Steam Boilers, Engines, Nozzles and Turbines Duplex feed pumps are used in small steam boilers. These operate on the principle of Axial flow pump Centrifugal pump Gear pump Reciprocating pump Axial flow pump Centrifugal pump Gear pump Reciprocating pump ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity ‘V’ at inlet) Vb = 0.5 V² cosα Vb = V² cos α Vb = 0.5 V cosα Vb = V cos α Vb = 0.5 V² cosα Vb = V² cos α Vb = 0.5 V cosα Vb = V cos α ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as Economizer Injector Air-preheater Superheater Economizer Injector Air-preheater Superheater ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts. and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is 0.8 0.25 0.5 0.4 0.8 0.25 0.5 0.4 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Steam turbines are used for All of these Large marine propulsion Electric power generation Direct drive of fans, compressors, pumps All of these Large marine propulsion Electric power generation Direct drive of fans, compressors, pumps ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The pressure at which latent heat of vaporisation of water is zero, is Below atmospheric pressure 1 kg/cm² 100 kg/cm² 225.6 kg/cm² Below atmospheric pressure 1 kg/cm² 100 kg/cm² 225.6 kg/cm² ANSWER DOWNLOAD EXAMIANS APP
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