HVAC EPA 608 Refrigerant Certification 3 — Questions and Answers
Question 1: What is the correct color coding for a refrigerant recovery cylinder that has been used and contains refrigerant?
- Green
- Yellow with a gray collar (Correct answer)
- White
- Blue
Correct answer: Yellow with a gray collar
Used refrigerant recovery cylinders are identified by a yellow body with a gray collar, distinguishing them from new refrigerant cylinders which use manufacturer colors.
Question 2: Which EPA 608 certification type covers small appliances such as household refrigerators and window air conditioners?
- Type I (Correct answer)
- Type II
- Type III
- Universal
Correct answer: Type I
Type I certification covers small appliances containing five pounds or less of refrigerant, including household refrigerators and window AC units.
Question 3: When recovering refrigerant from a system with a hermetically sealed compressor that is NOT operational, what recovery efficiency must be achieved for systems containing less than 200 lbs of refrigerant manufactured after November 15, 1993?
- 80%
- 90%
- 95% (Correct answer)
- 4 inches of mercury vacuum
Correct answer: 95%
For systems manufactured after November 15, 1993, with non-operational compressors and less than 200 lbs refrigerant, 90% recovery efficiency or 4 inches Hg vacuum is required.
Question 4: R-744 is the refrigerant designation for which substance?
- Ammonia
- Carbon dioxide (Correct answer)
- Propane
- Water
Correct answer: Carbon dioxide
R-744 is the ASHRAE designation for carbon dioxide (CO2), which is increasingly used as a natural refrigerant in transcritical refrigeration systems.
Question 5: What is the purpose of a refrigerant identifier (analyzer) before recovery?
- To measure the system's superheat
- To verify refrigerant purity and detect contaminants or cross-contamination (Correct answer)
- To check the oil level in the compressor
- To test for non-condensables only
Correct answer: To verify refrigerant purity and detect contaminants or cross-contamination
A refrigerant identifier analyzes the recovered refrigerant to verify its type and detect cross-contamination or contaminants before it is sent to a reclaimer.
Question 6: Which of the following refrigerants is considered a 'natural' refrigerant?
- R-404A
- R-410A
- R-717 (Correct answer)
- R-134a
Correct answer: R-717
R-717 is ammonia, a natural refrigerant with zero ODP and zero GWP, widely used in industrial refrigeration systems.
Question 7: Under EPA Section 608, which entity is responsible for certifying refrigerant reclaimers?
- ASHRAE
- The EPA itself (Correct answer)
- ARI (AHRI)
- The Department of Transportation
Correct answer: The EPA itself
The EPA certifies refrigerant reclaimers under Section 608 and maintains a list of approved reclaimers who must meet ARI Standard 700 purity requirements.
HVAC EPA 608 Refrigerant Certification 3
What is the correct color coding for a refrigerant recovery cylinder that has been used and contains refrigerant?