A2L Practice Solution Test Questions with Correct Answers (Grade
A+)
Question 1: What is a potential health consequence of inhaling hydrogen fluoride combustion
by-products from A2L refrigerants?
Answer: Pulmonary Edema
Question 2: When did the phase-down of R-410A begin?
Answer: 2022
Question 3: When will the EPA prohibit the production of new equipment using R-410A?
Answer: 2025
Question 4: What does the classification 'A2L' stand for?
Answer: Non-toxic, Flammable, Low Burning Velocity
Question 5: Which item is NOT required on the UL-mandated label for flammable refrigerant
systems?
Answer: Name of the manufacturer
Question 6: What information must be included on the UL-mandated label for flammable refrigerant
systems?
Answer: Evacuation level achieved, pressure used for leak testing, and
the date the test and evacuation were completed
Question 7: Why should standard recovery machines for HFC/CFC refrigerants not be used with HC
refrigerants?
Answer: They contain ignition sources like on-off switches, relays, and
pressure switches
Question 8: What is a required safety feature for indoor A2L refrigerant systems?
Answer: A leak detection system
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A+)
Question 1: What is a potential health consequence of inhaling hydrogen fluoride combustion
by-products from A2L refrigerants?
Answer: Pulmonary Edema
Question 2: When did the phase-down of R-410A begin?
Answer: 2022
Question 3: When will the EPA prohibit the production of new equipment using R-410A?
Answer: 2025
Question 4: What does the classification 'A2L' stand for?
Answer: Non-toxic, Flammable, Low Burning Velocity
Question 5: Which item is NOT required on the UL-mandated label for flammable refrigerant
systems?
Answer: Name of the manufacturer
Question 6: What information must be included on the UL-mandated label for flammable refrigerant
systems?
Answer: Evacuation level achieved, pressure used for leak testing, and
the date the test and evacuation were completed
Question 7: Why should standard recovery machines for HFC/CFC refrigerants not be used with HC
refrigerants?
Answer: They contain ignition sources like on-off switches, relays, and
pressure switches
Question 8: What is a required safety feature for indoor A2L refrigerant systems?
Answer: A leak detection system
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