Steam Boilers, Engines, Nozzles and Turbines Blow off cock in a boiler is used to Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit Increase the temperature of saturated steam without raising its pressure Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit Increase the temperature of saturated steam without raising its pressure 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 V cosα Vb = V cosα Vb = 0.5 V² cosα Vb = V² cosα Vb = 0.5 V cosα Vb = V cosα Vb = 0.5 V² cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In a velocity compounded impulse turbine, when steam flows through the second row of moving blades, Velocity increases Velocity decreases Pressure remains constant Velocity remains constant Velocity increases Velocity decreases Pressure remains constant Velocity remains constant ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The high pressure boiler is one, which produces steam at a pressure more than 7580 kg/cm² 10 kg/cm² 5 kg/cm² Atmospheric pressure 7580 kg/cm² 10 kg/cm² 5 kg/cm² Atmospheric pressure ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines In a Woolf type compound engine, the high pressure and low pressure cylinders Are set at 90° Have separate piston rod Have common piston rod Are set in V arrangement Are set at 90° Have separate piston rod Have common piston rod Are set in V arrangement ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Pick up the correct statement as regards Cornish boiler and Lancashire boiler Cornish has two fire tubes and Lancashire has one Cornish is water tube and Lancashire is fire tube Lancashire has two fire tubes and Cornish has one Cornish is fire tube and Lancashire is water tube Cornish has two fire tubes and Lancashire has one Cornish is water tube and Lancashire is fire tube Lancashire has two fire tubes and Cornish has one Cornish is fire tube and Lancashire is water tube ANSWER DOWNLOAD EXAMIANS APP
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