A technician pulls a light-green cylinder from the truck. Under the traditional color code, which refrigerant does light green identify?
a.R-22
b.R-134a
c.R-404A
d.R-410A
Explanation
Under the traditional refrigerant color code, light green identifies R-22, while R-410A is rose (pink), R-134a is light blue, and R-404A is orange. Color codes help technicians grab the right cylinder, but the printed label must always be verified because colors can fade or be reused. Never rely on color alone to identify a refrigerant.
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
- 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?
- 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?
- Under the traditional color code, which refrigerant cylinder is rose (pink)?
- A commercial supermarket rack system contains more than 50 pounds of refrigerant and develops a leak. Once the owner exceeds the applicable annual leak rate, the leak generally must be repaired within:
- Under the Section 608 leak repair rules (40 CFR §82.157), the leak rate thresholds apply to appliances that normally contain how much refrigerant?
Last reviewed: · editorial process
PrepPass team · Verified against EPA Section 608 Technician Certification Exam · How we review