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 = 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 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Hard coke is produced by carburization of coal at Atmospheric temperature 500-600°C 950-1100°C 700-850°C Atmospheric temperature 500-600°C 950-1100°C 700-850°C ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines By compounding the expansion of steam in two or more cylinders, the ratio of expansion Increases None of these Does not change Decreases Increases None of these Does not change Decreases ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The ratio of brake power to the indicated power is known as Indicated thermal efficiency Mechanical efficiency Overall efficiency Brake thermal efficiency Indicated thermal efficiency Mechanical efficiency Overall efficiency Brake thermal efficiency ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Steam in water tube boiler as compared to fire tube boiler Can be raised rapidly Is raised at same rate Is raised at slower rate Could be raised at fast/slow rate depending on design Can be raised rapidly Is raised at same rate Is raised at slower rate Could be raised at fast/slow rate depending on design ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Multi-stage steam turbines are of the Reaction type Pressure compounded type Velocity compounded type All of these Reaction type Pressure compounded type Velocity compounded type All of these ANSWER DOWNLOAD EXAMIANS APP
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