RETA CARO Exam 100 out of 100 Questions and

RETA CARO Exam (100 out of 100) Questions and Answers ( )

RETA CARO Exam (100 out of 100) Questions and

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