EPA 608 609 Refrigerant Properties and Identification

Question 1

What is the ASHRAE/ARI standard cylinder color for R-22 refrigerant?

Accepted Answer

Green

Answer

ASHRAE/ARI assigns green as the standard cylinder color for R-22 to prevent misidentification during service.

Question 2

Which refrigerant is classified as a hydrofluorocarbon (HFC)?

Accepted Answer

R-134a

Answer

R-134a is an HFC (tetrafluoroethane) containing only hydrogen, fluorine, and carbon — no chlorine — giving it zero ozone depletion potential.

Question 3

What does the term 'azeotropic blend' mean when referring to refrigerants?

Accepted Answer

A mixture that behaves like a single refrigerant with a constant boiling point

Answer

An azeotropic blend maintains its composition during phase changes and boils at a constant temperature, behaving like a single-component refrigerant.

Question 4

Which of the following is a chlorofluorocarbon (CFC) refrigerant?

Accepted Answer

R-12

Answer

R-12 (dichlorodifluoromethane) is a CFC containing only chlorine and fluorine with no hydrogen, making it highly ozone-depleting and fully phased out.

Question 5

What substance serves as the reference standard (GWP = 1) for Global Warming Potential calculations?

Accepted Answer

Carbon dioxide (CO2)

Answer

CO2 has a defined GWP of 1 and serves as the baseline against which all other greenhouse gases are measured over a 100-year horizon.

EPA 608 609 Practice Test

EPA 608 609 Practice Test

EPA 608 609 Refrigerant Properties and Identification