RETA CARO TEST BANK QUESTIONS
AND ANSWERS 2026 | Practice Test |
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
AND ANSWERS 2026 | Practice Test |
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
