LOUISIANA CLASS D
"CHAUFFEUR'S"
LICENSE TEST CERTIFICATION SCRIPT
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ A2L Refrigerant.
Answer: Mildly flammable, lower GWP refrigerant, e.g., R32
◍ The minumum concentration of a refrigerant that can propagate a flame
through a consistent mixture of the refrigerant and air is known as the:.
Answer: Lower Flammability Limit (LFL)
◍ the first stage of the evacuation process, which removes non-condensables
from a system is called:.
Answer: Recovery
◍ once a flammable refrigerant has been recovered and stored in a cylinder:.
Answer: it must be placed a safe distance away from the work area before a
system repair or installation is started.
◍ ASHRAE 34 Classification A1.
Answer: Toxicity: non-toxic, Flammability: non-flammable or low flame
propagation
◍ which of the following refrigerants is exempt from the EPS's recovery
mandate?.
Answer: R-32 (R-290) R-454B R-1234yf
◍ which of the following refrigerants is classified as an A3 refrigerant?.
Answer: R-32 (R-290) R-717 R-1234yf
, ◍ HFO Molecule.
Answer: Hydrofluoro olefin with low GWP and double bonded carbons
◍ Atmospheric pressure is equal to approximately:.
Answer: 760,000 microns
◍ An uppercase letter designation is used when refrigerant blends are:.
Answer: composed of the same refrigerants, but with different percentages
of each.
◍ Flammable refrigerant cylinders must have:.
Answer: red band at the top of the container.
◍ which of the following refrigerants has the lowest global warming potenial?.
Answer: R-32 (R-290) R-404A R-454B
◍ which of the following should be done prior to beginning the recovery
process?.
Answer: purge air from the refrigerant hoses to prevent refrigerant
contamination.
◍ when working with A2L refrigerants, which one of the following is not an
approved leak detection method?.
Answer: halide leak detector
◍ when brazing a system that has bene charged wirh an A2L refrigerant:.
Answer: the system should be swept with nitrogen to ensure that there is no
residual refrigerant.
◍ refrigerants that have a lowercase destination, such as R-134a, indicates
a(n):.
Answer: isomer
◍ which of the following is classified as an A2L refrigerant?.
Answer: R-290 R-441A R-744 (R-1234yf)
◍ when using a flammable refrigerant as a trace gas for leak detection, the
amount must not exceed:.
"CHAUFFEUR'S"
LICENSE TEST CERTIFICATION SCRIPT
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ A2L Refrigerant.
Answer: Mildly flammable, lower GWP refrigerant, e.g., R32
◍ The minumum concentration of a refrigerant that can propagate a flame
through a consistent mixture of the refrigerant and air is known as the:.
Answer: Lower Flammability Limit (LFL)
◍ the first stage of the evacuation process, which removes non-condensables
from a system is called:.
Answer: Recovery
◍ once a flammable refrigerant has been recovered and stored in a cylinder:.
Answer: it must be placed a safe distance away from the work area before a
system repair or installation is started.
◍ ASHRAE 34 Classification A1.
Answer: Toxicity: non-toxic, Flammability: non-flammable or low flame
propagation
◍ which of the following refrigerants is exempt from the EPS's recovery
mandate?.
Answer: R-32 (R-290) R-454B R-1234yf
◍ which of the following refrigerants is classified as an A3 refrigerant?.
Answer: R-32 (R-290) R-717 R-1234yf
, ◍ HFO Molecule.
Answer: Hydrofluoro olefin with low GWP and double bonded carbons
◍ Atmospheric pressure is equal to approximately:.
Answer: 760,000 microns
◍ An uppercase letter designation is used when refrigerant blends are:.
Answer: composed of the same refrigerants, but with different percentages
of each.
◍ Flammable refrigerant cylinders must have:.
Answer: red band at the top of the container.
◍ which of the following refrigerants has the lowest global warming potenial?.
Answer: R-32 (R-290) R-404A R-454B
◍ which of the following should be done prior to beginning the recovery
process?.
Answer: purge air from the refrigerant hoses to prevent refrigerant
contamination.
◍ when working with A2L refrigerants, which one of the following is not an
approved leak detection method?.
Answer: halide leak detector
◍ when brazing a system that has bene charged wirh an A2L refrigerant:.
Answer: the system should be swept with nitrogen to ensure that there is no
residual refrigerant.
◍ refrigerants that have a lowercase destination, such as R-134a, indicates
a(n):.
Answer: isomer
◍ which of the following is classified as an A2L refrigerant?.
Answer: R-290 R-441A R-744 (R-1234yf)
◍ when using a flammable refrigerant as a trace gas for leak detection, the
amount must not exceed:.
