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The ratio of total useful heat drop to the total isentropic heat drop, is called

A. Stage efficiency

B. Internal efficiency

C. Rankine efficiency

D. None of these

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  20. Blading efficiency is also known as
  21. Which of the following statement is correct?
  22. The number of flue tubes in Lancashire boiler is
  23. For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has
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  25. The clearance in the engine cylinder
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  28. The actual vacuum in a condenser is equal to
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