🔍 Key Concepts

• turbocharger operation and how it affects air temperature • relationship between air temperature, volume, and density for a gas • purpose of an aftercooler/intercooler in an engine air system

💭 Think About

• When a turbocharger compresses air, what happens to the air’s temperature and volume? How does that affect the amount of oxygen entering the cylinders? • Think about which engine process (intake, compression, power, exhaust) would benefit most from an aftercooler located between the turbocharger and intake manifold. • Which option describes a direct result of cooling compressed air, rather than a side effect or something happening on the exhaust side?

✅ Before You Answer

• Verify which choice directly describes what happens to air properties (not engine components) when you cool compressed intake air. • Check whether any option incorrectly relates the aftercooler to exhaust conditions instead of intake conditions. • Confirm that the correct choice describes a primary function, not a secondary or indirect benefit.