Understanding Refrigerants and Regulations

What is a zeotropic refrigerant mixture?

• A mixture of components with the same boiling point.

• A mixture of components with different boiling points.

• A single-component refrigerant.

• A refrigerant that does not experience temperature glide.

What is the proper charging method for R-400 series blended refrigerants?

• Charge as a gas into the low side of the system.

• Weigh the refrigerant into the high side of the system as a liquid.

• Charge as a liquid into the low side of the system.

• Charge as a gas into the high side of the system.

Which refrigerant is known for having a high-temperature glide and may easily experience fractionation?

• R-22

• R-134a

• R-407C

• R-410A

What type of oil is most commonly used when retrofitting HCFC equipment to HFC refrigerants?

• Mineral oil

• Alkylbenzene oil

• Polyolester oil

• PAG oil

Which of the following refrigerants is classified as a very high-pressure refrigerant at 104°F?

• HFC-134a

• HCFC-22

• CO2 (R-744)

• HFC-410A

What is the purpose of the EPA's Significant New Alternatives Policy (SNAP) Program?

• To phase out all refrigerants by 2030.

• To identify refrigerants with lower overall risks to human health and the environment.

• To approve direct drop-in replacements for R-22.

• To regulate the sale of all refrigerants.

What must be done before retrofitting an HCFC system to use HFC refrigerant?

• Mix ester-based oil with existing oil.

• Remove other types of oils before adding ester-based oil.

• Add more HCFC refrigerant.

• Replace all copper tubing.

Which refrigerant is exempt from the venting prohibition under EPA regulations?

• R-22

• HFC-134a

• Ammonia

• R-410A

What is the penalty for knowingly releasing non-exempt refrigerant from appliances as of 2017?

• $10,000 per day, per violation

• $20,000 per day, per violation

• $44,539 per day, per violation

• $50,000 per day, per violation

What must be done with disposable cylinders of CFCs, HCFCs, HFCs, or HFOs before discarding?

• Leave them as is.

• Recover all remaining refrigerant and recycle the metal.

• Fill them with water.

• Store them indefinitely.