Steam Boilers, Engines, Nozzles and Turbines For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine. Twice Three times Equal to Four times Twice Three times Equal to Four times ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The principal function of a stop valve is 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 In an ideal impulse turbine, the Axial velocity at inlet is equal to that at the outlet Relative velocity at the inlet of the moving blade is equal to that at the outlet Whirl velocity at inlet is equal to that at the outlet Absolute velocity at the inlet of moving blade is equal to that at the outlet Axial velocity at inlet is equal to that at the outlet Relative velocity at the inlet of the moving blade is equal to that at the outlet Whirl velocity at inlet is equal to that at the outlet Absolute velocity at the inlet of moving blade is equal to that at the outlet ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is Less May be less or more depending on temperature More Equal Less May be less or more depending on temperature More Equal ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Besides mean effective pressure, the data required to determine the indicated power of an engine include Piston diameter, length of stroke and speed of rotation Piston diameter, length of stroke and calorific value of fuel Piston diameter, specific fuel consumption and Calorific value of fuel Specific fuel consumption, speed of rotation and torque Piston diameter, length of stroke and speed of rotation Piston diameter, length of stroke and calorific value of fuel Piston diameter, specific fuel consumption and Calorific value of fuel Specific fuel consumption, speed of rotation and torque ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Expanding steam to a very low pressure (high vacuum) in steam engines is Desirable Uneconomical Essential Economical Desirable Uneconomical Essential Economical ANSWER DOWNLOAD EXAMIANS APP
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