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 = 0.5 V cosα Vb = V² cosα Vb = 0.5 V² cosα Vb = V cosα Vb = 0.5 V cosα Vb = V² cosα Vb = 0.5 V² cosα Vb = V cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Presence of moisture in fuel oil would Aid in proper combustion Clean the nozzles Keep the burner tips cool Because sputtering, possibly extinguishing flame Aid in proper combustion Clean the nozzles Keep the burner tips cool Because sputtering, possibly extinguishing flame ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Water boils when its vapor pressure Equals that of the surroundings Equals the pressure of water in the container Equals to atmospheric pressure Equals 760 mm of mercury Equals that of the surroundings Equals the pressure of water in the container Equals to atmospheric pressure Equals 760 mm of mercury ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The actual power supplied by the engine crankshaft is called Indicated power Frictional power None of these Brake power Indicated power Frictional power None of these Brake power ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The economiser is used in boilers to Increase flue gas temperature Increase thermal efficiency of boiler Extract heat from the exhaust flue gases Economize on fuel Increase flue gas temperature Increase thermal efficiency of boiler Extract heat from the exhaust flue gases Economize on fuel ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Size of boiler tubes is specified by Inside diameter and thickness Outside diameter and inside diameter Outside diameter and thickness Mean diameter and thickness Inside diameter and thickness Outside diameter and inside diameter Outside diameter and thickness Mean diameter and thickness ANSWER DOWNLOAD EXAMIANS APP
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