LOUISIANA CLASS D
"CHAUFFEUR'S"
LICENSE TEST ACTUAL EXAM PAPER
2026 QUESTIONS WITH ANSWERS
GRADED A+
◍ Some of the variables that affect the allowable system charge of an A2L
system are:.
Answer: · system design and capacity (in Btu/h),· length and size of the
refrigerant piping,· the indoor volume (ft3) of the installation area,· the
occupancy classification of the structure.
◍ What are the A2L refrigerants and what's important to know about them?.
Answer: Refrigerants such as R-32 and R-454B that are low in toxicity and
mildly flammable.
◍ R-32.
Answer: A refrigerant with a GWP (Global Warming Potential) of 675, used
as a replacement for R-410A.
◍ R-454B.
Answer: A refrigerant with a GWP of 466, serving as an alternative to
R-410A.
◍ 20. When charging a new A2L system,
_______________________________________________ must be recorded
on a label affixed to the unit by the installing technician..
Answer: the total charge weight (and date of charge)
◍ AIM Act.
, Answer: Federal law phasing down high-GWP refrigerants.
◍ For A2L-charged systems, the maximum allowable charge is not
______________________________..
Answer: a universal figure
◍ GWP.
Answer: Global Warming Potential, a measure of how much heat a
greenhouse gas traps in the atmosphere.
◍ Common Question: Why the change?.
Answer: New rules require lower-emission refrigerants — these are better
for the planet and future-proof your home.
◍ Common Question: Is the new refrigerant it safe?.
Answer: Yes — they're low toxicity and only mildly flammable in lab
conditions. Systems include built-in safety features.
◍ Common Question: Will I save money?.
Answer: Yes — most new systems use less refrigerant and more efficient
parts like inverter compressors.
◍ ________________________________ components such as the contactor
or capacitor are designed to be enclosed, isolating the electrical contacts
from the atmosphere..
Answer: Intrinsically safe
◍ Common Question: Can I keep my current unit?.
Answer: Unfortunately not — these refrigerants require new equipment
designed for their chemistry and safety.
◍ Common Question: Will it leak?.
Answer: Not more than before — and with a smaller charge size, leaks are
less impactful.
◍ ___________ 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..
, Answer: R-1234yf
◍ Environmental impact of R-410A.
Answer: GWP of R-410A is 2088, indicating its high potential for global
warming.
◍ __________ 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°F)..
Answer: R-454B
◍ EPA 608.
Answer: Certification still required for R-32 and R-454B
◍ Fractionation.
Answer: Unbalanced refrigerant from vapor charging a blend
◍ IS Tools.
Answer: Intrinsically Safe — avoid sparks inside homes
◍ __________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..
Answer: R-32
◍ LFL.
Answer: Lowest % of vapor in air that could ignite
◍ Empty flammable refrigerant cylinders should be punctured with a
___________________________..
Answer: non-sparking pick
◍ Liquid Charging.
Answer: Required method for R-454B (and best for R-32)
◍ Patterns of adding refrigerant of at least
______________________________________ should be considered proof
of a leak..
"CHAUFFEUR'S"
LICENSE TEST ACTUAL EXAM PAPER
2026 QUESTIONS WITH ANSWERS
GRADED A+
◍ Some of the variables that affect the allowable system charge of an A2L
system are:.
Answer: · system design and capacity (in Btu/h),· length and size of the
refrigerant piping,· the indoor volume (ft3) of the installation area,· the
occupancy classification of the structure.
◍ What are the A2L refrigerants and what's important to know about them?.
Answer: Refrigerants such as R-32 and R-454B that are low in toxicity and
mildly flammable.
◍ R-32.
Answer: A refrigerant with a GWP (Global Warming Potential) of 675, used
as a replacement for R-410A.
◍ R-454B.
Answer: A refrigerant with a GWP of 466, serving as an alternative to
R-410A.
◍ 20. When charging a new A2L system,
_______________________________________________ must be recorded
on a label affixed to the unit by the installing technician..
Answer: the total charge weight (and date of charge)
◍ AIM Act.
, Answer: Federal law phasing down high-GWP refrigerants.
◍ For A2L-charged systems, the maximum allowable charge is not
______________________________..
Answer: a universal figure
◍ GWP.
Answer: Global Warming Potential, a measure of how much heat a
greenhouse gas traps in the atmosphere.
◍ Common Question: Why the change?.
Answer: New rules require lower-emission refrigerants — these are better
for the planet and future-proof your home.
◍ Common Question: Is the new refrigerant it safe?.
Answer: Yes — they're low toxicity and only mildly flammable in lab
conditions. Systems include built-in safety features.
◍ Common Question: Will I save money?.
Answer: Yes — most new systems use less refrigerant and more efficient
parts like inverter compressors.
◍ ________________________________ components such as the contactor
or capacitor are designed to be enclosed, isolating the electrical contacts
from the atmosphere..
Answer: Intrinsically safe
◍ Common Question: Can I keep my current unit?.
Answer: Unfortunately not — these refrigerants require new equipment
designed for their chemistry and safety.
◍ Common Question: Will it leak?.
Answer: Not more than before — and with a smaller charge size, leaks are
less impactful.
◍ ___________ 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..
, Answer: R-1234yf
◍ Environmental impact of R-410A.
Answer: GWP of R-410A is 2088, indicating its high potential for global
warming.
◍ __________ 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°F)..
Answer: R-454B
◍ EPA 608.
Answer: Certification still required for R-32 and R-454B
◍ Fractionation.
Answer: Unbalanced refrigerant from vapor charging a blend
◍ IS Tools.
Answer: Intrinsically Safe — avoid sparks inside homes
◍ __________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..
Answer: R-32
◍ LFL.
Answer: Lowest % of vapor in air that could ignite
◍ Empty flammable refrigerant cylinders should be punctured with a
___________________________..
Answer: non-sparking pick
◍ Liquid Charging.
Answer: Required method for R-454B (and best for R-32)
◍ Patterns of adding refrigerant of at least
______________________________________ should be considered proof
of a leak..
