Steam Boilers, Engines, Nozzles and Turbines The diameter of internal flue tubes of a Lancashire boiler is about ___ that of its shell. Two-fifth One-fourth One-half One-third Two-fifth One-fourth One-half One-third ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In regenerative air preheaters, the heat is transferred By direct mixing From heating an intermediate material and then heating the air from this material From a metal wall from one medium to another Heat is transferred by bleeding some gas from furnace By direct mixing From heating an intermediate material and then heating the air from this material From a metal wall from one medium to another Heat is transferred by bleeding some gas from furnace ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A steam nozzle converts Potential energy into heat energy of steam Kinetic energy into heat energy of steam Heat energy of steam into kinetic energy Heat energy of steam into potential energy Potential energy into heat energy of steam Kinetic energy into heat energy of steam Heat energy of steam into kinetic energy Heat energy of steam into potential energy ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Latent heat of dry steam at atmospheric pressure is equal to 427 kcal/ kg 539 kcal/ kg 539 BTU/ lb 100 kcal/ kg 427 kcal/ kg 539 kcal/ kg 539 BTU/ lb 100 kcal/ kg 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 = V² cos α Vb = V cos α Vb = 0.5 V² cosα Vb = 0.5 V cosα Vb = V² cos α Vb = V cos α Vb = 0.5 V² cosα Vb = 0.5 V cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The ratio of heat utilized to produce steam and the heat liberated in furnace is known as Factor of evaporation Boiler effectiveness Boiler efficiency Boiler evaporative capacity Factor of evaporation Boiler effectiveness Boiler efficiency Boiler evaporative capacity ANSWER DOWNLOAD EXAMIANS APP
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