🔍 Key Concepts

• Difference between impulse and reaction turbine stages • Where pressure drop occurs in each type of turbine • Which losses are generic to all turbines vs. specific to stage construction

💭 Think About

• First, recall how steam flows through an impulse stage versus a reaction stage. Where does the main pressure drop happen in each? • Think about which option names a loss that depends on having separate nozzles and diaphragms between stages, as used in impulse designs. • Ask yourself: which listed loss could be uniquely tied to the way steam is directed between moving wheels in a multistage impulse turbine?

✅ Before You Answer

• Identify which losses (radiation, leaving, blade/nozzle) can occur in any steam turbine regardless of type. • Focus on the term that implies sealing between stationary and rotating parts in multistage impulse construction. • Before choosing, verify which component is especially typical of impulse staging and not a defining feature of reaction staging.