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Steam Nozzles and Turbines
The efficiency of steam turbines may be improved by
reheating of steam
regenerative feed heating
binary vapour plant
any one of these
Correct Answer:
any one of these
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Steam Nozzles and Turbines
The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)
The pressure at which the steam leaves the nozzle is known as back pressure.
The difference of supersaturated temperature and saturation temperature at that pressure is called
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
The critical pressure gives the velocity of steam at the throat
The critical pressure ratio for initially wet steam is
Multi-stage steam turbines are of the
The maximum efficiency of a reaction turbine is
The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.
A binary vapour plant consists of
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