Low GWP Refrigerant Safety: Flammable and Mildly
Flammable Refrigerants in HVACR Exam Questions
And Correct Answers
What does the term 'flammable refrigerant' include?
It includes ASHRAE refrigerant flammability designations of 2, 2L, and 3.
What should technicians discuss with their insurance carrier?
Liability issues related to working with flammable refrigerants.
What are the key components for safety in the HVACR industry?
Education, training, and certification.
What is the significance of the 'note' mentioned in the guide?
It indicates that a flammable refrigerant may have additional safety, service, or
installation requirements.
Which organization provided information for this guide?
Various industry organizations, manufacturers, contractors, authors, and educators.
,What is the role of the US Environmental Protection Agency (EPA) in refrigerant
standards?
They enforce the Clean Air Act Amendments, particularly Sections 608 and 612.
What does ASHRAE Standard 15 cover?
It covers safety standards for refrigerants.
What is the purpose of ANSI/ASHRAE Standard 34?
It establishes safety classifications for refrigerants.
What is the minimum ignition energy (MIE)?
The minimum energy required to ignite a flammable refrigerant.
What does the refrigerant concentration limit (RCL) refer to?
The maximum concentration of refrigerant that can be present in the air before it
becomes flammable.
What is the lower flammability limit (LFL)?
The lowest concentration of a gas or vapor in air that can ignite.
,What is the significance of proper gloves and safety goggles when handling
refrigerants?
They protect against serious burns or blindness caused by refrigerants.
What should be done in the event of a large refrigerant leak?
The area should be vacated and ventilated down to a safe level before re-entry.
What are the potential hazards of refrigerants?
They can displace oxygen, leading to suffocation or asphyxiation, and some can be
toxic.
What is the purpose of pressure testing requirements?
To ensure the integrity and safety of refrigerant systems.
What is involved in refrigerant recovery?
The process of safely removing refrigerant from a system for recycling or disposal.
What are the ANSI/ASHRAE Standard 15.2 requirements?
They provide additional safety requirements for the use of flammable refrigerants.
, What does UL Standard 60335-2-40 cover?
It addresses safety requirements for refrigeration appliances.
What is the role of the Air Conditioning Heating and Refrigeration Institute
(AHRI)?
They provide guidelines and standards for HVACR equipment.
What is the importance of local codes and manufacturer's literature?
They may differ from general guidelines and should be followed for compliance.
What is the significance of the SDS for refrigerants?
The Safety Data Sheet (SDS) provides essential safety information about handling
refrigerants.
What does the term 'Burning Velocity' refer to?
The speed at which a flame propagates through a combustible gas mixture.
What is the Heat of Combustion (HOC)?
The amount of energy released when a substance combusts.
Flammable Refrigerants in HVACR Exam Questions
And Correct Answers
What does the term 'flammable refrigerant' include?
It includes ASHRAE refrigerant flammability designations of 2, 2L, and 3.
What should technicians discuss with their insurance carrier?
Liability issues related to working with flammable refrigerants.
What are the key components for safety in the HVACR industry?
Education, training, and certification.
What is the significance of the 'note' mentioned in the guide?
It indicates that a flammable refrigerant may have additional safety, service, or
installation requirements.
Which organization provided information for this guide?
Various industry organizations, manufacturers, contractors, authors, and educators.
,What is the role of the US Environmental Protection Agency (EPA) in refrigerant
standards?
They enforce the Clean Air Act Amendments, particularly Sections 608 and 612.
What does ASHRAE Standard 15 cover?
It covers safety standards for refrigerants.
What is the purpose of ANSI/ASHRAE Standard 34?
It establishes safety classifications for refrigerants.
What is the minimum ignition energy (MIE)?
The minimum energy required to ignite a flammable refrigerant.
What does the refrigerant concentration limit (RCL) refer to?
The maximum concentration of refrigerant that can be present in the air before it
becomes flammable.
What is the lower flammability limit (LFL)?
The lowest concentration of a gas or vapor in air that can ignite.
,What is the significance of proper gloves and safety goggles when handling
refrigerants?
They protect against serious burns or blindness caused by refrigerants.
What should be done in the event of a large refrigerant leak?
The area should be vacated and ventilated down to a safe level before re-entry.
What are the potential hazards of refrigerants?
They can displace oxygen, leading to suffocation or asphyxiation, and some can be
toxic.
What is the purpose of pressure testing requirements?
To ensure the integrity and safety of refrigerant systems.
What is involved in refrigerant recovery?
The process of safely removing refrigerant from a system for recycling or disposal.
What are the ANSI/ASHRAE Standard 15.2 requirements?
They provide additional safety requirements for the use of flammable refrigerants.
, What does UL Standard 60335-2-40 cover?
It addresses safety requirements for refrigeration appliances.
What is the role of the Air Conditioning Heating and Refrigeration Institute
(AHRI)?
They provide guidelines and standards for HVACR equipment.
What is the importance of local codes and manufacturer's literature?
They may differ from general guidelines and should be followed for compliance.
What is the significance of the SDS for refrigerants?
The Safety Data Sheet (SDS) provides essential safety information about handling
refrigerants.
What does the term 'Burning Velocity' refer to?
The speed at which a flame propagates through a combustible gas mixture.
What is the Heat of Combustion (HOC)?
The amount of energy released when a substance combusts.
