RETA CARO Test | 27 Questions with
100% Correct Answers | Verified|
Graded A+
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
100% Correct Answers | Verified|
Graded A+
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
