The overall efficiency of a steam power station is ________ its thermal efficiency.
Correct answer: A. less than
- A. less than
- B. equal to
- C. greater than
- D. none of the above
Explanation
Overall efficiency equals thermal efficiency multiplied by the efficiencies of the boiler, turbine, generator, and other auxiliaries. Since these additional stages have efficiencies below unity, overall efficiency is less than thermal efficiency.
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