Question 679Steam Plants - Assistant Engineer70% to pass
Shrouding on impulse turbine blading is held in place by _______________.
AI Explanation
The correct answer is A) peening the tenons.
Impulse turbine blades are held in place by peening the tenons, which are the projections at the base of the blades that fit into the rotor disc. Peening refers to the process of hammering or rolling the metal to deform it and lock the tenons in place. This is a common method used to secure turbine blades and prevent them from becoming dislodged during operation.
The other answer choices are incorrect because: B) circumferential dovetails are used to secure reaction turbine blades, not impulse turbine blades; C) seal welding is not a typical method for securing impulse turbine blades; and D) locking keys are not commonly used to hold impulse turbine blades in place.
Related Questions
#677 Tenon peening is a technique employed by turbine manufacturers to _______________.#678 Which of the steam losses listed would be associated with a multi-stage impulse turbine rather than a multi-stage reaction turbine? #680 While a vessel is underway the low-pressure turbine high-speed pinion is damaged. The pinion is then removed from the gear train. Under these circumstances, the main unit is capable of which speed and direction? #681 Because of the pressure drop existing across each diaphragm, the flow of steam between the nozzle diaphragm and the rotor of the turbine is held to a minimum by _______________.#682 Nozzle diaphragms are installed in pressure-compounded impulse turbines to _______________.