🔍 Key Concepts
• Difference between impulse and reaction turbine stages
• Where the pressure drop occurs in impulse vs. reaction designs (nozzles vs. moving blades)
• How velocity-compounding and diaphragms/nozzles relate to impulse stages
💭 Think About
• For an impulse-reaction turbine, should the flow see only impulse stages, only reaction stages, or a mix of both? Think about what the name implies.
• Ask yourself: in impulse stages, where is most of the pressure drop, and in reaction stages, where is it shared? How would they logically be arranged in one machine?
• Look at each choice and decide: is this describing mainly impulse behavior, mainly reaction behavior, or a combination, and in what order?
✅ Before You Answer
• For each option, identify clearly: where does the pressure mainly drop (stationary nozzles, diaphragms, or moving blades)?
• Check which option truly combines both impulse and reaction principles in one turbine, not just one or the other.
• Verify which terms like velocity-compounded, nozzles, and diaphragms are usually associated with impulse stages.