Steam Boilers, Engines, Nozzles and Turbines In a nozzle, the effect of super-saturation is to Increase the entropy Increase the heat drop Decrease specific volume of steam Decrease dryness fraction of steam Increase the entropy Increase the heat drop Decrease specific volume of steam Decrease dryness fraction of steam ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The evaporation of 15.653 kg of water per hour from and at 100°C is called Equivalent evaporation Evaporative capacity One boiler h.p. Factor of evaporation Equivalent evaporation Evaporative capacity One boiler h.p. Factor of evaporation ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The pressure of reheat steam after passing through reheater compared to inlet condition is More May be more or less depending on capacity of reheater Equal Less More May be more or less depending on capacity of reheater Equal Less ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In designing air preheaters, the important design consideration is that Approach temperature should be as low as possible Heat transfer area should be optimum Handling and maintenance should be easier Stack gases should not be cooled to the dew point Approach temperature should be as low as possible Heat transfer area should be optimum Handling and maintenance should be easier Stack gases should not be cooled to the dew point ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines While steam expands in turbines, theoretically the entropy Decreases Remains constant Behaves unpredictably Increases Decreases Remains constant Behaves unpredictably Increases ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the Blade solidity is 0.65 Blade velocity coefficient is unity Blades are equiangular and frictionless Blades are equiangular Blade solidity is 0.65 Blade velocity coefficient is unity Blades are equiangular and frictionless Blades are equiangular ANSWER DOWNLOAD EXAMIANS APP
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