1|Page
Low GWP refrigerant practice 2026/2027 BANK QUESTIONS
WITH DETAILED VERIFIED ANSWERS / EXAM QUESTIONS
WILL COME FROM HERE (100% CORRECT ANSWERS/ A+
GRADED
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 flmmability limit (LFL).
Upper explosive limit (UEL). - ANSWERS--Lower flmmability limit (LFL).
The first stage of the evacuation process which removes non-
condensables from a system is called:
degassing.
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dehydration.
recovery.
Recycling. - ANSWERS--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. - ANSWERS--It must be placed a safe
distance away from the work area before a system repair or installation
is started.
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Which of the following refrigerants is exempt from the EPA's recovery
mandate?
R-32
R-290
R-454B
R-1234yf - ANSWERS--R-290
Which one of the following refrigerants is classified as an A3
refrigerant?
R-32
R-290
R-717
R-1234yf - ANSWERS--R-290
Atmospheric pressure (0 PSIG) is equal to approximately:
25 inches of mercury.
500 microns.
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760,000 inches of mercury.
760,000 microns. - ANSWERS--760,000
An uppercase letter designation (R-407A, R-407B, R-407C) is used when
refrigerant blends are:
Composed of the same refrigerant, but with the same percentages of
each.
Composed of different refrigerants but have the same thermodynamic
properties.
Composed of the same refrigerants but manufactured by different
companies.
Composed of the same refrigerants, but with different percentages of
each. - ANSWERS--Composed of the same refrigerants, but with
different percentages of each.
Flammable refrigerant cylinders must have:
Dip tube allowing for liquid transfer.
Low GWP refrigerant practice 2026/2027 BANK QUESTIONS
WITH DETAILED VERIFIED ANSWERS / EXAM QUESTIONS
WILL COME FROM HERE (100% CORRECT ANSWERS/ A+
GRADED
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 flmmability limit (LFL).
Upper explosive limit (UEL). - ANSWERS--Lower flmmability limit (LFL).
The first stage of the evacuation process which removes non-
condensables from a system is called:
degassing.
,2|Page
dehydration.
recovery.
Recycling. - ANSWERS--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. - ANSWERS--It must be placed a safe
distance away from the work area before a system repair or installation
is started.
,3|Page
Which of the following refrigerants is exempt from the EPA's recovery
mandate?
R-32
R-290
R-454B
R-1234yf - ANSWERS--R-290
Which one of the following refrigerants is classified as an A3
refrigerant?
R-32
R-290
R-717
R-1234yf - ANSWERS--R-290
Atmospheric pressure (0 PSIG) is equal to approximately:
25 inches of mercury.
500 microns.
, 4|Page
760,000 inches of mercury.
760,000 microns. - ANSWERS--760,000
An uppercase letter designation (R-407A, R-407B, R-407C) is used when
refrigerant blends are:
Composed of the same refrigerant, but with the same percentages of
each.
Composed of different refrigerants but have the same thermodynamic
properties.
Composed of the same refrigerants but manufactured by different
companies.
Composed of the same refrigerants, but with different percentages of
each. - ANSWERS--Composed of the same refrigerants, but with
different percentages of each.
Flammable refrigerant cylinders must have:
Dip tube allowing for liquid transfer.
