Steam Boilers, Engines, Nozzles and Turbines For combustion of a fuel, following is essential Correct fuel air ratio All the three above Proper ignition temperature O₂ to support combustion Correct fuel air ratio All the three above Proper ignition temperature O₂ to support combustion ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The maximum discharge through a chimney occurs when the height of chimney is Infinitely long Outside temperature is very low Around 200 meters Equal to the height of the hot gas column producing draught Infinitely long Outside temperature is very low Around 200 meters Equal to the height of the hot gas column producing draught ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Sulphur in coal results in Corroding air heaters All of these Spontaneous combustion during coal storage Facilitating ash precipitation Corroding air heaters All of these Spontaneous combustion during coal storage Facilitating ash precipitation ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle) V = 44.72 K hd V = 44.72 hd K V = 44.72 K hd V = 44.72 K hd V = 44.72 K hd V = 44.72 hd K V = 44.72 K hd V = 44.72 K hd ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines The size of a boiler drum in pulverized fuel fired boiler, as its size and capacity, (steam pressure and flow ratings) increase Increases Decreases Remains unchanged Increases/decreases depending on steam temperature requirements Increases Decreases Remains unchanged Increases/decreases depending on steam temperature requirements ANSWER DOWNLOAD EXAMIANS APP
Steam Boilers, Engines, Nozzles and Turbines Lancashire boiler is used where working pressure and power required are None of these High Low Moderate None of these High Low Moderate ANSWER DOWNLOAD EXAMIANS APP
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