- A70% of capacity
- 80% of capacity
- C90% of capacity
- D100% of capacity
Correct answer
80% of capacity
Why
Recovery cylinders should never be filled more than 80% of capacity to allow for thermal expansion of liquid refrigerant.
The concept behind this question
Once refrigerant is in a cylinder and leaving the site, it is a hazardous material shipment and Department of Transportation rules apply on top of EPA's. Recovered refrigerant goes in a DOT-approved recovery cylinder — grey body with a yellow top — never in a disposable cylinder the refrigerant did not come in. Cylinders must be labelled with their contents, kept within the 80% fill limit, and accompanied by shipping papers. Mixing different refrigerants in one cylinder makes the contents unreclaimable and turns a recoverable asset into disposal cost.
More questions on this topic
Exam-style practice question. Not an official EPA exam question.