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 = V cosα Vb = V² cosα Vb = 0.5 V cosα Vb = 0.5 V² cosα Vb = V cosα Vb = V² cosα Vb = 0.5 V cosα Vb = 0.5 V² cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines An economiser in a boiler Decreases steam pressure Increases steam flow Increases steam pressure Decreases fuel consumption Decreases steam pressure Increases steam flow Increases steam pressure Decreases fuel consumption ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The three "Ts" for good combustion are Total air, time, and temperature Total air, true fuel, and turbulence Thorough mixing, total air and temperature Temperature, time, and turbulence Total air, time, and temperature Total air, true fuel, and turbulence Thorough mixing, total air and temperature Temperature, time, and turbulence ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are Supplied by same manufacturer loose and assembled at site Purchased from several parties and packed together at site Supplied mounted on a single base Packaged boiler does not exist Supplied by same manufacturer loose and assembled at site Purchased from several parties and packed together at site Supplied mounted on a single base Packaged boiler does not exist ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Blading efficiency is also known as Diagram efficiency Nozzle efficiency None of these Stage efficiency Diagram efficiency Nozzle efficiency None of these Stage efficiency ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Fire tube boilers are Externally fired Internally as well as externally fired Internally fired None of these Externally fired Internally as well as externally fired Internally fired None of these ANSWER DOWNLOAD EXAMIANS APP
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