Steam Boilers, Engines, Nozzles and Turbines One kilowatt-hour energy is equivalent to 3600 kW/sec 3600 kJ 360 kJ 1000 J 3600 kW/sec 3600 kJ 360 kJ 1000 J 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 Superheater Injector Economizer Air-preheater Superheater Injector Economizer Air-preheater ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A condenser in a steam power plant Reduces back pressure of steam All of these Reduces temperature of exhaust steam Increases expansion ratio of steam Reduces back pressure of steam All of these Reduces temperature of exhaust steam Increases expansion ratio of steam ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Willian’s line follows the law (where b = A constant representing the shape of the Willian’s line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour) I.P. = b × m + a I.P. = a × m + b m = (b/I.P.) - a m = a + b × I.P. I.P. = b × m + a I.P. = a × m + b m = (b/I.P.) - a m = a + b × I.P. ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle) Vb = V² cosα Vb = 0.5 V² cosα Vb = 0.5 V cosα Vb = V cosα Vb = V² cosα Vb = 0.5 V² cosα Vb = 0.5 V cosα Vb = V cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called Nozzle efficiency Condenser efficiency Boiler efficiency Vacuum efficiency Nozzle efficiency Condenser efficiency Boiler efficiency Vacuum efficiency ANSWER DOWNLOAD EXAMIANS APP
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