A2L PRACTICE EXAM 4 QUESTIONS WITH ACCURATE
ANSWERS
A complex process that cleans, filters, and tests a refrigerant to meet the "like
new" purity level specified in AHRI standard 700 is______________ correct
answer Reclamation
A metric that is used to measure a refrigerant environmental impact as a
greenhouse gas is_________________ correct answer Global warming
potential(GWP)
A refrigerant blend behaves like a single component refrigerant is called
a_________________ correct answer azeotropic blend
A2L refrigerant have a flammability potential that is higher
than________________ correct answer A1 refrigerant
After installation, the refrigerant piping for an A2L system must
be_______________ correct answer Pressurized with dry nitrogen to perform a
leak test
Before beginning the installation of a system that is charged with an A2L
refrigerant____________ correct answer Verify that all the components being
installed are designed for use with A2L refrigerant
DOT rules, prohibit smoking with how many feet of a cylinder containing a
flammable gas________ correct answer 25 feet
, Flammable refrigerant cylinders must have a____________ correct answer Red
band on the top of the container
For most residential and light commercial heat pump and air conditioning systems
containing less than 200 pounds of either R-22 or R410A, the required recovery
level is correct answer 0 psig
How many steps are involved in the evacuation process? correct answer 2
If different refrigerant types are mixed in the same tank, the mixture may not be
able to be recycled or reclaimed, and may have to be______________ correct
answer Destroyed at the owners expense
Intrinsically safe electrical components_______________ correct answer Can be
worked on while live within a flammable atmosphere
Liquid refrigerant recovery is faster than vapor recovery, however, the downside
to liquid recovery is_________________ correct answer Oil loss
Patterns of adding refrigerant to an A2 L system of at least once per three year
period should be considered____________ correct answer Proof of a leak
Prior to beginning work on a job site where equipment that is charged with a
flammable refrigerant will be used_____________________ correct answer The
job site should be evaluated for safety hazards, such as possible ignition sources,
or the presence of flammable vapors
ANSWERS
A complex process that cleans, filters, and tests a refrigerant to meet the "like
new" purity level specified in AHRI standard 700 is______________ correct
answer Reclamation
A metric that is used to measure a refrigerant environmental impact as a
greenhouse gas is_________________ correct answer Global warming
potential(GWP)
A refrigerant blend behaves like a single component refrigerant is called
a_________________ correct answer azeotropic blend
A2L refrigerant have a flammability potential that is higher
than________________ correct answer A1 refrigerant
After installation, the refrigerant piping for an A2L system must
be_______________ correct answer Pressurized with dry nitrogen to perform a
leak test
Before beginning the installation of a system that is charged with an A2L
refrigerant____________ correct answer Verify that all the components being
installed are designed for use with A2L refrigerant
DOT rules, prohibit smoking with how many feet of a cylinder containing a
flammable gas________ correct answer 25 feet
, Flammable refrigerant cylinders must have a____________ correct answer Red
band on the top of the container
For most residential and light commercial heat pump and air conditioning systems
containing less than 200 pounds of either R-22 or R410A, the required recovery
level is correct answer 0 psig
How many steps are involved in the evacuation process? correct answer 2
If different refrigerant types are mixed in the same tank, the mixture may not be
able to be recycled or reclaimed, and may have to be______________ correct
answer Destroyed at the owners expense
Intrinsically safe electrical components_______________ correct answer Can be
worked on while live within a flammable atmosphere
Liquid refrigerant recovery is faster than vapor recovery, however, the downside
to liquid recovery is_________________ correct answer Oil loss
Patterns of adding refrigerant to an A2 L system of at least once per three year
period should be considered____________ correct answer Proof of a leak
Prior to beginning work on a job site where equipment that is charged with a
flammable refrigerant will be used_____________________ correct answer The
job site should be evaluated for safety hazards, such as possible ignition sources,
or the presence of flammable vapors
