Question 596Steam Plants - Assistant Engineer

The correct answer is A) Securing the blade tips with shrouding. Impulse turbine blading is more susceptible to vibration compared to reaction turbine blading. To compensate for this increased vibration risk, the blade tips are typically secured with shrouding. The shrouding helps stabilize the blades and reduces the likelihood of harmful vibrations occurring. The other answer choices are incorrect because: B) the decreased pressure drop is not a vibration mitigation technique, C) seal stripping the casing does not address blade vibration, and D) tuned vibration dampers, while useful, are not the primary method for addressing vibration in impulse turbine blades.