LOW GWP REFRIGERANT EXAM AND
PRACTICE EXAM 2026/2027 WITH ACTUAL
CORRECT QUESTIONS AND VERIFIED
DETAILED ANSWERS |CURRENTLY TESTING
QUESTIONS AND SOLUTIONS|ALREADY
GRADED A+|NEWEST |BRAND NEW VERSION!!|
|JUST RELEASED
Before beginning the installation of a system that is charged with an A2L refrigerant:
a local code official must approve the site of the installation.
NFPA 704 hazard placards must be placed in visible locations around the perimeter of the
jobsite.
permanent mechanical ventilation must be installed in the structure.
verify that all the components being installed are designed for use with A2L refrigerants.
verify that all the components being installed are designed for use with A2L refrigerants.
When installing a system that is charged with a flammable refrigerant, which of the
following can be installed to energize mitigation responses?
Active refrigerant sensor.
Combustion gas leak detector.
Passive refrigerant sensor.
1|Page
,Wi-Fi enabled digital thermostat.
Active refrigerant sensor.
Intrinsically safe electrical components:
can be operated in wet locations or underwater.
can be worked on while live within a flammable atmosphere.
can only be operated while being monitored by a service professional.
can operate outside of their listed design conditions for a brief period.
can be worked on while live within a flammable atmosphere.
When performing service on the electrical components of a system that is charged with an
A2L refrigerant, which of the following is an unacceptable practice?
Discharging all capacitors with a screwdriver prior to beginning any repair.
Replace components only with parts specified by the manufacturer (OEM).
Verify that the system is properly grounded prior to beginning any repair.
When the system is de-energized, employ proper lockout and tagout procedures.
Discharging all capacitors with a screwdriver prior to beginning any repair.
Patterns of adding refrigerant to an A2L system of at least once per three-year period,
should be considered:
2|Page
, a symptom of a faulty compressor.
proof of a leak.
verification of the efficiency of any installed mitigation strategies.
within the range of permissible emissions.
proof of a leak
After reaching the required recovery level on a system that is charged with an A2L
refrigerant:
a nitrogen sweep should be done to remove any residual refrigerant vapor.
an alcohol-based solution must be used to remove any oil or grease.
the refractive index of the compressor must be tested.
the system must stand idle for 60 minutes prior to beginning any work on it.
a nitrogen sweep should be done to remove any residual refrigerant vapor.
After installation, the refrigerant piping for an A2L system must be:
cleaned with an alcohol-based solution to remove grease and oil.
pressurized with dry nitrogen to perform a leak test.
pressurized with a non-flammable refrigerant (A1) to perform a leak test.
vibration tested using whichever method is approved by the local code authority.
3|Page
PRACTICE EXAM 2026/2027 WITH ACTUAL
CORRECT QUESTIONS AND VERIFIED
DETAILED ANSWERS |CURRENTLY TESTING
QUESTIONS AND SOLUTIONS|ALREADY
GRADED A+|NEWEST |BRAND NEW VERSION!!|
|JUST RELEASED
Before beginning the installation of a system that is charged with an A2L refrigerant:
a local code official must approve the site of the installation.
NFPA 704 hazard placards must be placed in visible locations around the perimeter of the
jobsite.
permanent mechanical ventilation must be installed in the structure.
verify that all the components being installed are designed for use with A2L refrigerants.
verify that all the components being installed are designed for use with A2L refrigerants.
When installing a system that is charged with a flammable refrigerant, which of the
following can be installed to energize mitigation responses?
Active refrigerant sensor.
Combustion gas leak detector.
Passive refrigerant sensor.
1|Page
,Wi-Fi enabled digital thermostat.
Active refrigerant sensor.
Intrinsically safe electrical components:
can be operated in wet locations or underwater.
can be worked on while live within a flammable atmosphere.
can only be operated while being monitored by a service professional.
can operate outside of their listed design conditions for a brief period.
can be worked on while live within a flammable atmosphere.
When performing service on the electrical components of a system that is charged with an
A2L refrigerant, which of the following is an unacceptable practice?
Discharging all capacitors with a screwdriver prior to beginning any repair.
Replace components only with parts specified by the manufacturer (OEM).
Verify that the system is properly grounded prior to beginning any repair.
When the system is de-energized, employ proper lockout and tagout procedures.
Discharging all capacitors with a screwdriver prior to beginning any repair.
Patterns of adding refrigerant to an A2L system of at least once per three-year period,
should be considered:
2|Page
, a symptom of a faulty compressor.
proof of a leak.
verification of the efficiency of any installed mitigation strategies.
within the range of permissible emissions.
proof of a leak
After reaching the required recovery level on a system that is charged with an A2L
refrigerant:
a nitrogen sweep should be done to remove any residual refrigerant vapor.
an alcohol-based solution must be used to remove any oil or grease.
the refractive index of the compressor must be tested.
the system must stand idle for 60 minutes prior to beginning any work on it.
a nitrogen sweep should be done to remove any residual refrigerant vapor.
After installation, the refrigerant piping for an A2L system must be:
cleaned with an alcohol-based solution to remove grease and oil.
pressurized with dry nitrogen to perform a leak test.
pressurized with a non-flammable refrigerant (A1) to perform a leak test.
vibration tested using whichever method is approved by the local code authority.
3|Page
