Chill with Confidence: Ace the 2025 ASE Air Conditioner Exam and Keep Cool Under the Hood!

Question: 1 / 400

Which of the following is NOT a classification of antifreeze?

Inorganic Additive Technology (IAT)

Organic Additive Technology (OAT)

Hybrid Inorganic Additive Technology (HIAT)

Hybrid Inorganic Additive Technology (HIAT) is not recognized as a standard classification of antifreeze. The classifications you find in the market typically include Inorganic Additive Technology (IAT), which is known for its effectiveness with older vehicle models and is typically based on silicates; Organic Additive Technology (OAT), which is designed for newer models and utilizes organic acids to prevent corrosion; and Hybrid Organic Additive Technology (HOAT), which is a blend of IAT and OAT benefits.

The distinction for antifreeze classifications is crucial for ensuring the correct type is used in a vehicle’s cooling system, as using the wrong type can lead to reduced protection against corrosion, overheating issues, and potential damage to the engine. Thus, recognizing that HIAT is not a commonly accepted category for antifreeze helps clarify the classifications that you would typically encounter in automotive practices.

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Hybrid Organic Additive Technology (HOAT)

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