Steam turbine action: classify the nature of steam action Identify whether the action of steam in a steam turbine is static, dynamic, both, or neither. Choose the correct option.

Concept
Steam turbines convert the kinetic energy of high-velocity steam jets into mechanical work on the rotor blades. This momentum exchange is a dynamic action.

Note
Nozzles (often stationary) expand steam (a thermodynamic/static effect) to produce high-velocity jets; the turbine stage itself extracts work dynamically from the jet.

Final Answer
Dynamic