Low GWP Refrigerant Practice Questions & Answers PDF – HVAC
Refrigeration Exam Prep, Environmental Compliance &
Sustainable Cooling Study Guide
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). - CORRECT ANSWER -Lower flmmability 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.
500 microns.
760,000 inches of mercury.
760,000 microns. - CORRECT ANSWER -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.
Refrigeration Exam Prep, Environmental Compliance &
Sustainable Cooling Study Guide
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). - CORRECT ANSWER -Lower flmmability 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.
500 microns.
760,000 inches of mercury.
760,000 microns. - CORRECT ANSWER -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.
