Plumbing & HVAC 608 2nd Set

During servicing of any refrigeration system, the refrigerant must be _________.

• reclaimed

• recovered

• recycled

• all of the above

Which refrigerant(s) must be recovered ________________.

• all HFCs except R1324a

• CFCs and HCFCs but not HFCs

• only HCFCs and HFOs

• all non-exempt refrigerants

Which of the following is illegal?

• Using any CFC refrigerant

• Importing HFO refrigerants into the U.S.

• Knowingly releasing refrigerants during the service, maintenance, repair, or disposal of appliances

• Selling recovered R-22 to any U.S. based reclaimer

The release of any CFC, HCFC, or HFC refrigerant during _____________ is illegal.

• the installation of manifold gauges equipped with low-loss fittings

• theft of equipment

• the connection of a recovery machine equipped with low-loss fittings

• all of the above

Why is venting an "exempt refrigerant" legal?

• Because the EPA has determined that the refrigerant does not pose a threat to the environment if released

• Because EPA has not yet made it illegal to vent that particular refrigerant

• Because the refrigerant is not yet SNAP approved

• Because the environmental analysis is not yet complete

Which refrigerant release is allowable by the EPA because the refrigerant is "exempt."

• Releasing R-410A from pre-2000 household refrigerators

• Releasing less than 5 pounds of mixed refrigerant from a recovery cylinder

• Releasing isobutane from a household freezer

• Releasing R-22 from appliances with a charge less than 1 pound

Which action is a violation of the prohibition on venting refrigerants?

• Release of "de minimis" quantities in the course of making good faith attempts to recover refrigerant

• Adding nitrogen to a fully charged appliance to leak check the appliance and then venting the mixture

• Refrigerant that leaks when the system is operating

• Refrigerant that leaks when connecting low-loss hoses

Which of the following refrigerants has the lowest global warming potential?

• R-123

• R-134A

• R-404A

• R-600a

What gas is used as the baseline measurement for GWP?

• Carbon monoxide

• Carbon dioxide

• Ethane

• Propane

Which type of refrigerant typically has the lowest global warming potential?

• CFCs

• HFOs

• HCFCs

• All are equal