Understanding Ozone Depletion and Refrigerants

What is the primary function of the stratospheric ozone layer?

• To absorb infrared radiation

• To protect the Earth from ultraviolet radiation

• To trap greenhouse gases

• To regulate atmospheric pressure

Which element in CFCs and HCFCs is responsible for ozone depletion?

• Hydrogen

• Fluorine

• Chlorine

• Carbon

What is the Ozone Depletion Potential (ODP) of CFC refrigerants?

• Zero

• Between zero and one

• One or higher

• Negative

Which type of refrigerant has the lowest Global Warming Potential (GWP)?

• CFCs

• HCFCs

• HFCs

• Hydrocarbons (HCs)

What is the main environmental concern associated with HFC refrigerants?

• High ozone depletion potential

• High global warming potential

• High flammability

• High toxicity

Which refrigerant is an example of a Hydrofluoroolefin (HFO)?

• R-134a

• R-410A

• R-1234yf

• R-600a

What is the primary reason why chlorine from CFCs and HCFCs does not rain out of the atmosphere?

• It is too heavy

• It dissolves in water

• It does not dissolve in water

• It reacts with oxygen

Which refrigerant type is classified as having no ozone depletion potential and very low global warming potential?

• CFCs

• HCFCs

• HFCs

• HFOs

What is the classification of refrigerants based on their flammability according to ASHRAE?

• Class A and B

• Levels 1, 2, and 3

• Types X, Y, and Z

• Groups I, II, and III

Which of the following is a medium-pressure refrigerant at a liquid-phase temperature of 104°F?

• CFC-11

• HCFC-22

• HFC-134a

• HFO-1233zd