Steam Boilers, Engines, Nozzles and Turbines The evaporation of 15.653 kg of water per hour from and at 100°C is called Factor of evaporation Equivalent evaporation One boiler h.p. Evaporative capacity Factor of evaporation Equivalent evaporation One boiler h.p. Evaporative capacity ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The shell of the Cochran boiler is made hemispherical To withstand the pressure of steam inside the boiler To give maximum space and strength Both (A) and (B) None of these To withstand the pressure of steam inside the boiler To give maximum space and strength Both (A) and (B) None of these ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called None of these Induced steam jet draught Forced steam jet draught Chimney draught None of these Induced steam jet draught Forced steam jet draught Chimney draught ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Feed water conditioning in thermal power plants in done to Increase heat transfer rate Increase steam parameters Reduce hardness and for removal of solids Increase efficiency of thermal power plant Increase heat transfer rate Increase steam parameters Reduce hardness and for removal of solids Increase efficiency of thermal power plant ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines 100% efficiency of a thermal cycle cannot be achieved because of Frictional losses Leakage It is not possible to achieve 0°K temperature Non availability of ideal substance Frictional losses Leakage It is not possible to achieve 0°K temperature Non availability of ideal substance ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity ‘V’ at inlet) Vb = 0.5 V cosα Vb = V² cos α Vb = V cos α Vb = 0.5 V² cosα Vb = 0.5 V cosα Vb = V² cos α Vb = V cos α Vb = 0.5 V² cosα ANSWER DOWNLOAD EXAMIANS APP
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