A recovery cylinder is being filled with recovered R-404A. To leave room for liquid expansion, the cylinder must never be filled beyond what percent of its capacity?
a.95 percent
b.60 percent
c.50 percent
d.80 percent
Explanation
Refrigerant recovery cylinders must never be filled beyond 80 percent of capacity by weight, leaving vapor space so the liquid can expand safely as temperature rises. Overfilling can cause the cylinder to become hydrostatically full and rupture. Filling to 95 percent is dangerous, while 50 or 60 percent is unnecessarily conservative and not the rule.
This topic, taught in full in the EPA Section 608 Certification guide. EPA 608 Universal Study Guide (2026) — Core + Type I/II/III, with the 2027 A2L update — PDF + EPUB, $14.99 · 14-day refund →
Practice all 240 questions free — no signup required.
Own the complete EPA Section 608 Certification guide — PDF + EPUB, $14.99 →
Related questions on this topic
- What is 'system-dependent' (passive) recovery?
- The EPA program that reviews and lists acceptable substitute refrigerants for specific end uses is called:
- A wholesaler offers a technician a low-GWP refrigerant such as R-1234yf. This refrigerant is an example of:
- Cylinders used to store recovered refrigerant must be approved by which agency for transportation?
- A technician needs to identify a cylinder by its color. Which color has EPA and industry designated for refrigerant recovery cylinders?
- A technician pulls a light-green cylinder from the truck. Under the traditional color code, which refrigerant does light green identify?
Last reviewed: · editorial process
PrepPass team · Verified against EPA Section 608 Technician Certification Exam · How we review