🔍 Key Concepts

• how exhaust gas energy drives a turbocharger turbine • relationship between engine RPM and turbocharger RPM • what changes immediately vs. indirectly when engine load varies

💭 Think About

• Which of these options changes the flow and energy of the exhaust gas that actually spins the turbo’s turbine wheel? • Does the turbo respond first and most directly to how fast the engine is turning, or to how hard the engine is working under that speed? • Which choice represents the primary mechanical driver of the turbo, rather than a condition that results from turbo operation?

✅ Before You Answer

• Identify what physically turns the turbocharger turbine and what that motion is connected to mechanically. • Distinguish between a cause (what makes the turbo speed up) and effects (what changes because the turbo is already spinning faster). • Check which option is most directly linked to exhaust gas volume and frequency entering the turbine housing.