RETA CARO 2024

RETA CARO 2024 Which refrigerant has the highest mass flow requirement at the same evaporator and condensing temperature? - answer-CFC-12 which refrigerant is the first to be phased out by Montreal Protocol - answer-CFC-12 As the ratio between the evaporator and condensing pressure increases - answer-the theoretical discharge temperature increases Under the Montreal Protocol - 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 - 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 - answer-oxygen deprivation the published lower explosive limit for ammonia is - answer-16% under normal conditions an ammonia vessel should only be filled to what percentage - answer-80% which refrigerant can be detected by its odor even in low concentrations - answer-R-717 Which refrigerant would have the lowest condensing pressure at 95 Degrees F - answer-CFC-11