HVAC EPA 608 Refrigerant Certification 5

Question 1

Which refrigerant blend is an azeotrope, meaning it behaves like a single-component refrigerant with no temperature glide?

Accepted Answer

R-410A

Answer

R-410A is a near-azeotropic blend of R-32 and R-125 with minimal temperature glide (less than 0.1°F), behaving essentially like a single-component refrigerant.

Question 2

What does the AIM Act (American Innovation and Manufacturing Act) primarily authorize the EPA to do?

Accepted Answer

Phase down the production and consumption of HFCs in the United States

Answer

The AIM Act authorizes the EPA to phase down U.S. production and consumption of HFCs by 85% from baseline levels by 2036.

Question 3

A technician is working on a centrifugal chiller using R-11. Which EPA 608 certification type is required?

Accepted Answer

Type II

Answer

Type II certification covers high-pressure and very high-pressure appliances, but centrifugal chillers using R-11 operate at low pressure, requiring Type III certification.

Question 4

What condition is indicated when the suction line of an air conditioning system is heavily frosted all the way back to the compressor?

Accepted Answer

Flooded evaporator with liquid returning to the compressor

Answer

Frost extending back to the compressor indicates liquid refrigerant is returning (flooding back), which can cause liquid slugging and compressor damage.

Question 5

Under EPA 608, what must be included on the label of a refrigerant recovery cylinder?

Accepted Answer

Refrigerant type, whether it is mixed with other refrigerants, and whether it contains contaminants

Answer

Recovery cylinder labels must identify the refrigerant type, disclose if it has been mixed with other refrigerants, and indicate whether it contains contaminants.

HVAC Practice Test

HVAC Practice Test

HVAC EPA 608 Refrigerant Certification 5