EPA Section 608 Universal Certification ExamType II (High-Pressure Appliances)Easy
A recovery cylinder containing R-22 is being transported. What is the maximum percentage of the cylinder's gross weight that can be composed of recovered refrigerant to prevent overfilling?
- A80%
- B90%
- C60%
- D70%
Show answer & explanationAnswer & explanation
Correct answer: A. 80%
To prevent overfilling and ensure safety during transport, recovery cylinders should not be filled beyond 80% of their net weight capacity, or 80% of their gross weight capacity if weighing by gross weight.
Why the other options are wrong
- B. 90% is too high and would create a dangerous overfill condition.
- C. 60% is too low; it's not the maximum fill level.
- D. 70% is too low; it's not the maximum fill level.
Recovery Cylinder Fill Limit
DOT regulations and good practice dictate that recovery cylinders must not be filled beyond 80% of their capacity by weight to prevent dangerous overpressurization, especially during temperature changes.
- Prevents hydrostatic rupture due to liquid expansion.
- Measured by weight, not volume.
- Applies to all types of recovered refrigerants.
Memory trick: Eighty percent is the safe weight, avoid a burst, seal your fate.