If cooling air passes over intake air then this is a/an?

If cooling air passes over intake air then this is a/an?

• A. Water-to-air aftercooler
• B. Intercooler
• C. Gas-to-air cooler
• D. Air-to-Air aftercooler

Answer: (D)

When compressed air is cooled after leaving the compressor, that cooling is called aftercooling. If the cooling medium is air, it’s an air-to-air aftercooler. In this scenario, the cooling air flows over the hot intake air as it goes toward the engine, removing heat with ambient air—that's exactly air-to-air aftercooling. An intercooler, by contrast, sits between stages of compression to cool air before the next compression step, not at the engine intake. A water-to-air aftercooler would use water as the cooling medium, not air. A gas-to-air cooler isn’t a standard term for this setup.

When compressed air is cooled after leaving the compressor, that cooling is called aftercooling. If the cooling medium is air, it’s an air-to-air aftercooler. In this scenario, the cooling air flows over the hot intake air as it goes toward the engine, removing heat with ambient air—that's exactly air-to-air aftercooling. An intercooler, by contrast, sits between stages of compression to cool air before the next compression step, not at the engine intake. A water-to-air aftercooler would use water as the cooling medium, not air. A gas-to-air cooler isn’t a standard term for this setup.