RETA CARO Test with all Correct & 100% Verified Answers
|Guaranteed to Pass
Which refrigerant has the highest mass flow requirement at the same evaporator and
condensing temperature? ✔Correct Answer-CFC-12
which refrigerant is the first to be phased out by Montreal Protocol ✔Correct Answer-CFC-12
As the ratio between the evaporator and condensing pressure increases ✔Correct Answer-the
theoretical discharge temperature increases
Under the Montreal Protocol ✔Correct Answer-as long as a technician does not perform work
on the refrigerant containing portions of a system they do not need to be certified
Refrigerant leaks are detected using ✔Correct Answer-Either a sulfur stick on ammonia or
electronic leak detector for CFCs or HCFCs
the primary reason for concern about CFC-12 concentration in an engine room is ✔Correct
Answer-oxygen deprivation
the published lower explosive limit for ammonia is ✔Correct Answer-16%
under normal conditions an ammonia vessel should only be filled to what percentage
✔Correct Answer-80%
which refrigerant can be detected by its odor even in low concentrations ✔Correct Answer-R-
717
Which refrigerant would have the lowest condensing pressure at 95 Degrees F ✔Correct
Answer-CFC-11
A cartridge type gas mask may legally be used for personal protection when ✔Correct
Answer-the type of the hazard is known and the concentration is known
a vapor can NOT be ✔Correct Answer-subcooled
what kind of measure is a to of refrigeration ✔Correct Answer-a rate of heat transfer in BTUs
per Unit of time
which two forms of heat transfer is most common in refrigeration ✔Correct Answer-
conduction and convecton
|Guaranteed to Pass
Which refrigerant has the highest mass flow requirement at the same evaporator and
condensing temperature? ✔Correct Answer-CFC-12
which refrigerant is the first to be phased out by Montreal Protocol ✔Correct Answer-CFC-12
As the ratio between the evaporator and condensing pressure increases ✔Correct Answer-the
theoretical discharge temperature increases
Under the Montreal Protocol ✔Correct Answer-as long as a technician does not perform work
on the refrigerant containing portions of a system they do not need to be certified
Refrigerant leaks are detected using ✔Correct Answer-Either a sulfur stick on ammonia or
electronic leak detector for CFCs or HCFCs
the primary reason for concern about CFC-12 concentration in an engine room is ✔Correct
Answer-oxygen deprivation
the published lower explosive limit for ammonia is ✔Correct Answer-16%
under normal conditions an ammonia vessel should only be filled to what percentage
✔Correct Answer-80%
which refrigerant can be detected by its odor even in low concentrations ✔Correct Answer-R-
717
Which refrigerant would have the lowest condensing pressure at 95 Degrees F ✔Correct
Answer-CFC-11
A cartridge type gas mask may legally be used for personal protection when ✔Correct
Answer-the type of the hazard is known and the concentration is known
a vapor can NOT be ✔Correct Answer-subcooled
what kind of measure is a to of refrigeration ✔Correct Answer-a rate of heat transfer in BTUs
per Unit of time
which two forms of heat transfer is most common in refrigeration ✔Correct Answer-
conduction and convecton
