Core
What refrigerants contain chlorine and damage the ozone layer the most?
CFC refrigerants
What appliances contain 5 pounds of refrigerant or less?
Type 1 appliances
What appliances use refrigerants with boiling points below 10°F at atmospheric pressure?
High-pressure appliances
What appliances commonly operate below atmospheric pressure?
Type 3 appliances
What penguin species is represented by Sir Nils Olav of Norway’s King’s Guard?
King penguin
What federal agency enforces Section 608 regulations?
EPA
What temporary access fitting is commonly installed on small appliance process tubes?
Piercing valve
What traditional cylinder color is used for R-22 refrigerant?
Light green
What low-pressure refrigerant is commonly used in centrifugal chillers?
R-123
What animal can survive without its head for several weeks?
Cockroach
What is the term for intentionally releasing refrigerant during service or repair?
Venting
What is the required recovery level for a non-operating Type 1 appliance using passive recovery equipment?
4 inches Hg vacuum
What refrigerant commonly replaced R-22 in residential split systems?
R-410A
What device removes air and non-condensables from low-pressure systems?
Purge unit
What is the only mammal naturally capable of true flight?
Bat
What is the ozone depletion rating assigned to refrigerants called?
ODP
What recovery method depends on the appliance compressor operating?
Active recovery
What component maintains evaporator superheat on modern systems?
TXV
What condition is created when air enters a low-pressure chiller through leaks?
Non-condensables
What planet has the shortest day in the solar system?
Jupiter
What international agreement phased out many ozone-depleting refrigerants?
Montreal Protocol
What EPA-required procedure must be completed before disposing of a household refrigerator?
Refrigerant recovery
What is the leak repair threshold for comfort cooling equipment containing over 50 pounds of refrigerant?
10%
What dangerous condition can occur when charging liquid refrigerant too quickly into a low-pressure chiller?
Tube freezing
What animal has fingerprints nearly identical to humans?
Koala