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 = 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 Vb = V cosα ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Which type of boiler can meet rapid changes of load? Horizontal water tube type Forced circulation type Vertical fire tube type Horizontal fire tube type Horizontal water tube type Forced circulation type Vertical fire tube type Horizontal fire tube type ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Which of the following is a fire tube boiler? None of these Yarrow boiler Lancashire boiler Babcock and Wilcox boiler None of these Yarrow boiler Lancashire boiler Babcock and Wilcox boiler ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Equivalent evaporation is the amount of water evaporated in a boiler from and at Room temperature 0°C 100°C Saturation temperature at given pressure Room temperature 0°C 100°C Saturation temperature at given pressure ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The fire tubes in a Locomotive boiler has __________ diameter. 7.45 mm 4.75 mm 5.47 mm 47.5 mm 7.45 mm 4.75 mm 5.47 mm 47.5 mm ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The temperature of flue gases at air heater outlet should be Above dew point temperature of flue gases Below dew point temperature of flue gases Less than wet bulb temperature of flue gases 100°C Above dew point temperature of flue gases Below dew point temperature of flue gases Less than wet bulb temperature of flue gases 100°C ANSWER DOWNLOAD EXAMIANS APP
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