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RETA CARO EXAM QUESTIONS WITH 100% VERIFIED ANSWERS

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RETA CARO EXAM QUESTIONS WITH 100% VERIFIED ANSWERS Which refrigerant has the highest mass flow requirement at the same evaporator and condensing temperature? CFC-12 which refrigerant is the first to be phased out by Montreal Protocol CFC-12 As the ratio between the evaporator and cond...

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  • June 12, 2024
  • 2
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
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RETA CARO EXAM QUESTIONS WITH 100%
VERIFIED ANSWERS
Which refrigerant has the highest mass flow requirement at the same evaporator and condensing
temperature?
CFC-12


which refrigerant is the first to be phased out by Montreal Protocol
CFC-12


As the ratio between the evaporator and condensing pressure increases
the theoretical discharge temperature increases


Under the Montreal Protocol
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
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
oxygen deprivation


the published lower explosive limit for ammonia is
16%


under normal conditions an ammonia vessel should only be filled to what percentage
80%


which refrigerant can be detected by its odor even in low concentrations
R-717


Which refrigerant would have the lowest condensing pressure at 95 Degrees F
CFC-11


A cartridge type gas mask may legally be used for personal protection when
the type of the hazard is known and the concentration is known


a vapor can NOT be
subcooled


what kind of measure is a to of refrigeration
a rate of heat transfer in BTUs per Unit of time

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