1|Page
LOW GWP REFRIGERANT SAFETY EXAM
QUESTIONS AND ANSWERS PRACTICE QUESTIONS
WITH SOLUTIONS NEWEST 2026 2027 | ALREADY
GRADED A+
What must be recorded on the label of A2L equipment after
installation? ......ANSWER......Date that the pressure test and
evacuation were completed.
What does EPA Section 608 regulations require for systems charged
with flammable refrigerants? ......ANSWER......An EPA-approved liquid
refrigerant receiver marked with a red stripe.
What is used to determine the maximum concentration of a refrigerant
allowed in an occupied space? ......ANSWER......Refrigerant
Concentration Limits (RCL).
What should be done to reduce ignition sources in a flammable
refrigerant work area? ......ANSWER......Designate a safe perimeter
around the work area.
What must refrigerant cylinders containing over 2.2 lbs. of a 2L
refrigerant be equipped with? ......ANSWER......A pressure relief valve.
pg. 1
,2|Page
What is true regarding lower flammability HFO refrigerants
......ANSWER......They must be recovered
Which of the following is an HFO refrigerant ......ANSWER......R-1234yf
The rate at which a flame front spreads relative to the unburned gas
ahead of the flame is called the ......ANSWER......Burning velocity
What is one of the factors to determine the max allowable charge of an
A2L system ......ANSWER......The cubic feet of airspace served by the
equipment
Upon completion of an A2L system installation ......ANSWER......The
manufacturers literature should be reviewed with and left with the
equipment
If the pressure relief valve has been activated on a system that has been
charged with a flammable refrigerant ......ANSWER......It should be
replaced w a new valve w the same ratings
Which of the following is an example of an industry accepted mitigation
strategy that can be used when installing equipment with an A2L
refrigerant ......ANSWER......Permanent space ventilation
pg. 2
,3|Page
Refrigerant piping for an A2L system that is installed inside of a wall or
floor space, where it passes through joists or studs, must be
......ANSWER......Protected by a strike plate or shielding
After installation, the refrigerant piping for an AL system must be:
......ANSWER......pressurized with dry nitrogen to perform a leak test.
After reaching the required recovery level on a system that is charged
with an A2L refrigerant: ......ANSWER......a nitrogen sweep should be
done to remove any residual refrigerant vapor.
Patterns of adding refrigerant to an AL system of at least once per
three-year period, should be considered: ......ANSWER......Proof of a
leak
When performing service on the electrical components of a system that
is charged with an A2L refrigerant, ......ANSWER......Discharge all
capacitors with a screwdriver prior to beginning any repair.
Intrinsically safe electrical components; ......ANSWER......can be worked
on while live within a flammable atmosphere.
When installing a system that is charged with a flammable refrigerant,
which of the following can be installed to energize mitigation
responses? ......ANSWER......Active refrigerant sensor
pg. 3
, 4|Page
Before beginning the installation of a system that is charged with an A2L
refrigerant; ......ANSWER......verify that all the components being
installed are designed for use with A2L refrigerants.
Which of the following must be done when removing an existing R-
410A system and installing a system that is charged with an A2?
......ANSWER......The installation area must be evaluated to ensure it
meets the manufacturer's specifications and local building codes.
Where can information regarding recommended personal protective
equipment (PPE) for a specific refrigerant be found?
......ANSWER......The Safety Data Sheets (SDS) for the refrigerant.
When a technician is disposing of a piece of equipment that was
charged with a flammable refrigerant, it must have a label affixed to it
which states; ......ANSWER......the date that equipment was
decommissioned and the refrigerant was recovered.
What does GWP stand for in refrigerant safety? ......ANSWER......Global
Warming Potential
What types of refrigerants are discussed in this manual?
......ANSWER......Flammable and mildly flammable refrigerants
pg. 4
LOW GWP REFRIGERANT SAFETY EXAM
QUESTIONS AND ANSWERS PRACTICE QUESTIONS
WITH SOLUTIONS NEWEST 2026 2027 | ALREADY
GRADED A+
What must be recorded on the label of A2L equipment after
installation? ......ANSWER......Date that the pressure test and
evacuation were completed.
What does EPA Section 608 regulations require for systems charged
with flammable refrigerants? ......ANSWER......An EPA-approved liquid
refrigerant receiver marked with a red stripe.
What is used to determine the maximum concentration of a refrigerant
allowed in an occupied space? ......ANSWER......Refrigerant
Concentration Limits (RCL).
What should be done to reduce ignition sources in a flammable
refrigerant work area? ......ANSWER......Designate a safe perimeter
around the work area.
What must refrigerant cylinders containing over 2.2 lbs. of a 2L
refrigerant be equipped with? ......ANSWER......A pressure relief valve.
pg. 1
,2|Page
What is true regarding lower flammability HFO refrigerants
......ANSWER......They must be recovered
Which of the following is an HFO refrigerant ......ANSWER......R-1234yf
The rate at which a flame front spreads relative to the unburned gas
ahead of the flame is called the ......ANSWER......Burning velocity
What is one of the factors to determine the max allowable charge of an
A2L system ......ANSWER......The cubic feet of airspace served by the
equipment
Upon completion of an A2L system installation ......ANSWER......The
manufacturers literature should be reviewed with and left with the
equipment
If the pressure relief valve has been activated on a system that has been
charged with a flammable refrigerant ......ANSWER......It should be
replaced w a new valve w the same ratings
Which of the following is an example of an industry accepted mitigation
strategy that can be used when installing equipment with an A2L
refrigerant ......ANSWER......Permanent space ventilation
pg. 2
,3|Page
Refrigerant piping for an A2L system that is installed inside of a wall or
floor space, where it passes through joists or studs, must be
......ANSWER......Protected by a strike plate or shielding
After installation, the refrigerant piping for an AL system must be:
......ANSWER......pressurized with dry nitrogen to perform a leak test.
After reaching the required recovery level on a system that is charged
with an A2L refrigerant: ......ANSWER......a nitrogen sweep should be
done to remove any residual refrigerant vapor.
Patterns of adding refrigerant to an AL system of at least once per
three-year period, should be considered: ......ANSWER......Proof of a
leak
When performing service on the electrical components of a system that
is charged with an A2L refrigerant, ......ANSWER......Discharge all
capacitors with a screwdriver prior to beginning any repair.
Intrinsically safe electrical components; ......ANSWER......can be worked
on while live within a flammable atmosphere.
When installing a system that is charged with a flammable refrigerant,
which of the following can be installed to energize mitigation
responses? ......ANSWER......Active refrigerant sensor
pg. 3
, 4|Page
Before beginning the installation of a system that is charged with an A2L
refrigerant; ......ANSWER......verify that all the components being
installed are designed for use with A2L refrigerants.
Which of the following must be done when removing an existing R-
410A system and installing a system that is charged with an A2?
......ANSWER......The installation area must be evaluated to ensure it
meets the manufacturer's specifications and local building codes.
Where can information regarding recommended personal protective
equipment (PPE) for a specific refrigerant be found?
......ANSWER......The Safety Data Sheets (SDS) for the refrigerant.
When a technician is disposing of a piece of equipment that was
charged with a flammable refrigerant, it must have a label affixed to it
which states; ......ANSWER......the date that equipment was
decommissioned and the refrigerant was recovered.
What does GWP stand for in refrigerant safety? ......ANSWER......Global
Warming Potential
What types of refrigerants are discussed in this manual?
......ANSWER......Flammable and mildly flammable refrigerants
pg. 4
