HVAC EPA 608 Refrigerant Certification 3

Question 1

What is the correct color coding for a refrigerant recovery cylinder that has been used and contains refrigerant?

Accepted Answer

Yellow with a gray collar

Answer

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?

Accepted Answer

Type I

Answer

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?

Accepted Answer

95%

Answer

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?

Accepted Answer

Carbon dioxide

Answer

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?

Accepted Answer

To verify refrigerant purity and detect contaminants or cross-contamination

Answer

A refrigerant identifier analyzes the recovered refrigerant to verify its type and detect cross-contamination or contaminants before it is sent to a reclaimer.

HVAC Practice Test

HVAC Practice Test

HVAC EPA 608 Refrigerant Certification 3