Low GWP Refrigerant Practice 2026-
2027 Questions With Correct Answers
A+ Grade
The minimum concentration of a refrigerant that can propagate a flame through a consistent mixture of
the refrigerant and air is known as the:
Acute toxicity exposure limit (ATELL).
Immediately dangerous to life or health concentration (IDLH).
Lower flammability limit (LFL).
Upper explosive limit (UEL). - CORRECT ANSWER -Lower flammability limit (LFL).
The first stage of the evacuation process which removes non-condensables from a system is called:
degassing.
dehydration.
recovery.
Recycling. - CORRECT ANSWER -recovery
Once a flammable refrigerant has been recovered and stored in a cylinder:
It can be taken a safe distance from the jobsite and vented to the atmosphere.
, It must be placed a safe distance away from the work area before a system repair or installation is
started.
It must be placed in ice to ensure it stays below the refrigerant's ignition temperature.
It should be returned toa reclamation facility prior to beginning the installation of new equipment. -
CORRECT ANSWER -It must be placed a safe distance away from the work area before a system repair or
installation is started.
Which of the following refrigerants is exempt from the EPA's recovery mandate?
R-32
R-290
R-454B
R-1234yf - CORRECT ANSWER -R-290
Which one of the following refrigerants is classified as an A3 refrigerant?
R-32
R-290
R-717
R-1234yf - CORRECT ANSWER -R-290
Atmospheric pressure (0 PSIG) is equal to approximately:
25 inches of mercury.
2027 Questions With Correct Answers
A+ Grade
The minimum concentration of a refrigerant that can propagate a flame through a consistent mixture of
the refrigerant and air is known as the:
Acute toxicity exposure limit (ATELL).
Immediately dangerous to life or health concentration (IDLH).
Lower flammability limit (LFL).
Upper explosive limit (UEL). - CORRECT ANSWER -Lower flammability limit (LFL).
The first stage of the evacuation process which removes non-condensables from a system is called:
degassing.
dehydration.
recovery.
Recycling. - CORRECT ANSWER -recovery
Once a flammable refrigerant has been recovered and stored in a cylinder:
It can be taken a safe distance from the jobsite and vented to the atmosphere.
, It must be placed a safe distance away from the work area before a system repair or installation is
started.
It must be placed in ice to ensure it stays below the refrigerant's ignition temperature.
It should be returned toa reclamation facility prior to beginning the installation of new equipment. -
CORRECT ANSWER -It must be placed a safe distance away from the work area before a system repair or
installation is started.
Which of the following refrigerants is exempt from the EPA's recovery mandate?
R-32
R-290
R-454B
R-1234yf - CORRECT ANSWER -R-290
Which one of the following refrigerants is classified as an A3 refrigerant?
R-32
R-290
R-717
R-1234yf - CORRECT ANSWER -R-290
Atmospheric pressure (0 PSIG) is equal to approximately:
25 inches of mercury.
