Which refrigerant example is commonly classified as an A3 refrigerant?

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Prepare for the FDNY COF Flammable-Refrigerant Refrigeration Systems Exam. Use flashcards and multiple choice questions with explanations. Ace your test!

Multiple Choice

Which refrigerant example is commonly classified as an A3 refrigerant?

Explanation:
Understanding refrigerant safety classifications helps here: A denotes low toxicity, and the number shows flammability, with 3 being highly flammable. Propane (R-290) has relatively low toxicity but is highly flammable, so it fits the A3 category. Ammonia is toxic, so it isn’t classified as A3 even though its flammability isn’t the primary issue; carbon dioxide and R-134a are non-flammable with low toxicity, placing them in A1. So propane is the example that matches A3.

Understanding refrigerant safety classifications helps here: A denotes low toxicity, and the number shows flammability, with 3 being highly flammable. Propane (R-290) has relatively low toxicity but is highly flammable, so it fits the A3 category. Ammonia is toxic, so it isn’t classified as A3 even though its flammability isn’t the primary issue; carbon dioxide and R-134a are non-flammable with low toxicity, placing them in A1. So propane is the example that matches A3.

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