Mixed Deck — All EPA Topics Flashcards
100 cards from real EPA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 20 Mixed Deck — All EPA Topics flashcards as text
Which type of refrigerant release is NOT considered a violation of the venting prohibition?
Answer: De minimis releases that occur during good-faith recovery attempts
Small de minimis releases during proper recovery, recycling, or connecting/disconnecting hoses are permitted.
Why should refrigerant cylinders never be heated with an open flame or stored above 125°F?
Answer: Pressure can rise enough to rupture the cylinder
Heat raises cylinder pressure rapidly and can cause a rupture or explosion.
What documentation must technicians provide when disposing of appliances containing refrigerants?
Answer: Proof of refrigerant recovery
Under EPA Section 608 regulations, technicians and appliance disposers must maintain records demonstrating that refrigerants have been properly recovered from appliances before disposal. This documentation serves as proof of compliance with environmental laws designed to prevent the release of ozone-depleting substances and greenhouse gases into the atmosphere.
What is required when disposing of appliances containing refrigerants?
Answer: Certification of refrigerant recovery
When disposing of appliances containing refrigerants, EPA regulations mandate that the refrigerant must first be recovered by a certified technician. A certification of refrigerant recovery must then be provided to the disposal facility. This ensures that harmful refrigerants are not released into the atmosphere, thereby protecting the ozone layer and mitigating climate change.
A recovery cylinder at 75°F reads a pressure noticeably higher than the P-T chart value for the refrigerant it contains. What is the most likely cause?
Answer: Noncondensable gases are present
Noncondensables such as air add their partial pressure, raising cylinder pressure above the refrigerant's saturation pressure.
Which refrigerants are exempt from the Section 608 venting ban because EPA has decided releasing them poses no threat to the environment?
Answer: Certain substitutes such as ammonia in commercial or industrial process refrigeration, and some hydrocarbons in approved small uses
EPA has exempted certain substitutes, such as ammonia in commercial or industrial process refrigeration and approved hydrocarbon uses, from the venting ban, but HCFCs, CFCs, and HFC blends are not exempt.
Which of these can EPA charge as a Section 608 violation?
Answer: Knowingly venting refrigerant, plus each day the violation continues
Venting is prohibited, and EPA can impose a separate civil penalty for each day a violation continues.
What documentation must technicians provide when disposing of appliances containing refrigerants?
Answer: Proof of refrigerant recovery
When disposing of appliances containing refrigerants, EPA regulations require technicians and disposal facilities to provide proof of proper refrigerant recovery. This documentation ensures compliance with Section 608 of the Clean Air Act, which aims to prevent the release of harmful refrigerants into the atmosphere. It verifies that these substances have been safely removed and managed according to environmental standards.
Water from the chiller tubes is not circulated or drained while refrigerant is being recovered from a water-cooled chiller. What can happen?
Answer: The water in the tubes can freeze and rupture them
Refrigerant pressure and temperature drop during recovery, so still water in the tubes can freeze and crack them.
What colors identify an approved refrigerant recovery cylinder?
Answer: Gray body with a yellow top
Recovery cylinders have a gray body and a yellow shoulder or top.
What does it mean when a recovery machine 'cycles off on low pressure' during the recovery process?
Answer: The refrigerant recovery is substantially complete for that section of the system
When a recovery machine cycles off on low pressure, it indicates that the refrigerant vapor pressure has dropped low enough that most accessible refrigerant has been removed.
What quality assurance measure supports safety and compliance?
Answer: Regular self-assessment, peer review, and adherence to established standards
Ongoing quality assurance through self-assessment, peer review, and standards adherence ensures continuous improvement.
Before used refrigerant can be sold to a new owner, it must be:
Answer: Reclaimed to AHRI Standard 700 purity
Refrigerant changing ownership must be reclaimed by an EPA-certified reclaimer to AHRI 700 specs.
What quality assurance measure supports assessment and evaluation?
Answer: Regular self-assessment, peer review, and adherence to established standards
Ongoing quality assurance through self-assessment, peer review, and standards adherence ensures continuous improvement.
What is the primary danger of a large refrigerant leak in an enclosed space?
Answer: Oxygen displacement causing asphyxiation
Refrigerant vapor is heavier than air and can displace oxygen, causing suffocation.
How should challenges in safety and compliance be addressed?
Answer: Apply systematic problem-solving, seek expert guidance when needed, and document decisions
Systematic problem-solving combined with appropriate consultation and documentation ensures challenges are addressed effectively.
Which class of refrigerants is currently being promoted as long-term low-GWP replacements for HFCs?
Answer: HFOs
HFOs (hydrofluoroolefins) are being developed as next-generation refrigerants with very low GWP values (often below 10) and zero ODP.
What does 'ODP' stand for in refrigerant classification?
Answer: Ozone Depletion Potential
ODP (Ozone Depletion Potential) measures how much a refrigerant can destroy stratospheric ozone relative to R-11, which has an ODP of 1.0.
What ethical standard governs communication and documentation practice?
Answer: Adherence to the profession's code of ethics and applicable laws and regulations
Professional ethics codes and applicable laws provide the framework for ethical practice in every professional field.
What personal protective equipment is required at minimum when handling refrigerant cylinders and connecting hoses?
Answer: Safety glasses and protective gloves
Safety glasses and gloves protect the eyes and skin from liquid refrigerant, which can cause frostbite on contact.