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 = V cosα Vb = 0.5 V cosα Vb = 0.5 V² cosα Vb = V² cosα Vb = V cosα Vb = 0.5 V cosα Vb = 0.5 V² cosα Vb = V² cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The pressure at which latent heat of vaporisation of water is zero, is 100 kg/cm² 225.6 kg/cm² 1 kg/cm² Below atmospheric pressure 100 kg/cm² 225.6 kg/cm² 1 kg/cm² Below atmospheric pressure ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The friction in the nozzle __________ exit velocity of steam. Decreases Increases None of these Has no effect on Decreases Increases None of these Has no effect on ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The ratio of the clearance volume to the swept volume is called Clearance ratio Cut-off ratio None of these Expansion ratio Clearance ratio Cut-off ratio None of these Expansion ratio ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The number of drums in Benson steam generator is One steam drum and one water drum One No drum Two One steam drum and one water drum One No drum Two ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Stoichiometric quantity of air is the Air required to convert CO into CO₂ Air present in atmosphere at NTP conditions Air required for optimum combustion so as to have reasonable excess air Air required for complete combustion of fuel with no excess air Air required to convert CO into CO₂ Air present in atmosphere at NTP conditions Air required for optimum combustion so as to have reasonable excess air Air required for complete combustion of fuel with no excess air ANSWER DOWNLOAD EXAMIANS APP
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