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 = 0.5 V² cosα Vb = 0.5 V cosα Vb = V² cosα Vb = V cosα Vb = 0.5 V² cosα Vb = 0.5 V cosα Vb = V² cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The maximum heat loss is a boiler occurs due to Dry flue gases Moisture in fuel Steam formation Unburnt carbon Dry flue gases Moisture in fuel Steam formation Unburnt carbon ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The diameter of internal flue tubes in a Lancashire boiler compared to its shell is Two-fourth Two-fifth One-third One-half Two-fourth Two-fifth One-third One-half ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The chimney draught varies with Temperature of furnace gases Climatic conditions Height of chimney All of these Temperature of furnace gases Climatic conditions Height of chimney All of these ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The crown of the fire box is made hemispherical in order to Give maximum strength Resist intense heat in fire box Withstand pressure inside boiler Give maximum space Give maximum strength Resist intense heat in fire box Withstand pressure inside boiler Give maximum space ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The basic purpose of drum in boiler is to Remove salts from water Serve as storage of steam Separate steam from water Serve as storage of feed water for water wall Remove salts from water Serve as storage of steam Separate steam from water Serve as storage of feed water for water wall ANSWER DOWNLOAD EXAMIANS APP
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