EPA 608 609 Refrigerant Properties and Identification 2

Question 1

What is the ASHRAE/ARI standard cylinder color for R-410A refrigerant?

Accepted Answer

Rose (pink)

Answer

ASHRAE/ARI assigns rose (pink) as the standard cylinder color for R-410A to distinguish it from other refrigerants during service.

Question 2

Which refrigerant is classified as an HCFC (hydrochlorofluorocarbon)?

Accepted Answer

R-22

Answer

R-22 is an HCFC (chlorodifluoromethane) because it contains hydrogen, chlorine, and fluorine; its chlorine content gives it an ODP of 0.055.

Question 3

What does a refrigerant's 'critical temperature' refer to?

Accepted Answer

The temperature above which it cannot be liquefied regardless of pressure

Answer

The critical temperature is the point above which a refrigerant exists only as a gas and cannot be liquefied by increasing pressure, defining the upper bound of the two-phase region.

Question 4

Which of the following refrigerants has the highest ozone depletion potential (ODP)?

Accepted Answer

R-12

Answer

R-12, a CFC, has an ODP of 1.0 — the reference value — which is higher than R-22's ODP of 0.055; HFCs like R-134a and R-410A have zero ODP.

Question 5

What ASHRAE/ARI color code identifies R-404A refrigerant cylinders?

Accepted Answer

Orange

Answer

ASHRAE/ARI assigns orange as the standard cylinder color for R-404A, the HFC blend widely used in commercial refrigeration as an R-502 replacement.

EPA 608 609 Practice Test

EPA 608 609 Practice Test

EPA 608 609 Refrigerant Properties and Identification 2