EPA Section 608 Universal Certification ExamType II (High-Pressure Appliances)Easy
Which of the following refrigerants is considered a 'very high-pressure' refrigerant under EPA Section 608 regulations?
- AR-22
- BR-744 (CO2)
- CR-134a
- DR-410A
Show answer & explanationAnswer & explanation
Correct answer: B. R-744 (CO2)
R-744 (CO2) operates at significantly higher pressures than other common refrigerants like R-134a, R-22, and R-410A, classifying it as a 'very high-pressure' refrigerant. R-410A is considered a high-pressure refrigerant, but not 'very high-pressure'.
Why the other options are wrong
- A. R-22 is a high-pressure refrigerant.
- C. R-134a is a high-pressure refrigerant.
- D. R-410A is a high-pressure refrigerant, but not 'very high-pressure'.
Very High-Pressure Refrigerant
A refrigerant that operates at extremely high pressures, often requiring specialized equipment and safety precautions.
- R-744 (CO2) is the primary example of a very high-pressure refrigerant.
- These systems require components designed for much higher pressures.
- Safety protocols for handling R-744 differ due to its high pressure.
Memory trick: Pressure levels climb, from low to very high, what's your refrigerant's vibe?