Steam Boilers, Engines, Nozzles and Turbines The numbers of fire tubes in a Cochran boiler are 75 165 115 225 75 165 115 225 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The velocity of steam at throat of the nozzle is __________ the velocity of sound. None of these More than Less than Equal to None of these More than Less than Equal to ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The safety valve at superheater as compared to drum safety valve setting is set at Any value Lower value Higher value Same value Any value Lower value Higher value Same value 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 = V cos α Vb = V² cos α Vb = 0.5 V² cosα Vb = 0.5 V cosα Vb = V cos α Vb = V² cos α Vb = 0.5 V² cosα Vb = 0.5 V cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines An air preheater Increases the efficiency of the boiler Increases evaporative capacity of the boiler Enables low grade fuel to be burnt All of these Increases the efficiency of the boiler Increases evaporative capacity of the boiler Enables low grade fuel to be burnt All of these ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The diameter of a cylindrical shell of a Scotch marine boiler varies from 1.5 to 2 m 3.5 to 4.5 m 2.5 to 3.5 m None of these 1.5 to 2 m 3.5 to 4.5 m 2.5 to 3.5 m None of these ANSWER DOWNLOAD EXAMIANS APP
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