CORRECT ANSWERS|LATEST !!!!2026|GRADED
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%
1
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%
1
