Steam Boilers, Engines, Nozzles and Turbines In an ideal impulse turbine, the 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 Axial velocity at inlet is equal to that at the outlet 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 = V cosα 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 ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The pressure of reheat steam after passing through reheater compared to inlet condition is May be more or less depending on capacity of reheater Equal More Less May be more or less depending on capacity of reheater Equal More Less ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The high steam and low water safety valve is used to blow off steam when the Steam pressure exceeds the working pressure None of these Both (A) and (B) Water level in the boiler becomes too low Steam pressure exceeds the working pressure None of these Both (A) and (B) Water level in the boiler becomes too low ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Latent heat of dry steam at atmospheric pressure is equal to 539 BTU/ lb 427 kcal/ kg 100 kcal/ kg 539 kcal/ kg 539 BTU/ lb 427 kcal/ kg 100 kcal/ kg 539 kcal/ kg ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The shell of the Cochran boiler is made hemispherical To give maximum space and strength None of these Both (A) and (B) To withstand the pressure of steam inside the boiler To give maximum space and strength None of these Both (A) and (B) To withstand the pressure of steam inside the boiler ANSWER DOWNLOAD EXAMIANS APP
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