🔍 Key Concepts

• Relationship between turbocharger speed and the amount of exhaust gas energy available • How a constant-speed generator engine behaves when electrical load changes • What actually changes in the engine when kilowatt load increases or decreases

💭 Think About

• When the generator electrical load goes up, what does the engine governor do to keep RPM constant, and how does that affect exhaust flow to the turbocharger? • Which of the options would most directly change the energy in the exhaust gases driving the turbine side of the turbocharger? • In a constant-speed application, does the turbocharger speed track engine RPM only, or does it respond to how hard the engine is working at that RPM?

✅ Before You Answer

• Identify which choice most directly affects exhaust gas volume and temperature at constant engine RPM • Eliminate options that are more of a design setting (fixed or nearly fixed) rather than something that varies with load in normal operation • Confirm that your chosen factor would change whenever the generator’s electrical output (kW) changes, even though engine RPM stays the same