BRAINSCAPE1
RETA CARO Exam with complete
solutions latest version
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
A cartridge type gas mask may legally be used for personal protection when -
CORRECT ANSWER-the type of the hazard is known and the concentration is known
BRAINSCAPE1
RETA CARO Exam with complete
solutions latest version
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
A cartridge type gas mask may legally be used for personal protection when -
CORRECT ANSWER-the type of the hazard is known and the concentration is known
BRAINSCAPE1
