RETA CARO Exam (100 out of 100) Questions and Verified Answers (GRADED A)

RETA CARO Exam (100 out of 100) Questions and

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