Question 678Steam Plants - Assistant Engineer70% to pass
Which of the steam losses listed would be associated with a multi-stage impulse turbine rather than a multi-stage reaction turbine?
AI Explanation
The correct answer is A) Diaphragm packing loss.
In a multi-stage impulse turbine, the steam flows through a series of stationary nozzles and moving blades. The diaphragms separating the turbine stages have packing seals to minimize steam leakage between stages, which results in diaphragm packing loss. This type of loss is more associated with impulse turbines rather than reaction turbines, where the steam pressure drop occurs primarily across the stationary blades.
The other options, B) Blade and nozzle loss, C) Radiation loss, and D) Leaving loss, are general steam turbine losses that can occur in both impulse and reaction turbine designs.
Related Questions
#676 The purpose of shroud bands secured to the tips of the turbine blades is to _______________.#677 Tenon peening is a technique employed by turbine manufacturers to _______________.#679 Shrouding on impulse turbine blading is held in place by _______________.#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 _______________.