DOL 8/14-8/15

How do the global warming potentials of isobutane (R-600a), propane (R-290), and R-441A compare to the GWPs of HFC-134a, R-404A, and R-410A?

• They are significantly higher.

• They are significantly lower.

• They are approximately equal.

• They are just slightly higher.

What characteristic of HFC refrigerants make them damaging to the environment?

• They are toxic to plants and animals at low doses.

• They contain chlorine which damages the ozone layer.

• They have a high Ozone Depletion Potential (ODP).

• They can have very high global warming potentials.

What is the state of the refrigerant entering the compressor of a refrigeration system?

• Low pressure liquid

• Low pressure vapor

• High pressure liquid

• High pressure vapor

Which of the following is an HFC refrigerant?

• R-134a

• R-115

• R-22

• R-11

Why are some hydrofluoroolefin (HFO) refrigerants classified as “A2L”?

• They have toxicity characteristics.

• They are less flammable than hydrocarbon refrigerants, but most are still mildly flammable.

• They are prohibited for use in the U.S.

• They have high ozone depleting potentials and low global warming potentials.

Which type of refrigerant is the most harmful to stratospheric ozone?

• CFCs

• HCFCs

• HFCs

• HFOs

What is the name of EPA’s program that identifies refrigerants with lower overall risks to human health and the environment?

• The Significant New Alternatives Policy (SNAP) Program

• The GreenChill Program

• The Approved ASHRAE List (AAL)

• Energy Star