A2L QUESTIONS WITH ACCURATE ANSWERS
___________ are designed and installed to prevent accumulation and/or ignition
of flammable refrigerant vapors should a leak occur. correct answer mitigation
strategies
___________ can activate mechanical ventilation systems, activate a solenoid to
force the system into a pump down, de-energize the system completely, or a
combination of mitigation responses using control logic electronics. correct
answer active refrigerant sensors
___________ can form when any fluorine-containing refrigerant undergoes
complete or incomplete combustion, or thermal decomposition correct answer
Hydrogen Fluoride
___________ components such as the contactor or capacitor are designed to be
enclosed, isolating the electrical contacts from the atmosphere. correct answer
Intrinsically safe electrical
___________ contain hydrogen, flourine, and carbon and do not deplete the
ozone as they have no chlorine, and most have a high GWP. correct answer
Hydrofluorocarbons (HFCs)
___________ is a measurement of the amount of heat released when a
substance, in this case, a refrigerant, burns correct answer Heat of Combustion
(HOC)
___________ is a near-azeotropic, refrigerant blend that has a GWP of 466. it is
an HFC/HFO blend made up HFC-32 and HFO-1234yf. It is charged as a liquid to
, avoid fractionation and has a very low temperature glide (about 2.5) correct
answer R-454B
___________ is a single-compound, HFC refrigerant that has a GWP of 675. It can
be charged as a liquid or a vapor and does not fractionate or have a temperature
glide. correct answer R-32
___________ is an HFO refrigerant with a GWP of less than 1. it is primarily used
in automotive air conditioning systems but is also used as a component in many
other HFC/HFO blends. correct answer R-1234yf
___________ is term used to describe the range of boiling (or condensing)
temperatures for a refrigerant at a given pressure. correct answer temperature
glide
___________ is used as a baseline measurement for global warming potential and
has a value of 1. correct answer CO2
___________ occurs when one or more of the refrigerants in a blend leaks at a
faster rate than other refrigerants in the blend. correct answer fractionation
___________ oil is a synthetic oil suitable for most refrigeration systems using
HFC and HFO refrigerants, is very hygroscopic, and should not be exposed to the
atmosphere. correct answer Polyol Ester
___________ refrigerants contain hydrogen and carbon and are classified by
ASHRAE in the A3 safety group, which are high flammable, and are often referred
to as natural referants. correct answer Hydrocarbons (HCs)
___________ are designed and installed to prevent accumulation and/or ignition
of flammable refrigerant vapors should a leak occur. correct answer mitigation
strategies
___________ can activate mechanical ventilation systems, activate a solenoid to
force the system into a pump down, de-energize the system completely, or a
combination of mitigation responses using control logic electronics. correct
answer active refrigerant sensors
___________ can form when any fluorine-containing refrigerant undergoes
complete or incomplete combustion, or thermal decomposition correct answer
Hydrogen Fluoride
___________ components such as the contactor or capacitor are designed to be
enclosed, isolating the electrical contacts from the atmosphere. correct answer
Intrinsically safe electrical
___________ contain hydrogen, flourine, and carbon and do not deplete the
ozone as they have no chlorine, and most have a high GWP. correct answer
Hydrofluorocarbons (HFCs)
___________ is a measurement of the amount of heat released when a
substance, in this case, a refrigerant, burns correct answer Heat of Combustion
(HOC)
___________ is a near-azeotropic, refrigerant blend that has a GWP of 466. it is
an HFC/HFO blend made up HFC-32 and HFO-1234yf. It is charged as a liquid to
, avoid fractionation and has a very low temperature glide (about 2.5) correct
answer R-454B
___________ is a single-compound, HFC refrigerant that has a GWP of 675. It can
be charged as a liquid or a vapor and does not fractionate or have a temperature
glide. correct answer R-32
___________ is an HFO refrigerant with a GWP of less than 1. it is primarily used
in automotive air conditioning systems but is also used as a component in many
other HFC/HFO blends. correct answer R-1234yf
___________ is term used to describe the range of boiling (or condensing)
temperatures for a refrigerant at a given pressure. correct answer temperature
glide
___________ is used as a baseline measurement for global warming potential and
has a value of 1. correct answer CO2
___________ occurs when one or more of the refrigerants in a blend leaks at a
faster rate than other refrigerants in the blend. correct answer fractionation
___________ oil is a synthetic oil suitable for most refrigeration systems using
HFC and HFO refrigerants, is very hygroscopic, and should not be exposed to the
atmosphere. correct answer Polyol Ester
___________ refrigerants contain hydrogen and carbon and are classified by
ASHRAE in the A3 safety group, which are high flammable, and are often referred
to as natural referants. correct answer Hydrocarbons (HCs)
