In a turbine blade assembly, shrouding influences steam flow by which of the following?

• A. Increase cooling of blade tips
• B. Redirect steam flow to next stage
• C. Confine steam to the blades
• D. Reduce turbine vibrations by damping

Answer: (C)

Shrouding around the blade tips acts like a barrier at the tip clearance, preventing steam from leaking across the tips into the casing. By keeping the steam confined to the blade passages, most of the energy is extracted as the steam flows along the blade surfaces, which is the primary effect on the flow. While a shroud can also contribute to vibration control by stiffening the tip region, its main influence on steam flow is confinement to the blades rather than redirecting flow or increasing tip cooling.