Why is refrigerant recovery necessary?
Why is refrigerant recovery necessary?
Under what conditions can non-toxic refrigerants decompose and form dangerous acids and phosgene gas?
Under what conditions can non-toxic refrigerants decompose and form dangerous acids and phosgene gas?
Why does refrigerant tend to migrate to the compressor crankcase?
Why does refrigerant tend to migrate to the compressor crankcase?
What must reclaimed refrigerant be purified and tested to meet?
What must reclaimed refrigerant be purified and tested to meet?
How often must recovery cylinders be hydrostatically tested?
How often must recovery cylinders be hydrostatically tested?
When can recovered refrigerant be resold?
When can recovered refrigerant be resold?
By what date must recovery equipment be certified by an EPA-approved agency?
By what date must recovery equipment be certified by an EPA-approved agency?
What is the minimum psig burst pressure and working pressure required for R-410a manifold gauge and hose sets?
What is the minimum psig burst pressure and working pressure required for R-410a manifold gauge and hose sets?
What does Section 608 of the CAA regulate?
What does Section 608 of the CAA regulate?
Can some state and local governments establish laws concerning recovery that contain stricter regulations than CAA/EPA rules?
Can some state and local governments establish laws concerning recovery that contain stricter regulations than CAA/EPA rules?
What must system-dependent recovery equipment be capable of?
What must system-dependent recovery equipment be capable of?
What is subcooling?
What is subcooling?
What is superheat?
What is superheat?
By what date must technicians be certified to handle refrigerants?
By what date must technicians be certified to handle refrigerants?
What is temperature glide associated with?
What is temperature glide associated with?
How should ternary blend refrigerants be charged into the system?
How should ternary blend refrigerants be charged into the system?
What is the amount of the fine for violating the provisions of the CAA?
What is the amount of the fine for violating the provisions of the CAA?
What is the typical use for the center port of a gauge manifold set?
What is the typical use for the center port of a gauge manifold set?
What color is the low-side gauge of a manifold set?
What color is the low-side gauge of a manifold set?
What are examples of metering devices?
What are examples of metering devices?
What is the calibration range of the high-pressure gauge on a manifold gauge set (non-410a)?
What is the calibration range of the high-pressure gauge on a manifold gauge set (non-410a)?
Where does the latest research indicate the chlorine in the upper atmosphere comes from?
Where does the latest research indicate the chlorine in the upper atmosphere comes from?
What is the leading cause of death from refrigerants?
What is the leading cause of death from refrigerants?
How fast is the level of chlorine detected in the atmosphere increasing compared to fluorine?
How fast is the level of chlorine detected in the atmosphere increasing compared to fluorine?
What is the most hygroscopic family of oils?
What is the most hygroscopic family of oils?
What is the Montreal Protocol?
What is the Montreal Protocol?
What is the most effective method of locating the general area of small leaks?
What is the most effective method of locating the general area of small leaks?
Study Notes
Refrigerant Types and Properties
- CFCs contain chlorine, fluorine, and carbon and are considered more harmful to the ozone layer than HCFCs due to their persistence in the atmosphere.
- HCFCs contain hydrogen, chlorine, fluorine, and carbon, and HCFC-123 is classified as a low-pressure refrigerant.
- HFCs consist of hydrogen, fluorine, and carbon, with HFC-134a being a common refrigerant that contains 0% chlorine.
- CFC-11 cylinders are identifiable by their orange color, while HFC-134a cylinders are sky blue or pale blue.
Regulations and Compliance
- Under EPA regulations, refrigerant system flushing with refrigerants is illegal.
- As of January 1, 1996, it became illegal to import or manufacture CFCs in the U.S.
- All recovery equipment must have low loss fittings and be certified by an EPA-approved agency as of November 15, 1993.
- Technicians must be certified to handle refrigerants by November 14, 1994, and must comply with any future regulatory changes.
Safety and Recovery Procedures
- Recovery cylinders must be gray with a yellow top and transported in a vertical position.
- A refillable cylinder can be filled to a maximum of 80% of its liquid weight.
- Recovery equipment must recover at least 90% of refrigerant from small appliances.
- Evacuate recovery cylinders before use, and check service valves and oil levels for recovery units.
Environmental Impact and Ozone Depletion
- Ozone depletion is a global concern that can cause increased skin cancer, cataracts, and destruction of marine ecosystems.
- One chlorine atom can destroy up to 100,000 ozone molecules.
- Ozone (O3) is critical for blocking harmful UV radiation in the atmosphere.
Refrigerant Handling and Leak Detection
- Blended refrigerants leak unevenly due to different vapor pressures, causing potential problems during recovery.
- When checking for leaks in an HFC-134a system, pressurized nitrogen can be used if a detector is unavailable.
- The recommended method to remove ice from a sight glass is with alcohol spray.
Recovery and Recycling of Refrigerants
- Recycled refrigerant is filtered and dehydrated, while reclaimed refrigerant is processed to meet ARI 700-93 standards.
- Mixed refrigerants should not be reclaimed as the mixture may be unrecoverable.
- Recovery is essential for preventing atmospheric release and maintaining adequate refrigerant supplies.
Miscellanea
- All manufactured appliances must have a service aperture for refrigerant removal.
- A recovery machine's head pressure can become excessive due to closed outlet valves or non-condensables in the cylinder.
- The most effective method for locating small leaks is using electronic detectors.
Additional Important Points
- A maximum fine of $32,500 can be imposed for violating the Clean Air Act (CAA).
- Ester-based oils cannot be mixed with other oils.
- System dependent recovery equipment must be able to recover 90% of the refrigerant from the system.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the EPA 608 core concepts with this flashcard quiz. Covering topics such as compound gauges and CFCs, this guide is essential for understanding refrigerant regulations. Perfect for anyone preparing for certification in HVAC practices.
