RETA CARO Exam Questions and Answers
(Verified Answers) Latest 2025, Exams of
Nursing
Which refrigerant has the highest mass flow requirement at the same evaporator and condensing
temperature? - CORRECT ANSWERS CFC-12
which refrigerant is the first to be phased out by Montreal Protocol - CORRECT ANSWERS CFC-12
As the ratio between the evaporator and condensing pressure increases - CORRECT ANSWERS
the theoretical discharge temperature increases
Under the Montreal Protocol - CORRECT ANSWERS 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 ANSWERS 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 ANSWERS
oxygen deprivation
the published lower explosive limit for ammonia is - CORRECT ANSWERS 16%
under normal conditions an ammonia vessel should only be filled to what percentage - CORRECT
ANSWERS 80%
(Verified Answers) Latest 2025, Exams of
Nursing
Which refrigerant has the highest mass flow requirement at the same evaporator and condensing
temperature? - CORRECT ANSWERS CFC-12
which refrigerant is the first to be phased out by Montreal Protocol - CORRECT ANSWERS CFC-12
As the ratio between the evaporator and condensing pressure increases - CORRECT ANSWERS
the theoretical discharge temperature increases
Under the Montreal Protocol - CORRECT ANSWERS 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 ANSWERS 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 ANSWERS
oxygen deprivation
the published lower explosive limit for ammonia is - CORRECT ANSWERS 16%
under normal conditions an ammonia vessel should only be filled to what percentage - CORRECT
ANSWERS 80%
