What is a device that functions like a pressure-reducing valve?
A. Multistage steam turbine
B. Single-stage steam turbine
C. Condensing steam turbine
D. Noncondensing steam turbine
A. Incorrect. A multistage turbine is a device that contains multiple sets of blades, or stages.
B. Incorrect. A single-stage turbine is a device that contains a set of moving blades, called a stage.
C. Incorrect. A condensing steam turbine is a device in which exhaust steam is condensed in a surface condenser, and the condensate is then recycled to the boiler.
D. Correct. A noncondensing steam turbine, also called a back-pressure turbine, is a device that functions like a pressure-reducing valve.
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