Steam Boilers, Engines, Nozzles and Turbines The critical pressure gives the velocity of steam at the throat Less than the velocity of sound Equal to the velocity of sound None of these More than the velocity of sound Less than the velocity of sound Equal to the velocity of sound None of these More than the velocity of sound ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The coal requirement per kW hour generation in the thermal power plant is of the order of 0.1 to 0.2 kg 1.0 to 1.5 kg 0.2 to 0.4 kg 0.6 to 0.8 kg 0.1 to 0.2 kg 1.0 to 1.5 kg 0.2 to 0.4 kg 0.6 to 0.8 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 = 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 Vb = V² cos α ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Over fire burning is the phenomenon of Supply of excess, air Burning CO and unburnt in upper zone of furnace by supplying more air Supply of excess coal Fuel bed firing Supply of excess, air Burning CO and unburnt in upper zone of furnace by supplying more air Supply of excess coal Fuel bed firing ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Which of the following gases has the highest calorific value? Coal gas Producer gas Blast furnace gas Water gas Coal gas Producer gas Blast furnace gas Water gas ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The indicated thermal efficiency is defined as the Ratio of brake power to the indicated power Ratio of thermal efficiency to the Rankine efficiency Ratio of heat equivalent to indicated power to the energy supplied in steam Product of thermal efficiency and Rankine efficiency Ratio of brake power to the indicated power Ratio of thermal efficiency to the Rankine efficiency Ratio of heat equivalent to indicated power to the energy supplied in steam Product of thermal efficiency and Rankine efficiency ANSWER DOWNLOAD EXAMIANS APP
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