QUIZ FROM A2L EXAM QUESTIONS WITH ACCURATE
ANSWERS
____ is a near-azeotropic, refrigerant blend that has a GWP of 466. It is an
HFC/HFO blend madeup HFC-32 and HFO-1234yf. It is charged as a liquid to avoid
fractionation and has a very lowtemperature glide (about 2.5°F). correct answer
R-454B
_____ is a single-compound, HFC refrigerant that has a GWP of 675. It can be
charged as a liquid or avapor 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 airconditioning systems but is also used as a component in many
other HFC/HFO blends. correct answer R-1234yf
__________ 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
__________ is a measurement of the amount of heat released when a substance,
in this case, a refrigerant, burns. correct answer Heat of combustion (HOC)
A complex process that cleans, filters, and tests a refrigerant to meet the "like-
new" purity level specified in AHRI Standard 700 is; correct answer reclamation
A metric that is used to measure a refrigerant's environmental impact as a
greenhouse gas is; correct answer Global Warming Potential (GWP).
, A refrigerant blend behaves like a single compound refrigerant is called a(n);
correct answer azeotropic blend
A refrigerant oil that is hygroscopic will; correct answer absorb moisture.
A2L refrigerants have a flammability potential that is higher than; correct answer
A1 refrigerants.
A2L systems are designed with electrical components that are intrinsically safe
(IS). true / false correct answer treu
Accumulation of a flammable refrigerant in a confined space can lead to a severe
ignition event or asphyxiation.
true / false correct answer true
After recovery of an A2L refrigerant, the system should be purged with dry
nitrogen (nitrogensweep). correct answer dry Nitrogen
Currently, the charge limit for systems containing an A3 refrigerant is 400 grams
or 14.11 ounces.
true/ false correct answer false
DOT regulations require refrigerant cylinders containing over 2.2 lbs. of a A2L
refrigerant to be equipped with a pressure relief valve instead of a rupture disc.
correct answer Pressure Relief Valve
ANSWERS
____ is a near-azeotropic, refrigerant blend that has a GWP of 466. It is an
HFC/HFO blend madeup HFC-32 and HFO-1234yf. It is charged as a liquid to avoid
fractionation and has a very lowtemperature glide (about 2.5°F). correct answer
R-454B
_____ is a single-compound, HFC refrigerant that has a GWP of 675. It can be
charged as a liquid or avapor 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 airconditioning systems but is also used as a component in many
other HFC/HFO blends. correct answer R-1234yf
__________ 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
__________ is a measurement of the amount of heat released when a substance,
in this case, a refrigerant, burns. correct answer Heat of combustion (HOC)
A complex process that cleans, filters, and tests a refrigerant to meet the "like-
new" purity level specified in AHRI Standard 700 is; correct answer reclamation
A metric that is used to measure a refrigerant's environmental impact as a
greenhouse gas is; correct answer Global Warming Potential (GWP).
, A refrigerant blend behaves like a single compound refrigerant is called a(n);
correct answer azeotropic blend
A refrigerant oil that is hygroscopic will; correct answer absorb moisture.
A2L refrigerants have a flammability potential that is higher than; correct answer
A1 refrigerants.
A2L systems are designed with electrical components that are intrinsically safe
(IS). true / false correct answer treu
Accumulation of a flammable refrigerant in a confined space can lead to a severe
ignition event or asphyxiation.
true / false correct answer true
After recovery of an A2L refrigerant, the system should be purged with dry
nitrogen (nitrogensweep). correct answer dry Nitrogen
Currently, the charge limit for systems containing an A3 refrigerant is 400 grams
or 14.11 ounces.
true/ false correct answer false
DOT regulations require refrigerant cylinders containing over 2.2 lbs. of a A2L
refrigerant to be equipped with a pressure relief valve instead of a rupture disc.
correct answer Pressure Relief Valve
