Steam Boilers, Engines, Nozzles and Turbines The crown of the fire box is made hemispherical in order to Give maximum space 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 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines 100% efficiency of a thermal cycle cannot be achieved because of Leakage It is not possible to achieve 0°K temperature Frictional losses Non availability of ideal substance Leakage It is not possible to achieve 0°K temperature Frictional losses Non availability of ideal substance ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Ultimate analysis of fuel is determination of percentage of Fixed carbon, ash, volatile matter, moisture Higher calorific value Carbon, hydrogen, nitrogen, sulphur, moisture Lower calorific value Fixed carbon, ash, volatile matter, moisture Higher calorific value Carbon, hydrogen, nitrogen, sulphur, moisture Lower calorific value ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Which of the following compound steam engine requires a smaller flywheel? Tandem type Woolf type Receiver type All of these Tandem type Woolf type Receiver type All of these ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The missing quantity per stroke is equal to Cylinder feed + indicated mass of steam Mass of cushion steam + cylinder feed Mass of cushion steam + indicated mass of steam Cylinder feed indicated mass of steam Cylinder feed + indicated mass of steam Mass of cushion steam + cylinder feed Mass of cushion steam + indicated mass of steam Cylinder feed indicated mass of steam 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
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