A2L ANSWERS AND QUESTIONS SET A+
✔✔Minimizing or reducing the possibility of an ignition event or accident - ✔✔Mitigation
✔✔Depending on installation, some systems that are charged with a flammable
refrigerant may require an __________ as a mitigation step. - ✔✔indoor fan
✔✔An ___________ behaves like a single compound refrigerant. - ✔✔Azeotropic
refrigerant blend
✔✔A ____________ is a mixture of 2 or more refrigerants that can separate, or
fractionate, into its original components. - ✔✔Zeotropic refrigerant blend
✔✔An __________ designation is used when refrigerant blends are composed of the
same refrigerants, but with different percentages of each. - ✔✔Uppercase letter (A,B,C)
✔✔_____________ are highly flammable and require additional technician training for
safe use. - ✔✔Hydrocarbon refrigerants
✔✔_______________ of a refrigerant is the minimum concentration of a refrigerant that
can propagate a flame through a consistent mixture of the refrigerant and air under
specified test conditions. - ✔✔Lower Flammability Limit (LFL)
✔✔Certain refrigerants, such as R-290 and R-600a are exempt from the _________ -
✔✔EPA's Recovery Mandate
✔✔Once a flammable refrigerant has been recovered and stored in a recovery cylinder,
it must be placed how far away from the work area before a system repair or installation
is started? - ✔✔25 feet
✔✔Printed on the recovery tank are the DOT ___________ - ✔✔pressure rating and
the retest date
✔✔Minimizing or reducing the possibility of an ignition event or accident - ✔✔Mitigation
✔✔Depending on installation, some systems that are charged with a flammable
refrigerant may require an __________ as a mitigation step. - ✔✔indoor fan
✔✔An ___________ behaves like a single compound refrigerant. - ✔✔Azeotropic
refrigerant blend
✔✔A ____________ is a mixture of 2 or more refrigerants that can separate, or
fractionate, into its original components. - ✔✔Zeotropic refrigerant blend
✔✔An __________ designation is used when refrigerant blends are composed of the
same refrigerants, but with different percentages of each. - ✔✔Uppercase letter (A,B,C)
✔✔_____________ are highly flammable and require additional technician training for
safe use. - ✔✔Hydrocarbon refrigerants
✔✔_______________ of a refrigerant is the minimum concentration of a refrigerant that
can propagate a flame through a consistent mixture of the refrigerant and air under
specified test conditions. - ✔✔Lower Flammability Limit (LFL)
✔✔Certain refrigerants, such as R-290 and R-600a are exempt from the _________ -
✔✔EPA's Recovery Mandate
✔✔Once a flammable refrigerant has been recovered and stored in a recovery cylinder,
it must be placed how far away from the work area before a system repair or installation
is started? - ✔✔25 feet
✔✔Printed on the recovery tank are the DOT ___________ - ✔✔pressure rating and
the retest date
