313A Refrigerants & Environmental Regulations

Question 1

Under the Canadian Environmental Protection Act (CEPA), which federal regulation specifically controls ozone-depleting substances (ODS) in Canada?

Accepted Answer

The Ozone-depleting Substances and Halocarbon Alternatives Regulations (ODSHAR)

Answer

The Ozone-depleting Substances and Halocarbon Alternatives Regulations (ODSHAR) under CEPA govern the use, import, export, and disposal of ODS and their alternatives in Canada.

Question 2

What is the ozone depletion potential (ODP) of R-22 (HCFC-22)?

Accepted Answer

0.034

Answer

R-22 has an ODP of 0.034 relative to R-11 (ODP=1.0), meaning it depletes the ozone layer but significantly less than the fully halogenated CFCs it replaced.

Question 3

Under the Montreal Protocol, which class of refrigerants was phased out first due to the highest ozone depletion potential?

Accepted Answer

CFCs (chlorofluorocarbons)

Answer

CFCs, such as R-11 and R-12, were phased out first under the Montreal Protocol because their high chlorine content and atmospheric stability give them the greatest ozone depletion potential.

Question 4

What refrigerant has completely replaced R-22 in new Canadian residential air conditioning equipment?

Accepted Answer

R-410A

Answer

R-410A became the primary replacement for R-22 in new residential and light commercial air conditioning systems in Canada due to its zero ODP, though it has a high GWP and is now being phased down.

Question 5

What does GWP (Global Warming Potential) measure for refrigerants?

Accepted Answer

The relative contribution of the refrigerant to greenhouse warming compared to CO2 over 100 years

Answer

GWP is an index that compares a refrigerant's contribution to climate change relative to carbon dioxide (CO2=1) over a 100-year time horizon.

Red Seal HVAC 313A Practice Test

Red Seal HVAC 313A Practice Test

313A Refrigerants & Environmental Regulations