Question 564Steam Plants - Assistant Engineer
70% to passA pressure-velocity compounded impulse turbine consists of _______________.
Aseveral rows of moving blades attached to diaphragms
Bvelocity compounding with reaction pressure compounding
Ctwo or more rows of nozzles in which no pressure drop exists
Dtwo or more stages of velocity compounding
AI Explanation
The correct answer is D) two or more stages of velocity compounding. A pressure-velocity compounded impulse turbine consists of two or more stages of velocity compounding, where the steam is expanded through a series of nozzles and blades. This allows the steam to undergo both velocity compounding and pressure compounding, making it more efficient than a simple impulse turbine. The other options are incorrect because: A) a pressure-velocity compounded turbine does not have diaphragms, B) it involves both velocity compounding and pressure compounding, not just velocity compounding with reaction pressure compounding, and C) it has multiple stages of nozzles, not just a single row with no pressure drop.
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