21. In accelerated circulation type boiler
22. In forced circulation type boiler
23. The critical pressure ratio for initially dry saturated steam is
24. Heating of dry steam above saturation temperature is known as
25. The chimney draught varies with
26. De-Laval turbine is a
27. The efficiency of steam turbines may be improved by
28. Incomplete combustion can be best judged by
29. Green coal, in order to be burnt, must be
30. The ratio of the workdone on the blades to the energy supplied to the blades, is called
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