Refrigeration Systems Quiz set 3

Under normal conditions, refrigerant enters the compressor of a refrigeration system as a _______.

• low-pressure liquid

• low-pressure vapor

• high-pressure liquid

• high-pressure vapor

Which refrigerant is considered a high-pressure refrigerant?

• R-410A

• R-113

• R-123

• R-11

Which refrigerant is considered a low-pressure refrigerant?

• R-407C

• R-123

• R-134a

• R-404A

__________ make(s) HFO refrigerants less flammable than HC refrigerants.

• Chlorine

• Bromine and phosgene

• Fluorine

• Fractured oxygen (FO)

Which refrigerants is an HFO?

• R-1234yf

• R-123ga(E)

• R-134a

• R-410A

HFC refrigerants contain ______________________.

• Helium, fluoride, and chlorine

• Hydrazine, fluoride, and chlorine

• Helium, fluorine, and carbon

• Hydrogen, fluorine, and carbon

Which refrigerant contains chlorine?

• R-12

• R-1234yf

• R-134a

• none of them

Which refrigerant is an HFC?

• R-134a

• R-600a

• R-1234yf

• R-1234zd

Which of the following statements is true?

• The propane used in grills can be used in chillers.

• Propane cylinders for grilling contains impurities that refrigerant-grade propane does not have.

• Propane cylinders for grilling have the same purity as refrigerant-grade propane.

• Propane is a natural HFO.

Why are flammable HFO refrigerants classified as A2L and not A2?

• Only the liquid is flammable.

• They have low flammability, being less flammable than HC refrigerants.

• They have lingering flammability.

• They have low GWP.