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Exam (elaborations)

RETA CARO UPDATED Exam Questions and CORRECT Answers

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RETA CARO UPDATED Exam Questions and CORRECT Answers 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 ANSWERCFC-12 As the ratio b...

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  • August 9, 2024
  • 3
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • RETA CARO
  • RETA CARO
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MGRADES
RETA CARO UPDATED Exam Questions
and CORRECT Answers

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

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