1|Page
Low GWP Refrigerant Safety Exam||Verified Questions
And Answers Practice Questions with Solutions
Newest | Already Graded A+||Newest Exam!!!
Department of Transportation (DOT) standards require
that a recovery tank should not be fill beyond what percent
of its capacity? - Answer-80%
Refillable cylinders are typically certified for how many
years of use before they must be hydrostatically tested? -
Answer-5 years
For most residential and light commercial heat pump and
air conditioning systems containing less than 200 pounds
of either R-22 or R-410A, the required recovery level is -
Answer-0 psig
A complex process that cleans, filters, and tests a
refrigerant to meet the "like-new" purity level specified in
AHRI Standard 700 is - Answer-reclamation
The two most common non-condensables found in
HVACR systems are - Answer-air and nitrogen
,2|Page
When sizing and selecting system components for
equipment that is charged with a zeotropic or near-
azeotropic refrigerant blend, what method should be
used? - Answer-midpoint
When calculating the subcooling of a system charged with
a zeotropic or near-azeotropic refrigerant blend, what
values should be used? - Answer-bubble point
The process of transferring refrigerant from a sealed
system to a refillable cylinder (recovery tank) approved by
the Department of Transportation (DOT) is called -
Answer-recovery
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 - Answer-destroyed at the owner's
expense
When calculating the superheat of a system charged with
a zeotropic or near-azeotropic refrigerant blend, which of
the following values should be used? - Answer-dew point
, 3|Page
DOT rules prohibit smoking within how many feet of a
cylinder containing a flammable gas? - Answer-25 feet
When working with flammable refrigerants - Answer-a fire
extinguisher must be on site
Prior to beginning work on a jobsite where equipment that
is charged with a flammable refrigerant will be used -
Answer-the jobsite should be evaluated for safety hazards
such as possible ignition sources or the presence of
flammable vapors.
What is an example of a zeotropic refrigerant blend? -
Answer-R-452B
The stage of the evacuation process which removes
moisture from a system through evaporation is called -
Answer-dehydration
What is classified as an A2L refrigerant? - Answer-R-32
Low GWP Refrigerant Safety Exam||Verified Questions
And Answers Practice Questions with Solutions
Newest | Already Graded A+||Newest Exam!!!
Department of Transportation (DOT) standards require
that a recovery tank should not be fill beyond what percent
of its capacity? - Answer-80%
Refillable cylinders are typically certified for how many
years of use before they must be hydrostatically tested? -
Answer-5 years
For most residential and light commercial heat pump and
air conditioning systems containing less than 200 pounds
of either R-22 or R-410A, the required recovery level is -
Answer-0 psig
A complex process that cleans, filters, and tests a
refrigerant to meet the "like-new" purity level specified in
AHRI Standard 700 is - Answer-reclamation
The two most common non-condensables found in
HVACR systems are - Answer-air and nitrogen
,2|Page
When sizing and selecting system components for
equipment that is charged with a zeotropic or near-
azeotropic refrigerant blend, what method should be
used? - Answer-midpoint
When calculating the subcooling of a system charged with
a zeotropic or near-azeotropic refrigerant blend, what
values should be used? - Answer-bubble point
The process of transferring refrigerant from a sealed
system to a refillable cylinder (recovery tank) approved by
the Department of Transportation (DOT) is called -
Answer-recovery
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 - Answer-destroyed at the owner's
expense
When calculating the superheat of a system charged with
a zeotropic or near-azeotropic refrigerant blend, which of
the following values should be used? - Answer-dew point
, 3|Page
DOT rules prohibit smoking within how many feet of a
cylinder containing a flammable gas? - Answer-25 feet
When working with flammable refrigerants - Answer-a fire
extinguisher must be on site
Prior to beginning work on a jobsite where equipment that
is charged with a flammable refrigerant will be used -
Answer-the jobsite should be evaluated for safety hazards
such as possible ignition sources or the presence of
flammable vapors.
What is an example of a zeotropic refrigerant blend? -
Answer-R-452B
The stage of the evacuation process which removes
moisture from a system through evaporation is called -
Answer-dehydration
What is classified as an A2L refrigerant? - Answer-R-32
