Steam Boilers, Engines, Nozzles and Turbines During polytropic process All of these Heat transfer takes place across cylinder walls Steam may be wet, dry or superheated after expansion Work is done All of these Heat transfer takes place across cylinder walls Steam may be wet, dry or superheated after expansion Work is done ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by None of these (h + hf1)/2257 (h × hf1)/2257 (h - hf1)/2257 None of these (h + hf1)/2257 (h × hf1)/2257 (h - hf1)/2257 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as Efficiency of the fan Efficiency of the chimney Efficiency of the boiler Power of the boiler Efficiency of the fan Efficiency of the chimney Efficiency of the boiler Power of the boiler ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Heating wet steam at constant temperature is heating it at constant Entropy Enthalpy Volume Pressure Entropy Enthalpy Volume Pressure ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as Blow off cock Superheater Fusible plug Stop valve Blow off cock Superheater Fusible plug Stop valve ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Cut-off ratio is the ratio of Clearance volume to the volume at cut-off Swept volume to the volume at cut-off Volume at cut-off to the clearance volume Volume at cut-off to the swept volume Clearance volume to the volume at cut-off Swept volume to the volume at cut-off Volume at cut-off to the clearance volume Volume at cut-off to the swept volume ANSWER DOWNLOAD EXAMIANS APP
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