Steam Boilers, Engines, Nozzles and Turbines An air preheater Enables low grade fuel to be burnt Increases evaporative capacity of the boiler All of these Increases the efficiency of the boiler Enables low grade fuel to be burnt Increases evaporative capacity of the boiler All of these Increases the efficiency of the boiler ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The efficiency of a boiler is defined as Ratio of the mass of steam produced to the mass of total water supplied in a given time None of these Ratio of the heat liberated in the furnace to the heat actually used in producing steam Ratio of heat actually used in producing steam to the heat liberated in the furnace Ratio of the mass of steam produced to the mass of total water supplied in a given time None of these Ratio of the heat liberated in the furnace to the heat actually used in producing steam Ratio of heat actually used in producing steam to the heat liberated in the furnace ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Equivalent evaporation is the amount of water evaporated in a boiler from and at 0°C 100°C Room temperature Saturation temperature at given pressure 0°C 100°C Room temperature Saturation temperature at given pressure ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The critical pressure ratio is given by (where p₁ = Initial pressure of steam, and p₂ = Pressure of steam at throat or critical pressure) p₁/p₂ p₂/p₁ p₁. p₂ p₁ + p₂ p₁/p₂ p₂/p₁ p₁. p₂ p₁ + p₂ ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Which of the following is a water tube boiler? Lancashire boiler Cochran boiler Babcock and Wilcox boiler Locomotive boiler Lancashire boiler Cochran boiler Babcock and Wilcox boiler Locomotive boiler ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as Equivalent evaporation Boiler efficiency Power of a boiler Factor of evaporation Equivalent evaporation Boiler efficiency Power of a boiler Factor of evaporation ANSWER DOWNLOAD EXAMIANS APP
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